Coffee, Tea, Roasting & Dry Goods Processing worked example

Grinder Throughput at 63% grinder operating efficiency: a worked example

Suppose grinder operating efficiency falls to 63%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate effective grinder throughput from ground coffee or dry goods output, grinder runtime, and operating efficiency.

The inputs for this scenario

  • Finished ground coffee output: 720 lb (held at the documented default)
  • Grinder runtime: 3 hr (held at the documented default)
  • Grinder operating efficiency: 63 % (the input this scenario stresses; the baseline uses 88)

Working through the calculation

  • The calculation starts from the formula this tool documents: Raw grinder throughput = finished ground output รท grinder runtime.
  • effective grinder throughput works out to 151 lb / hr at these inputs, and this is the headline figure for the scenario.
  • raw grinder throughput works out to 240 lb / hr at these inputs.
  • grinder operating efficiency works out to 63 % at these inputs.
  • grinder runtime works out to 3 hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where grinder operating efficiency sits at 88% and the headline result is 211 lb / hr, this scenario comes in 28.41% below the baseline at 151 lb / hr.
  • It computes raw throughput as ground output divided by runtime, then multiplies by operating efficiency to give an effective lb/hr rate. 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

  • effective grinder throughput: 151 lb / hr (headline result)
  • raw grinder throughput: 240 lb / hr
  • grinder operating efficiency: 63 %
  • grinder runtime: 3 hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Grinder Throughput calculator, set grinder operating efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.