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GintiCalc · Math

Math calculators

Step-by-step solvers for percentages, fractions, algebra, and everyday math.

Flagship

Percentage Calculator

PercentSolver

Three percentage modes with step-by-step explanations.

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Fraction Calculator

FractionFox

Add, subtract, multiply, and simplify fractions.

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Scientific Calculator

SciDesk

Trig, logs, powers, and a running history tape.

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Algebra Solver

AlgebraEdge

Solve linear and quadratic equations instantly.

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GCD & LCM Calculator

NumberTheory

Greatest common divisor, least common multiple, and prime factors.

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Statistics Calculator

StatsCore

Mean, median, mode, range, variance, and standard deviation.

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Random Number Generator

RandLab

Generate any number of unique or repeating random numbers.

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Triangle Calculator

TriSolve

Solve a triangle from three known parts — sides or angles.

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Permutations & Combinations

PickOrder

nPr and nCr for any n and r.

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Slope & Distance Calculator

LineLab

Slope, distance, midpoint, and line equation from two points.

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Circle Area Calculator

CircleLab

Area, circumference, and diameter from a circle's radius.

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Circle Circumference

CircleLab

Circumference of a circle from its radius.

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Square Area Calculator

GeomBench

Area and perimeter of a square from its side.

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Rectangle Area Calculator

GeomBench

Area, perimeter, and diagonal of a rectangle.

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Perimeter Calculator

GeomBench

Perimeter of a rectangle from width and height.

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Area Calculator

GeomBench

Calculate the area of rectangles and triangles from base and height.

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Triangle Area Calculator

TriArea

Triangle area from base and height.

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Cube Volume Calculator

VolLab

Volume, surface area, and space diagonal of a cube.

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Cylinder Volume Calculator

VolLab

Volume and surface area of a cylinder.

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Sphere Volume Calculator

VolLab

Volume and surface area of a sphere.

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Pythagorean Theorem Calculator

PythLab

Hypotenuse from two legs of a right triangle.

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Distance Calculator

DistCalc

Straight-line distance between two points on a plane.

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Midpoint Calculator

DistCalc

Midpoint of a segment between two points.

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Diagonal Calculator

GeomBench

Diagonal length of a square, rectangle, cube, or regular polygon.

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Inradius Calculator

GeomBench

Inradius of a triangle (from its 3 sides) or a regular polygon.

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Circumradius Calculator

GeomBench

Circumradius of a triangle (from its 3 sides) or a regular polygon.

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Centroid Calculator

GeomBench

Centroid (center of mass) of a triangle from its 3 vertices.

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Parallelogram Area Calculator

GeomBench

Area, height, and perimeter of a parallelogram from base, side, and angle.

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Trapezoid Area Calculator

GeomBench

Area of a trapezoid from its two parallel sides and height.

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Rhombus Area Calculator

GeomBench

Area, side length, and perimeter of a rhombus from its two diagonals.

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Ellipse Area Calculator

GeomBench

Area and estimated circumference of an ellipse from its semi-axes.

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Regular Polygon Area Calculator

GeomBench

Area and perimeter of any regular polygon from its number of sides and side length.

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Sector Area Calculator

GeomBench

Area and arc length of a circular sector (pie slice) from radius and angle.

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Annulus (Ring) Area Calculator

GeomBench

Area of a ring-shaped annulus from its outer and inner radii.

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Cone Volume Calculator

VolLab

Volume, surface area, and slant height of a cone from radius and height.

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Rectangular Prism (Box) Volume Calculator

VolLab

Volume, surface area, and diagonal of a rectangular box from length, width, and height.

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Square Pyramid Volume Calculator

VolLab

Volume, surface area, and slant height of a square-base pyramid.

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Ellipsoid Volume Calculator

VolLab

Volume of an ellipsoid (a 3D stretched sphere) from its three semi-axes.

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Triangular Prism Volume Calculator

VolLab

Volume and surface area of a triangular prism from its cross-section and length.

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Torus (Donut) Volume Calculator

VolLab

Volume and surface area of a torus (donut shape) from its two radii.

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Surface Area Calculator

VolLab

Total surface area of a cube, sphere, cylinder, cone, or rectangular prism.

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Square Root Calculator

RootLab

Square root and square of any number.

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Cube Root Calculator

RootLab

Cube root and cube of a number.

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Absolute Value Calculator

AbsBench

Distance of a number from zero.

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Ceiling / Floor Calculator

RoundBench

Ceiling, floor, and nearest-integer rounding.

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Rounding Calculator

RoundBench

Round to any number of decimal places.

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Factorial Calculator

FactLab

n! — factorial for any non-negative integer up to 170.

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Fibonacci Calculator

FibLab

Nth Fibonacci number and its ratio to the previous term.

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Prime Number Check

PrimeLab

Check whether a number is prime and see its prime factorisation.

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Factors Calculator

FactorFinder

All divisors of a positive integer.

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Prime Factorization Calculator

PrimeLab

Break a number down into its prime factors, written in exponent form.

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Golden Ratio Calculator

PhiLab

The golden ratio φ ≈ 1.618, and multiples of it.

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Power Calculator

PowerLab

Compute bⁿ for any base and exponent.

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Logarithm Calculator

LogBench

Logarithm in any base, natural log, and log base 10.

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Quadratic Formula Calculator

QuadSolve

Roots of ax² + bx + c = 0 using the quadratic formula.

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Modular Arithmetic Calculator

ModLab

Compute a mod m — always non-negative.

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Ratio Calculator

RatioLab

Express a ratio as a decimal and percentage.

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Proportion Calculator

RatioLab

Solve for the unknown in a proportion (cross-multiplication).

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Standard Deviation Calculator

SigmaCalc

Sample and population standard deviation from a dataset.

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Mean, Median, Mode Calculator

CenterLab

Central tendency: mean, median, and mode.

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Weighted Average Calculator

WAvgLab

Average with weights per value (e.g. weighted grades).

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Z-Score Calculator

ZLab

Standardise a score against a mean and standard deviation.

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Normal Distribution Calculator

BellCurve

Standard normal CDF for a z-score.

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Chi-Square Calculator

ChiTest

χ² statistic from observed and expected frequencies.

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Bayes' Theorem Calculator

BayesLab

Posterior probability P(A|B) via Bayes' theorem.

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Variance Calculator

SigmaCalc

Sample and population variance from a dataset.

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Permutation & Combination Calculator

CombiLab

nPr permutations and nCr combinations.

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Probability Calculator

ProbLab

Basic probability, complement, and joint probability.

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Correlation Coefficient Calculator

CorrelLab

Pearson correlation coefficient (r) between two variables.

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Linear Regression Calculator

RegressLab

Best-fit line (slope and intercept) through paired data.

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Confidence Interval Calculator

ConfidLab

Confidence interval for a sample mean.

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Margin of Error Calculator

ConfidLab

Margin of error for a sample proportion (e.g. polling).

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Quartiles & IQR Calculator

SigmaCalc

Q1, Q2, Q3, interquartile range, and outlier fences.

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Skewness Calculator

SigmaCalc

Measure the asymmetry of a dataset's distribution.

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Kurtosis Calculator

SigmaCalc

Measure how heavy-tailed or peaked a dataset's distribution is.

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T-Score Calculator

SigmaCalc

How many standard errors a sample mean is from a population mean.

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P-Value Calculator

SigmaCalc

Statistical significance from a z-score, one- or two-tailed.

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Sample Size Calculator

SigmaCalc

How many respondents you need for a target margin of error.

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Binomial Probability Calculator

SigmaCalc

Probability of exactly k successes in n independent trials.

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Poisson Distribution Calculator

SigmaCalc

Probability of a given number of events in a fixed interval.

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Expected Value Calculator

SigmaCalc

The probability-weighted average of a set of possible outcomes.

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Odds Ratio Calculator

SigmaCalc

Compare the odds of an event between two groups from a 2×2 table.

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Relative Risk Calculator

SigmaCalc

Compare event risk between an exposed and unexposed group.

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A/B Testing Calculator

SigmaCalc

Statistical significance and lift between two conversion rates.

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ANOVA Calculator

SigmaCalc

One-way analysis of variance across 2 or more groups.

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Spearman's Rank Correlation Calculator

SigmaCalc

Correlation based on ranks, robust to outliers and nonlinearity.

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Logistic Regression Calculator

SigmaCalc

Predicted probability from logistic regression coefficients.

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Hypergeometric Distribution Calculator

SigmaCalc

Probability of k successes drawn without replacement.

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Exponential Distribution Calculator

SigmaCalc

Probability density and cumulative probability of waiting times.

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Acceleration Calculator

MotionLab

Acceleration from initial and final velocity over time.

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Kinetic Energy Calculator

MotionLab

Kinetic energy of a moving object.

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Speed / Distance / Time

MotionLab

Convert between speed, distance, and time.

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Force Calculator

MotionLab

Force from mass and acceleration (Newton's second law).

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Momentum Calculator

MotionLab

Linear momentum from mass and velocity.

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Work Calculator

MotionLab

Mechanical work from force and distance.

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Potential Energy Calculator

MotionLab

Gravitational potential energy from mass, height, and gravity.

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Power Calculator (Physics)

MotionLab

Power from work (or energy) and time.

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Ohm's Law Calculator

CircuitLab

Voltage, current, resistance, and power in a simple circuit.

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Density Calculator

MatterLab

Density from mass and volume.

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Projectile Motion Calculator

MotionLab

Range, max height, and time of flight for a launched projectile.

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Velocity Calculator

MotionLab

Velocity from distance traveled and time elapsed.

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Impulse Calculator

MotionLab

Impulse from force and the time it's applied.

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Torque Calculator

MotionLab

Rotational force from applied force, lever arm, and angle.

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Angular Velocity Calculator

MotionLab

Angular velocity from angle turned and time elapsed.

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Angular Acceleration Calculator

MotionLab

Angular acceleration from change in angular velocity over time.

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Centripetal Force Calculator

MotionLab

Force needed to keep an object moving in a circle.

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Gravitational Force Calculator

MotionLab

Gravitational attraction between two masses.

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Friction Force Calculator

MotionLab

Friction force from normal force and friction coefficient.

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Pressure Calculator

MotionLab

Pressure from force distributed over an area.

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Buoyancy Calculator

MotionLab

Buoyant force from fluid density and displaced volume.

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Flow Rate Calculator

MotionLab

Volumetric flow rate from pipe area and fluid velocity.

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Bernoulli's Equation Calculator

MotionLab

Pressure at a second point in a flow, from Bernoulli's principle.

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Wavelength Calculator

MotionLab

Wavelength from wave speed and frequency.

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Frequency Calculator

MotionLab

Frequency from wave speed and wavelength.

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Half-Life Calculator

MotionLab

Remaining quantity after radioactive or exponential decay.

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Doppler Effect Calculator

MotionLab

Observed frequency shift from a moving sound source.

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Snell's Law Calculator

MotionLab

Angle of refraction as light passes between two media.

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Lens Equation Calculator

MotionLab

Image distance from a lens's focal length and object distance.

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Terminal Velocity Calculator

MotionLab

Maximum falling speed once drag force balances gravity.

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Drag Force Calculator

MotionLab

Air resistance force on a moving object.

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Lift Force Calculator

MotionLab

Aerodynamic lift force on a wing or airfoil.

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Hooke's Law Calculator

MotionLab

Restoring force from a spring's stiffness and displacement.

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Stress Calculator

MotionLab

Mechanical stress from applied force and cross-sectional area.

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Strain Calculator

MotionLab

Mechanical strain from a material's change in length.

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Young's Modulus Calculator

MotionLab

Material stiffness from stress and strain.

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Specific Heat Calculator

MotionLab

Heat energy needed to change a substance's temperature.

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Latent Heat Calculator

MotionLab

Heat energy needed for a phase change, without a temperature change.

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Thermal Expansion Calculator

MotionLab

How much a material's length changes with temperature.

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Gravitational Force Calculator

MotionLab

Newton's law of universal gravitation — force between two masses.

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Buoyant Force Calculator

MotionLab

Archimedes' principle — upward force on an object submerged in fluid.

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Carnot Efficiency Calculator

MotionLab

Maximum theoretical efficiency of a heat engine between two temperatures.

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Time Dilation Calculator

MotionLab

Einstein's special relativity — how time slows at high velocities.

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Coulomb's Law Calculator

MotionLab

Electrostatic force between two point charges.

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Decibel Calculator

MotionLab

Convert sound intensity to decibels (dB).

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de Broglie Wavelength Calculator

MotionLab

Wave nature of matter — wavelength of a moving particle.

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Photoelectric Effect Calculator

MotionLab

Einstein's photoelectric equation — electron ejection by light.

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Electric Field Calculator

MotionLab

Electric field strength and potential from a point charge.

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Capacitance Calculator

MotionLab

Parallel-plate capacitor capacitance from plate area, separation, and dielectric.

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Hawking Temperature Calculator

MotionLab

Black hole temperature and evaporation lifetime from Hawking radiation.

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Nuclear Binding Energy Calculator

MotionLab

Binding energy per nucleon using the semi-empirical mass formula.

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Magnetic Force Calculator

MotionLab

Lorentz force on a charged particle moving through a magnetic field.

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Newton's Cooling Law Calculator

MotionLab

Temperature of an object cooling over time in a fixed-temperature environment.

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Free Fall Calculator

MotionLab

Time and velocity of a free-falling object from height.

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Pendulum Calculator

MotionLab

Period and frequency of a simple pendulum from its length.

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Reynolds Number Calculator

FluidCalc

Reynolds number and flow regime from fluid properties.

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Mach Number Calculator

AeroCalc

Mach number and flight regime from velocity and speed of sound.

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Spring Energy Calculator

MotionLab

Elastic potential energy and restoring force of a spring.

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Elastic Collision Calculator

MotionLab

Final velocities after a perfectly elastic 1D collision.

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Stefan-Boltzmann Calculator

ThermoCalc

Thermal radiation power from temperature, area, and emissivity.

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Rotational Kinetic Energy Calculator

MotionLab

Rotational kinetic energy from moment of inertia and angular velocity.

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Nth Root Calculator

MathBase

The nth root of any number — generalizes square and cube roots.

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Percentage Error Calculator

LabCalc

Percentage error between experimental and theoretical values.

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Percentage Change Calculator

PercentLab

Percentage change between two numbers.

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Percent Increase / Decrease

PercentLab

Percentage increase or decrease.

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Scientific Notation Calculator

SciNotate

Convert any number to scientific notation.

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Significant Figures Calculator

SigFigs

Round to a chosen number of significant figures.

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Arithmetic Sequence Calculator

SeqLab

nth term and sum of an arithmetic sequence.

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Geometric Sequence Calculator

SeqLab

nth term and sum of a geometric sequence.

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Series & Sequences Calculator

SeqLab

Terms and partial sums of arithmetic and geometric series.

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Trigonometry Calculator

TrigLab

sin, cos, tan of any angle in degrees.

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Angles Calculator

AngleLab

Convert between degrees, radians, gradians, and turns.

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Average Calculator

AvgLab

Simple average of three values.

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Decimal to Fraction Converter

FracConv

Convert a decimal to its best rational form.

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Fraction to Decimal Converter

FracConv

Convert a fraction to its decimal form.

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Vector Calculator (2D)

VecLab

Sum, dot product, magnitude, and angle of two 2D vectors.

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Complex Number Calculator

ComplexLab

Add, subtract, multiply, and find the modulus of two complex numbers.

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Polynomial Roots Calculator

RootFinder

Roots and discriminant of a quadratic polynomial.

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Equation Solver

EqLab

Solve quadratic equations for their roots.

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Matrix Determinant Calculator

MatrixLab

Determinant of a 2×2 matrix.

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Matrix Calculator (2×2)

MatrixLab

Add and multiply two 2×2 matrices, with determinants.

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Matrix Inverse Calculator

MatrixLab

Inverse of a 2×2 matrix, via the adjugate method.

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Number Pattern Detector

PatternLab

Detect arithmetic or geometric patterns in a sequence.

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Relativistic Mass Calculator

EinsteinMass

Calculate relativistic mass at a fraction of the speed of light.

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Length Contraction Calculator

LorentzLen

Calculate how lengths contract at relativistic speeds.

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Natural Logarithm Calculator

LnCalc

Calculate ln(x), log₁₀(x), and log₂(x) with change-of-base steps.

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Matrix Addition Calculator

MatrixAdd

Add two 2×2 matrices element by element.

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Matrix Multiplication Calculator

MatrixMul

Multiply two 2×2 matrices with dot-product steps.

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Eigenvalue Calculator

EigenCalc

Find eigenvalues of a 2×2 matrix via trace and determinant.

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