Harvest Capacity
Type your field size and harvester specs. We’ll work out how many hours you’ll spend in the cab, how many workdays that means, and what you’ll produce.
Field & crop
Harvester
Workday
How many productive hours of harvest you can run in a typical day.
How the numbers work.
Effective Field Capacity (EFC)— acres per hour your machine actually covers, including the time it loses to turns, refills, blockages and other unproductive moments.
EFC = width (ft) × speed (mph) ÷ 8.25 × efficiency
The 8.25constant converts feet × mph into acres per hour at 100% efficiency. (43,560 ft² per acre ÷ 5,280 ft per mile = 8.25.) Multiplying by efficiency (typically 0.65–0.75 for field machinery) gives the real-world acres/hr you’ll cover.
Hours to harvest = acres ÷ EFC. Days to harvest= hours ÷ your workday length (default 10). Total production = acres × production per acre. Production per hour= EFC × production per acre.
The math comes straight from ag-engineering standards used in extension publications since the 1980s. We just removed the spreadsheet.
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