How we got these numbers
Enter bale size, density, and (optionally) payload to see the step-by-step.
Hay Bale Weight & Load Planner
Units: Saved on this device
Results
Volume: —
Bale weight: — (— )
Max bales by weight: —
Estimates only. Verify before purchasing materials or operating equipment.
How this calculator works
We compute bale volume from size, multiply by density to estimate weight, then compare to your payload to show bales by weight.
Formulas
- Round volume = π·(D/2)²·W (convert in/cm → ft/m)
- Square volume = L·W·H (convert in/cm → ft/m)
- Bale weight = volume × density × (1 + moisture%/100)
- Max bales by weight = ⌊ payload ÷ bale weight ⌋
Assumptions & notes
- Densities vary by crop, baler tension, and moisture—use scale weights when available.
- Payload check is weight only; deck space, stacking, tie-down, and legal axle limits are not evaluated.
- Rounding: volumes to 0.1, weights to whole lb (or kg), tons to 2 decimals.
Worked example
5×5 round (60×60 in), density 10 lb/ft³, moisture 0%, payload 10,000 lb:
- Volume = π·(5/2)²·5 ≈ 98.2 ft³
- Weight = 98.2 × 10 ≈ 982 lb (~0.49 tons)
- Max bales by weight = ⌊10,000 ÷ 982⌋ = 10 bales
FAQ
How is bale weight estimated? Volume × density, with an optional moisture % adjustment.
What density should I use? Start with: grass ~10 lb/ft³ (160 kg/m³), alfalfa ~12 lb/ft³ (192 kg/m³), straw ~8 lb/ft³ (128 kg/m³), then refine.
Does this include trailer space or axle limits? No—weight only. Verify space and legal requirements.
Prepared by AgCalculator · Last updated October 27, 2025