Agriculture, Soil, Fertilizer & Farm Operations worked example

Field Work Rate with effective implement width of 20 ft: a worked example

Suppose effective implement width falls to 20 ft. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate field work rate from implement width, ground speed, field efficiency, and the acres-per-hour conversion factor.

The inputs for this scenario

  • Effective implement width: 20 ft (the input this scenario stresses; the baseline uses 40)
  • Field ground speed: 6 mph (held at the documented default)
  • Field efficiency: 0.82 x (held at the documented default)
  • Acres-per-hour unit conversion: 0.12 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Field work rate = implement width x ground speed x field efficiency x 0.1212.
  • Field work rate works out to 11.93 acres / hr at these inputs, and this is the headline figure for the scenario.
  • Theoretical field coverage rate works out to 98.4 value at these inputs.
  • Acres per hour conversion factor works out to 0.12 x at these inputs.
  • Width times speed works out to 120 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where effective implement width sits at 40 ft and the headline result is 23.85 acres / hr, this scenario comes in 50% below the baseline at 11.93 acres / hr.
  • It multiplies effective width, ground speed, and field efficiency by the 0.1212 unit factor to produce realistic acres covered per hour. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Field work rate: 11.93 acres / hr (headline result)
  • Theoretical field coverage rate: 98.4 value
  • Acres per hour conversion factor: 0.12 x
  • Width times speed: 120 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Field Work Rate calculator, set effective implement width to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.