What this calculator does
Acres per hour works out field work rate from implement width and travel speed, accounting for overlap. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaAcres/hour = (width(ft) × speed(mph) / 8.25) × (1 − overlap); 8.25 = 43,560 ft²/acre ÷ 5,280 ft/mile
The inputs explained
| Field | What to enter |
|---|---|
| Working width (ft) | A number, measured in ft. Starts at 30. |
| Travel speed (mph) | A number, measured in mph. Starts at 5. |
| Overlap (%) | A number, measured in %. Starts at 10. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with working width
Every other input is held at the calculator’s starting values while working width varies. Select any row to load that scenario into the calculator.
How the answer changes with working width
| Working width (ft) | Field work rate | Ideal rate with no overlap | Inputs used |
|---|---|---|---|
| 15 | 8.18 acres/hour | 9.09 acres/hour | 15.0 ft width, 5.0 mph, 10% overlap |
| 22.5 | 12.27 acres/hour | 13.64 acres/hour | 22.5 ft width, 5.0 mph, 10% overlap |
| 30 | 16.36 acres/hour | 18.18 acres/hour | 30.0 ft width, 5.0 mph, 10% overlap |
| 45 | 24.55 acres/hour | 27.27 acres/hour | 45.0 ft width, 5.0 mph, 10% overlap |
| 60 | 32.73 acres/hour | 36.36 acres/hour | 60.0 ft width, 5.0 mph, 10% overlap |
| 90 | 49.09 acres/hour | 54.55 acres/hour | 90.0 ft width, 5.0 mph, 10% overlap |