Hay Bale Count
Calculator

The calculator divides your total feed requirement (based on animal count, weight, and feeding duration) by the average weight of a single bale, accounting for the fact that round and square bales vary considerably in weight.

Bale weight depends on bale dimensions, hay type, moisture content, and how tightly the baler packed it, so a 'standard' round bale can range from around 450 kg to over 900 kg (1,000-2,000 lbs) — always use your actual or measured average bale weight rather than a generic assumption.

The base estimate reflects intake needs, not purchase needs — hay feeding waste from trampling, weathering, and refusal typically runs 10-25% depending on feeder type, so add that percentage on top of the calculated bale count when deciding how much to actually buy or bale.

Count the number of days animals will rely primarily on stored hay rather than pasture, typically from first hard frost or pasture dormancy through spring green-up, and use that day count as the feeding period in the calculation, adding a buffer for a late spring.

Yes — a lactating animal, a growing animal, and a dry adult have different daily intake needs, so for mixed groups it's more accurate to calculate hay needs for each class separately and sum the bale counts rather than using one average intake rate for the whole herd.