Earth Science & Energy
Jaw Crusher Reduction Ratio ($80\%$ Passing Size $F_{80} / P_{80}$)
Calculate jaw crusher reduction ratio ($80\%$ passing size $f_{80} / p_{80}$) using the stated engineering or scientific relationship and adjustable field inputs.
Preparing your result…
What this calculator does
Calculates Jaw Crusher Reduction Ratio ($80\%$ Passing Size $F_{80} / P_{80}$) using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Reduction ratio = F₈₀ ÷ P₈₀
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Size reduction ratio=feed F80/product P80 with both sizes in the same unit; F80 and P80 are the sizes at80% cumulative passing.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • This F80/P80 definition is dimensionless and distinct from maximum-feed-size/gap or F100/P100 conventions. Require P80>0 and normally F80≥P80 for crushing. It does not by itself select crusher capacity, motor power or a suitable operating reduction ratio.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Feed F80 (mm) | Product P80 (mm) | Reduction ratio |
|---|---|---|---|
| Worked example | 500 | 100 | 5 :1 |
| Half the amounts | 250 | 50 | 5 :1 |
| Double the amounts | 1,000 | 200 | 5 :1 |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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