Yield conversion
Bushels per acre to tonnes per hectare
Convert U.S. crop yields to the metric tonnes-per-hectare values used in international comparisons, with crop-specific bushel weights.
bu/acre to t/ha
Uses exact NIST pound and acre definitions with USDA FSA bushel weights.
Formula
t/ha = bu/acre × lb/bu × 0.45359237 ÷ 1,000 ÷ 0.40468564224
For corn (56 lb/bu) the combined factor is 0.062768; for wheat and soybeans (60 lb/bu) it is 0.067251.
Conversion factors by crop
| Crop | lb/bu | t/ha per bu/acre | 2025 U.S. average example |
|---|---|---|---|
| Corn (shelled) | 56 | 0.062768 | 186.5 bu/acre → 11.71 t/ha |
| Wheat | 60 | 0.067251 | 54.9 bu/acre → 3.69 t/ha |
| Soybeans | 60 | 0.067251 | 53 bu/acre → 3.56 t/ha |
| Grain sorghum | 56 | 0.062768 | 72.6 bu/acre → 4.56 t/ha |
| Rye | 56 | 0.062768 | — |
| Barley | 48 | 0.053801 | 80 bu/acre → 4.30 t/ha |
| Rice (rough) | 45 | 0.050438 | — |
| Canola / rapeseed | 50 | 0.056043 | — |
| Oats | 32 | 0.035867 | 73.8 bu/acre → 2.65 t/ha |
FAQ
How do I convert corn yield from bu/acre to t/ha?
Multiply by 0.0628. For example, the final 2025 U.S. average of 186.5 bu/acre is about 11.71 t/ha.
Why is the factor different for wheat and soybeans?
Wheat and soybeans use a 60 lb bushel instead of corn's 56 lb, so their factor is 0.0673 t/ha per bu/acre.
How do I convert t/ha back to bu/acre?
Divide by the same crop-specific factor: for corn, t/ha ÷ 0.062768 = bu/acre.