How do you calculate fiber recovery rate?

Divide recovered fiber by total fiber input and multiply by 100. With 8 recovered out of 250 input, the rate is 3.2%, far below a 95% target and a 91.8-point gap.

What is a good fiber recovery rate?

Efficient recovery loops on a save-all or reject system routinely hit 90-98%. The 3.2% shown here would signal a nearly failed recovery stage or a mislabeled sample, not normal operation.

Why is my fiber recovery rate so low?

Either recovered count is genuinely tiny relative to input, or the inputs are measured on different bases. In the example, 8 of 250 gives 3.2%, so verify both figures are the same fiber stream and unit before acting.

Fiber recovery rate vs pulp yield?

Yield measures fiber out of raw wood or furnish overall; recovery rate is narrower, tracking one reclaim loop such as broke or rejects. A mill can have good overall yield yet a poor recovery loop.

What does the gap to target mean here?

It is recovery minus target in points. At 3.2% against a 95% target the gap is 91.8 points, an alarm that this loop is losing almost all its fiber.

How can I improve fiber recovery?

Tune save-all consistency, reduce reject-screen open area losses, and re-feed reclaimed stock upstream. Verify measurement first, since a 3.2% reading often signals a metering error rather than true loss.

Wood & Paper Manufacturing calculator

Fiber Recovery Rate Calculator

Fiber Recovery Rate captures how much fiber a mill reclaims from a given stream — broke, reject, or repulped stock — relative to the total fiber fed into that loop. Pulp mill and recycling-line engineers rely on it to gauge screening, cleaning, and repulper efficiency, since every point of lost fiber is raw material sent to sludge. Low recovery drives up furnish cost and effluent loading at the same time. This calculator returns the recovery percentage and the exact point gap to your target so losses are visible and actionable.

What this calculator does

Estimate fiber recovery rate for wood and paper manufacturing using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.
Use it when fiber recovery rate in wood and paper manufacturing needs a clean rate and gap-to-target you can put on a tier board.
It divides recovered fiber by total fiber input, multiplies by 100 for a percentage, then subtracts the target to report the gap in points.

Formula used

Fiber recovery rate = fiber recovery rate count ÷ total fiber recovery rate population × 100
Fiber recovery rate gap to target = fiber recovery rate - target fiber recovery rate

Inputs explained

Recovered Usable Fiber (Reclaimed):
Total Fiber Input to Recovery Loop:
Target Fiber Recovery Rate:

How to use the result

Use it when auditing a repulper, reject screen, or save-all, or when a furnish cost spike points to fiber leaving the loop.
A raw count ratio does not distinguish long saleable fiber from fines; a high recovery rate that includes unusable fines can flatter true yield.

Current U.S. benchmarks

The producer price index for lumber and wood products stands at 280.994 (BLS, May 2026), up 4.2% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The producer price index for paperboard and containers stands at 276.831 (BLS, May 2026), up 8.8% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 13,899 wood product manufacturing establishments employing about 432,255 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate fiber recovery rate? Divide recovered fiber by total fiber input and multiply by 100. With 8 recovered out of 250 input, the rate is 3.2%, far below a 95% target and a 91.8-point gap.
What is a good fiber recovery rate? Efficient recovery loops on a save-all or reject system routinely hit 90-98%. The 3.2% shown here would signal a nearly failed recovery stage or a mislabeled sample, not normal operation.
Why is my fiber recovery rate so low? Either recovered count is genuinely tiny relative to input, or the inputs are measured on different bases. In the example, 8 of 250 gives 3.2%, so verify both figures are the same fiber stream and unit before acting.
Fiber recovery rate vs pulp yield? Yield measures fiber out of raw wood or furnish overall; recovery rate is narrower, tracking one reclaim loop such as broke or rejects. A mill can have good overall yield yet a poor recovery loop.
What does the gap to target mean here? It is recovery minus target in points. At 3.2% against a 95% target the gap is 91.8 points, an alarm that this loop is losing almost all its fiber.

Last reviewed 2026-05-12.