This Compost mix calulator is courtesy of klickitat county

This calculator will help you design a compost recipe for many common household organic wastes. It will determine the Total C:N Ratio for a mix of materials.

The calculator has built in average values for bulk density, percent moisture, percent nitrogen and C:N Ratio, as well as the values required to compute availability of carbon. 

The results are presented in a simple, one part this - two parts of that, format.

1. Choose a Material.
2. Enter a CuFt value.
3. Press Tab or click outside the CuFt field.
4. Each time a change is made to the Material or the CuFt, the form recalculates.
5. The recipe is displayed below the table in plain language.

The calculator requires a JavaScript enabled browser

Detailed information on the Compost Mix Calculator and the calculations it performs.

Please note: the masurements are in foot & lb