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EcoTrack
Balance your compost pile's greens and browns.
Microbes that break down compost need both carbon (energy) and nitrogen (protein-building) in roughly a 25-30:1 ratio — too much carbon (browns: dry leaves, cardboard) and decomposition slows down; too much nitrogen (greens: food scraps, grass clippings) and the pile turns slimy and smelly.
This calculator blends the two materials' individual C:N ratios by mass as a practical estimate — real compost science also weighs moisture content and particle size, but this ratio is the single biggest lever for a healthy pile.
Molar mass of any chemical formula (e.g. H2O, C6H12O6, Ca(OH)2).
OpenPercent composition of an element within a chemical formula.
OpenSimplest whole-number ratio formula from elemental masses or percentages.
OpenPercent yield from actual and theoretical reaction yields.
OpenBlended C:N ratio
71.667
Mass-weighted approximation — ideal compost sits around 25-30:1
What you entered
Mass-weighted green contribution
5 × 15= 75Mass-weighted brown contribution
10 × 100= 1000Blended C:N ratio (mass-weighted average)
(75 + 1000) ÷ 15= 71.6667:1Result
Blended C:N ratio: 71.667
This mix has a blended C:N ratio of about 71.7:1 — on the carbon-rich side, add more greens.