Enter the total weight of carbon (lbs) and the total weight of nitrogen (lbs) into the Compost Ratio Calculator. The calculator will evaluate and display the Compost Ratio.

- All Ratio Calculators
- Mulch Cost Per Cubic Yard Calculator
- Void Ratio Calculator
- Aggregate Density Calculator

## Compost Ratio Formula

The following formula is used to calculate the Compost Ratio.

**COMPR = WC / WN**

- Where COMPR is the Compost Ratio
- WV is the total weight of carbon (lbs)
- WN is the total weight of nitrogen (lbs)

The ideal ratio is roughly 30:1 carbon to nitrogen.

## How to Calculate Compost Ratio?

The following example problems outline how to calculate Compost Ratio.

Example Problem #1:

- First, determine the total weight of carbon (lbs).
- The total weight of carbon (lbs) is given as: 500.

- Next, determine the total weight of nitrogen (lbs).
- The total weight of nitrogen (lbs) is provided as: 20.

- Finally, calculate the Compost Ratio using the equation above:

COMPR = WC / WN

The values given above are inserted into the equation below and the solution is calculated:

COMPR = 500 / 20 = 25:1

Example Problem #2:** **

For this problem, the variables required are provided below:

total weight of carbon (lbs) = 600

total weight of nitrogen (lbs) = 20

Test your knowledge using the equation and check your answer with the calculator above.

COMPR = WC / WN** = ?**