How do you calculate cut length yield?

Divide the in-spec cut count by the total cuts produced. With 242 in spec out of 250 total, that is a 96.8% yield for this run, which you then compare against your target.

What is the gap to target here?

The gap is your target minus the calculated rate. Against a 95% target the run shows -1.8 points, i.e. the yield clears the goal set for the line by 1.8 points.

What is a good cut length yield?

High-volume precut lines aim for scrap well under 2-3% of pieces. The 3.2% scrap balance on 250 cuts is borderline, worth a look at the saw stop position and measuring wheel calibration.

Why track defect count as a rate instead of raw pieces?

Eight scrap cuts sounds trivial until you know it came from 250, making it 3.2% of the run. A rate lets you compare shifts, machines and lots on the same footing and trend drift over time.

What causes cut length defects?

A slipping measuring wheel, worn saw stop, encoder drift, or wire spring-back on stiff conductors. A rising rate on this calculator is the signal to check those before the scrap pile grows.

Cut length yield vs first-pass yield, what's the difference?

This measures only length-related scrap at the cut station. First-pass yield spans every downstream defect. Use cut length yield to isolate the cut-and-measure step from the rest of the line.

Wire, Cable & Conductor Manufacturing calculator

Cut Length Yield Calculator

Cut length yield tracks what fraction of cut-to-length wire or cable pieces come off the line off-spec, so you can see how a cut-and-coil or precut operation is really performing against a target. Short cuts, out-of-tolerance lengths and end-strip defects turn into scrap or rework, and on high-volume automotive and appliance harness feeds those small percentages add up to real copper cost. Production leads and quality engineers use this rate to flag a drifting cut saw or measuring wheel and to hold the line to a yield target. It converts a raw scrap count into a rate you can trend and act on.

What this calculator does

Cut length yield tracks what fraction of cut-to-length wire or cable pieces come off the line off-spec, so you can see how a cut-and-coil or precut operation is really performing against a target.
Use it when cut length yield in wire, cable and conductor manufacturing needs a clean rate and gap-to-target you can put on a tier board.
It divides the affected cut count by total cuts to produce a rate, then reports the gap between that rate and your target.

Formula used

Cut length yield = in-spec lengths ÷ total lengths × 100
Gap to target = target rate - calculated rate

Inputs explained

In-spec cut lengths produced:
Total cut lengths produced:
Target cut-length yield rate:

How to use the result

Use it for a shift or lot review of a cut-to-length operation, to trend scrap on a cut saw, or to check whether a run met its yield target.
With small batches a single defect swings the rate hard, and the calculator counts pieces equally regardless of length, so a few long scrap cuts cost more copper than the rate alone shows.

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 542.853 (BLS, Jul 2026), up 52.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,543 per tonne (IMF via FRED, Jul 2026).
The U.S. has 5,397 electrical equipment and appliances establishments employing about 369,437 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate cut length yield? Divide the in-spec cut count by the total cuts produced. With 242 in spec out of 250 total, that is a 96.8% yield for this run, which you then compare against your target.
What is the gap to target here? The gap is your target minus the calculated rate. Against a 95% target the run shows -1.8 points, i.e. the yield clears the goal set for the line by 1.8 points.
What is a good cut length yield? High-volume precut lines aim for scrap well under 2-3% of pieces. The 3.2% scrap balance on 250 cuts is borderline, worth a look at the saw stop position and measuring wheel calibration.
Why track defect count as a rate instead of raw pieces? Eight scrap cuts sounds trivial until you know it came from 250, making it 3.2% of the run. A rate lets you compare shifts, machines and lots on the same footing and trend drift over time.
What causes cut length defects? A slipping measuring wheel, worn saw stop, encoder drift, or wire spring-back on stiff conductors. A rising rate on this calculator is the signal to check those before the scrap pile grows.

Last reviewed 2026-08-12.