Grain Milling, Dry Bulk Food & Feed Handling calculator

Auger Rate Calculator

Calculate auger or screw conveyor rate attainment by comparing actual conveyed material with the planned conveying amount and target attainment. Use it when a screw conveyor, auger, or feeder is suspected of limiting grain, meal, pellet, flour, or ingredient flow to a bin, mixer, mill, or bagging line.

What this calculator does

  • Calculate auger or screw conveyor rate attainment by comparing actual conveyed material with the planned conveying amount and target attainment.
  • Use it when a screw conveyor, auger, or feeder is suspected of limiting grain, meal, pellet, flour, or ingredient flow to a bin, mixer, mill, or bagging line.
  • Measures whether an auger or screw conveyor moved the planned material quantity.

Formula used

  • Auger rate attainment = actual auger conveyed weight ÷ planned auger conveyed weight × 100
  • Auger rate gap to target = target auger rate attainment - auger rate attainment

Inputs explained

  • Actual auger conveyed weight: Enter tons moved by the auger, screw conveyor, or feeder during the measured period.
  • Planned auger conveyed weight: Use expected tons for the same product, screw speed, runtime, and route.
  • Target auger rate attainment: Use the required rate attainment from production plan, equipment standard, or bottleneck review.

How to use the result

  • Use for feed-rate checks, screw RPM changes, bridging issues, bin discharge reviews, and bottleneck troubleshooting.
  • This calculator is an estimating and planning tool. Results can change with grain type, commodity grade, test weight, bulk density, moisture percentage, temperature, fines content, particle size, screen condition, hammer or roller wear, mill gap, aspiration, dust load, bin geometry, hopper angle, angle of repose, bridging or ratholing, conveyor loading, belt speed, screw fill, bucket spacing, pneumatic conveying velocity, mixer fill level, ingredient scale accuracy, bag weight, pallet pattern, labor coverage, sanitation requirements, allergen controls, rework policy, shrink history, utility rates, and actual plant operating data. Validate food-safety, feed-safety, combustible-dust, structural, regulatory, and safety-critical decisions with qualified process, quality, maintenance, engineering, and EHS experts.

Common questions

  • What information do I need before using the Auger Rate? Use actual tons conveyed, planned tons, and target attainment for the same conveyor and period.
  • What does the result mean? The result shows actual conveying performance as a percent of plan and the gap versus target.
  • When is the result only an estimate? This calculator is an estimating and planning tool. Results can change with grain type, commodity grade, test weight, bulk density, moisture percentage, temperature, fines content, particle size, screen condition, hammer or roller wear, mill gap, aspiration, dust load, bin geometry, hopper angle, angle of repose, bridging or ratholing, conveyor loading, belt speed, screw fill, bucket spacing, pneumatic conveying velocity, mixer fill level, ingredient scale accuracy, bag weight, pallet pattern, labor coverage, sanitation requirements, allergen controls, rework policy, shrink history, utility rates, and actual plant operating data. Validate food-safety, feed-safety, combustible-dust, structural, regulatory, and safety-critical decisions with qualified process, quality, maintenance, engineering, and EHS experts.
  • What decision can I make from the result? Use it to adjust screw speed, inspect flighting, improve bin discharge, schedule maintenance, or change upstream feed rate.

Last reviewed 2026-05-12.