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.

## 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:

1. First, determine the total weight of carbon (lbs).
• The total weight of carbon (lbs) is given as: 500.
2. Next, determine the total weight of nitrogen (lbs).
• The total weight of nitrogen (lbs) is provided as: 20.
3. 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