Crusher Throughput Calculator
Crusher throughput is the mass of material a crusher processes per unit time, normally expressed in tonnes per hour (t/h).
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Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- To size output from a nameplate rate: enter the feed rate (t/h), optionally a utilisation (%) to allow for stoppages, and the operating hours to see tonnes over the period.
- To back-check actual performance: leave feed rate blank and instead enter tonnes processed (t) and operating hours (h) — the tool returns the realised average throughput.
- Leave utilisation blank to assume 100% (continuous feed) when you want the theoretical maximum.
How it works
Crusher throughput is the mass of material a crusher processes per unit time, normally expressed in tonnes per hour (t/h). From a known feed rate the tool computes effective throughput = feed rate × utilisation, then tonnes over the period = effective throughput × operating hours. Utilisation (0–100%) discounts the nameplate rate for choke-feed variation, blockages, belt trips and minor stops.
When you supply tonnes processed and operating hours instead, the tool inverts the relationship: average throughput = tonnes ÷ operating hours. That realised rate already embeds any downtime inside the recorded hours, so utilisation is not re-applied. All denominators (hours) are guarded — a zero or negative value returns an error rather than infinity, and utilisation is bounded to a valid 0–100% range.
Worked example
Crusher fed at 600 t/h, 90% utilisation, 18-hour day. With a feed rate of 600 t/h and 90% utilisation, effective throughput = 600 × 0.90 = 540 t/h. Over an 18-hour operating shift the plant processes 540 × 18 = 9,720 t.
Common mistakes
- Applying utilisation twice — do not discount a feed rate that is already a realised average. Use utilisation only against a nameplate/design t/h figure.
- Mixing scheduled hours with operating hours. Throughput per operating hour is not the same as per scheduled hour; use the hours the crusher was actually fed.
- Reading the result as guaranteed capacity. Feed size, moisture, hardness, closed-side setting and screening all move real throughput — treat this as a planning estimate, not an OEM guarantee.
Frequently asked questions
Is throughput the same as the crusher's rated capacity?
No. Rated (nameplate) capacity is an ideal figure under specified feed conditions. Real throughput is usually lower because of feed-size variation, moisture, hardness and stoppages — which is what the utilisation input and the tonnes-over-time output help you estimate.
Why doesn't utilisation apply when I enter tonnes and hours?
When you give actual tonnes processed over actual operating hours, the resulting average rate already accounts for whatever slowdowns and stops happened in that window. Applying a utilisation factor on top would double-count the losses.
What time period does the tonnes output cover?
Whatever operating hours you enter. Put 24 for a full production day, the shift length for a shift, or a monthly operating-hour total to estimate monthly tonnes.
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