Amendment Converter

Use this form to convert OrganiCalc recommended amendments to other amendments of your choice.

You will need to know the percentage by weight of the various elements and compounds your amendment supplies. This information can be found on the product label.

A note about P (phosphorus) and K (potassium)… In N-P-K fertilizers, the P listed is actually P2O5; the K listed is actually K2O. We work in P2O5 and K2O so that you may use these values directly from the fertilizer label.