How do you calculate cyclone efficiency?

Divide captured solids mass by inlet solids mass and multiply by 100. Capturing 880 lb of a 1,000 lb inlet gives 880 / 1,000 x 100 = 88% collection efficiency.

What is a good cyclone collection efficiency?

High-efficiency cyclones commonly run 85-95% on overall mass for typical industrial dusts, but only 50-90% on the fine sub-10-micron fraction. The example's 88% is solid as a pre-cleaner but leaves work for the downstream filter.

What does the efficiency gap to target tell me?

It's the points between measured and target performance. At 88% measured against a 90% target, the gap is 2 points, signaling a modest shortfall worth investigating before it overloads downstream media.

Why is my cyclone efficiency dropping?

Common causes are reduced inlet velocity, a worn or eroded cone, dust buildup, air in-leakage at the dust valve, or a shift to finer particles. Each lowers the centrifugal capture of small particles first.

Cyclone efficiency vs baghouse efficiency, what's the difference?

Cyclones use inertia and rarely exceed the low 90s on overall mass, struggling with fines. Baghouses and cartridge filters routinely exceed 99% across all sizes. Cyclones are best as a high-capacity pre-cleaner ahead of fabric filtration.

Does particle size affect this number?

Strongly. A cyclone might show 88% overall mass efficiency but far lower on fines. If your inlet shifts toward finer dust, overall efficiency and downstream filter life both fall even at the same flow.

Industrial Filtration, Separation & Dust Collection calculator

Cyclone Efficiency Calculator

Cyclone collection efficiency is the fraction of inlet solids a cyclone separator captures before the gas stream moves on to a baghouse or stack. Process engineers and air-quality teams use it to size pre-cleaners, protect downstream filters from heavy dust loading, and verify emissions compliance. A cyclone running a few points below target quietly overloads the bag or cartridge filter behind it, shortening media life and raising pressure drop. Measuring captured-versus-inlet mass turns a vague hunch about carryover into a number you can act on.

What this calculator does

Calculate cyclone collection efficiency from captured solids, inlet solids, and target collection efficiency.
Use it when checking cyclone separator performance, precleaner loading, cut point assumptions, or downstream filter protection.
It computes the percentage of inlet solids mass captured by the cyclone and the gap between that and your target efficiency.

Formula used

Cyclone collection efficiency = captured solids mass ÷ inlet solids mass × 100
Cyclone efficiency gap to target = target cyclone collection efficiency - cyclone collection efficiency

Inputs explained

Captured solids mass:
Inlet solids mass:
Target cyclone collection efficiency:

How to use the result

Use it during commissioning, after a process change in particle size or flow, or when downstream filters are loading faster than expected.
Mass-based efficiency is an overall number; it hides the fine-particle fractional efficiency that actually drives stack emissions and filter loading.

Common questions

How do you calculate cyclone efficiency? Divide captured solids mass by inlet solids mass and multiply by 100. Capturing 880 lb of a 1,000 lb inlet gives 880 / 1,000 x 100 = 88% collection efficiency.
What is a good cyclone collection efficiency? High-efficiency cyclones commonly run 85-95% on overall mass for typical industrial dusts, but only 50-90% on the fine sub-10-micron fraction. The example's 88% is solid as a pre-cleaner but leaves work for the downstream filter.
What does the efficiency gap to target tell me? It's the points between measured and target performance. At 88% measured against a 90% target, the gap is 2 points, signaling a modest shortfall worth investigating before it overloads downstream media.
Why is my cyclone efficiency dropping? Common causes are reduced inlet velocity, a worn or eroded cone, dust buildup, air in-leakage at the dust valve, or a shift to finer particles. Each lowers the centrifugal capture of small particles first.
Cyclone efficiency vs baghouse efficiency, what's the difference? Cyclones use inertia and rarely exceed the low 90s on overall mass, struggling with fines. Baghouses and cartridge filters routinely exceed 99% across all sizes. Cyclones are best as a high-capacity pre-cleaner ahead of fabric filtration.
Does particle size affect this number? Strongly. A cyclone might show 88% overall mass efficiency but far lower on fines. If your inlet shifts toward finer dust, overall efficiency and downstream filter life both fall even at the same flow.

Last reviewed 2026-08-12.