Calculate feed-to-product ratio with clear engineering outputs. Export results, review formulas, and test sample values. Improve crusher selection, process checks, and reduction planning daily.
| Case | Feed Size | Product Size | Ratio | Percent Reduction |
|---|---|---|---|---|
| Primary Crush | 900 mm | 300 mm | 3.00 : 1 | 66.67% |
| Secondary Crush | 300 mm | 75 mm | 4.00 : 1 | 75.00% |
| Fine Crushing | 120 mm | 20 mm | 6.00 : 1 | 83.33% |
| Compact Duty | 60 mm | 15 mm | 4.00 : 1 | 75.00% |
Crusher Reduction Ratio = Feed Size ÷ Product Size
Percent Size Reduction = ((Feed Size − Product Size) ÷ Feed Size) × 100
Estimated Stages = log(Reduction Ratio) ÷ log(Typical Stage Ratio)
Use the same unit for feed size and product size. The ratio becomes more useful when both values represent the same size basis.
Crusher reduction ratio is a basic but powerful engineering metric. It compares the feed size with the product size after crushing. This value helps engineers judge how hard a crusher is working. It also helps teams compare different crushing stages in one circuit.
A higher reduction ratio means the machine is shrinking larger rock into much smaller output. A lower ratio means less size change. Both conditions can be acceptable. The correct value depends on the material, target product, liner condition, and circuit design.
This crusher reduction ratio calculator helps plant engineers, quarry managers, and process teams make faster checks. You can use it during design reviews. You can also use it during plant audits, daily production checks, and maintenance planning. The calculation is simple, but the decision behind it is important.
Feed size and product size must use the same unit. That keeps the ratio accurate. The calculator also shows percent size reduction. This gives a second view of crushing performance. A stage estimate is included too. It helps you understand how many ideal crushing steps may be needed when a typical stage ratio is known.
In practical crushing work, reduction ratio affects capacity, wear, and product consistency. If the ratio is too aggressive, liners may wear faster and energy demand may rise. If the ratio is too low, the circuit may need extra stages or recirculation. Good ratio control supports stable output.
This page is useful for preliminary engineering estimates. It is also useful for screening studies, training, and process documentation. Always combine ratio analysis with real material testing, crusher limits, and operating data. That gives a more reliable design decision and a more efficient plant.
It is the feed size divided by the product size. The ratio shows how much the crusher reduces material in one stage.
It helps evaluate crushing duty, stage performance, and circuit layout. It also supports better planning for wear, recirculation, and final product control.
Yes. You can use any unit, but feed and product sizes must use the same unit. Mixed units will produce the wrong ratio.
That creates an invalid crushing case. The calculator blocks it because a crusher must reduce size, not increase it.
It shows the percentage change from feed size to product size. This is helpful when you want a quick performance view beyond the ratio alone.
It estimates how many ideal crushing steps may be needed using your selected typical stage ratio. It is a planning aid, not a final plant design value.
No. Final selection should also consider material hardness, moisture, abrasiveness, capacity, gradation, machine limits, and operating conditions.
Yes. The page includes both CSV and PDF download options. Exporting makes it easier to document design reviews and operating checks.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.