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Crop Yield Estimate Calculator

Estimates yield from counts in the standing crop.

Count several sample areas across the field and average. Maize is around 8–10 cobs per m², and wheat in the hundreds.

Average a good sample of heads, including small ones.

g

From a past harvest of this variety, at the moisture you want the yield at.

%
lb/bu

For the bushel figure only. US standards are 60 lb for wheat and soybeans, and 56 lb for maize.

Estimated yield
— t/ha

Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.

Estimated yield — lb/acre
Estimated yield — bu/acre
For the whole area —
Reading this —

The formula

yield (kg/ha) = heads per m² × grains per head × thousand grain weight (g) ÷ 100 × (1 − loss)

This is the yield components method. Each part can be counted or estimated in the field.

What to watch out for

Sample in several parts of the field, avoiding the headlands. Count a measured area of row. For a harvest forecast based on weights you cut and weigh, use the harvest estimate calculator.

Frequently Asked Questions

How do you estimate wheat yield?

500 heads per m², 35 grains per head and a 45 g thousand grain weight come to 7.88 t/ha before losses.

When should I make the estimate?

After flowering, when the grain count has been set. The grain weight still depends on the weather up to maturity.

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