Hay Bale Weight Calculator
Estimate round or square bale weight from dimensions and density, then convert a target hay supply into bale count.
Planning estimate only. Moisture, forage species, and baler tension change real weight. Weigh a representative load when buying or selling.
How bale weight is calculated
Square bale volume is length times width times height. Round bale volume is 3.14 times radius squared times width. Bale weight is volume times density, using the Penn State density scale of loose to tight bales.
Sources
Bale volume formulas and density scale: Penn State Extension. 5 by 5 round bale weight cross-check: Texas A&M AgriLife Forage Fax.