Every calculation,
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Quick picks
- EducationTest Percentile CalculatorPick SAT, ACT, GRE or IQ, or enter any test's mean and standard deviation — see where your score falls on the bell curve.
- TravelFlight Time CalculatorDistance and average speed in, estimated flight time out — a quick sanity check before you book.
- FinanceIndia Income Tax CalculatorSide-by-side comparison of your tax liability under both regimes — instantly see which one saves you more.
- EducationCollege GPA ConverterPercentage in — letter grade, 4.0 GPA, and 10-point GPA out.
- AutomotiveCost Per Mile CalculatorTotal cost ÷ miles driven — for fuel, rentals, or fleet tracking.
- EducationScholarship CalculatorTotal cost minus total aid — your real out-of-pocket college expense.
- Health & FitnessFibre Intake CalculatorIOM daily fibre recommendations by age and gender.
- MathAlgebra SolverType the equation or drop in the coefficients — see the discriminant and exact roots, including a + bi form, with steps.
612 results
Finance
84Second Income vs Childcare Break-Even Calculator
NetGain
What a second salary leaves the household after tax, childcare, commuting and withdrawn benefits.
OpenReturn to Office Commute Cost Calculator
TrueCommute
The full cost of office days in cash and hours, and the pre-tax pay rise that would offset it.
OpenDigital VAT Place-of-Supply Calculator
VatRoute
Cross-border digital VAT position, threshold check, and the filing saved by one scheme.
OpenSales Tax Nexus Threshold Calculator
NexusWatch
Whether a state triggers economic nexus, and what multi-state compliance costs.
OpenMath
183Percentage Calculator
PercentSolver
Three percentage modes with step-by-step explanations.
OpenFraction Calculator
FractionFox
Add, subtract, multiply, and simplify fractions.
OpenVedic Multiplication Calculator
Ginti Vedic
Multiply two numbers with the Vedic sutras, step by step.
OpenVedic Square Calculator
Ginti Vedic
Square any number with the Vedic sutras, shown as an animated step-by-step picture.
OpenHealth & Fitness
60TDEE & Macro Calculator
MacroLab
Daily energy expenditure with personalised macro splits.
OpenACA Subsidy Calculator 2026 (400% Cliff)
Ginti US
Your 2026 premium tax credit for a marketplace plan, now that the credit stops above 400% of the poverty line.
OpenMedicare Part D Cost Calculator (2026 and 2027)
Ginti US
What you pay for drugs under Part D in 2026 or 2027, with the deductible, 25% coinsurance and the yearly cap, and the monthly bills under the Prescription Payment Plan.
OpenBMI Calculator
BodyIndex
Body mass index with healthy-range guidance.
OpenConverters
58Inches to Centimeters Converter
LengthWise
Convert inches to centimetres instantly, with the exact 2.54 factor, a reverse converter, and a reference table of commo
OpenCentimeters to Inches Converter
LengthWise
Convert centimetres to inches using the exact 2.54 factor, with a reverse converter and a reference table covering the a
OpenFeet to Meters Converter
LengthWise
Convert feet to metres with the exact 0.3048 factor, a reverse converter, and a table of room, ceiling, and building dim
OpenMeters to Feet Converter
LengthWise
Convert metres to feet by dividing by 0.3048, with a reverse converter and a reference table spanning heights and buildi
OpenBuilt for clarity, not clutter
No sign-ups, no paywalls, no interruptions. Just answers — and the math behind them.
Real-time
Every input updates results instantly. No submit buttons.
Visual
Charts and breakdowns turn raw numbers into decisions.
Private
Calculations run in your browser. Nothing sent to a server.
Works offline
Once loaded, most calculators keep working without a connection.