About HerdMath

HerdMath is a set of free, fast calculators for people raising animals on homesteads and small farms.

Why we built it

Most farm calculators online are old PDFs, spreadsheets or pages that cover one species and don't work on a phone. HerdMath puts the everyday numbers in one place: due dates, hatch dates, hay, feed, space and weight. It works in the barn with one hand.

Where the numbers come from

Gestation lengths, intake rates, space guidelines and yield percentages are typical values from university extension services and breed associations. Every page explains the formula it uses, so you can check it.

Important

Estimates only. Individual animals vary — confirm pregnancy and health questions with your veterinarian. For medication, dosing or any health decision, talk to your veterinarian.