How do you calculate coil yield in stamping?

Divide the material that becomes parts by total coil consumed. This calculator reports the scrap side: 8 units of scrap out of 250 consumed is a 3.2% scrap rate, leaving roughly 96.8% converted to parts. The gap to a 95% target is shown as 91.8 points.

What is a good coil yield percentage?

For blanking and simple progressive parts, 70-85% material utilization is common; tightly nested or slit-optimized layouts can exceed 90%. Anything under 65% usually means the strip layout or web width deserves a redesign.

Why does coil yield matter so much?

Because raw material is typically the single largest cost in a stamped part. Improving yield by a few points on a high-volume program can save more than any labor or speed gain, since every pound of skeleton scrap is metal you paid full price for.

What is the difference between coil yield and scrap rate?

They are two sides of the same ratio. Scrap rate is offal divided by coil consumed; coil yield is parts divided by coil consumed. A 3.2% scrap rate corresponds to about a 96.8% material yield.

How can I improve coil yield?

Tighten the strip layout, reduce web and carrier width, use two-out or angled nesting, and match coil width to the blank. Feed the improved scrap ratio back into this calculator to confirm you've closed the gap to target.

Does sellable scrap count against yield?

It still lowers material yield because that metal didn't become a part, but it softens the cost impact via scrap credit. Track the weight here and apply your scrap-credit price separately to see net material cost.

Sheet Metal Stamping & Press Lines calculator

Coil Yield Calculator

Coil yield tells you how much of every incoming coil of steel or aluminum actually leaves the stamping line as parts versus how much ends up as offal, skeleton and slugs. In high-volume stamping, material is often 60-70% of piece cost, so even a one-point yield swing moves real money across a year. Stamping engineers, buyers and plant controllers watch coil yield to justify strip-layout changes, negotiate scrap-credit terms, and decide whether a nesting improvement pays for the tooling change. This calculator frames yield as the scrap fraction of total coil consumed and shows the gap to your target so you know how much material is still on the table.

What this calculator does

Coil yield tells you how much of every incoming coil of steel or aluminum actually leaves the stamping line as parts versus how much ends up as offal, skeleton and slugs.
Use it when coil yield in sheet metal stamping and press lines needs a clean rate and gap-to-target you can put on a tier board.
It computes the scrap or offal as a percentage of total coil weight consumed and shows how many points that sits below your target yield benchmark.

Formula used

Coil Yield rate = affected amount ÷ total amount
Gap to target = target rate - calculated rate

Inputs explained

Scrap or offal weight from coil:
Total coil weight consumed:
Target coil yield benchmark:

How to use the result

Use it when evaluating a strip layout, auditing a supplier coil, or building the material-cost line of a stamping quote.
It works on weight ratios only — it doesn't distinguish sellable scrap (which earns a credit) from unrecoverable offal, so pair it with your scrap-credit rate for true cost impact.

Current U.S. benchmarks

The producer price index for steel mill products stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. Quotes priced off last quarter's material cost miss this move.
U.S. iron and steel imports ran $2.1B in May 2026 (Census International Trade). The U.S. ran a trade deficit of $0.4B in the category that month. Import volumes are the pressure gauge behind tariff and reshoring decisions.
The U.S. has 53,790 fabricated metal products establishments employing about 1,441,471 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate coil yield in stamping? Divide the material that becomes parts by total coil consumed. This calculator reports the scrap side: 8 units of scrap out of 250 consumed is a 3.2% scrap rate, leaving roughly 96.8% converted to parts. The gap to a 95% target is shown as 91.8 points.
What is a good coil yield percentage? For blanking and simple progressive parts, 70-85% material utilization is common; tightly nested or slit-optimized layouts can exceed 90%. Anything under 65% usually means the strip layout or web width deserves a redesign.
Why does coil yield matter so much? Because raw material is typically the single largest cost in a stamped part. Improving yield by a few points on a high-volume program can save more than any labor or speed gain, since every pound of skeleton scrap is metal you paid full price for.
What is the difference between coil yield and scrap rate? They are two sides of the same ratio. Scrap rate is offal divided by coil consumed; coil yield is parts divided by coil consumed. A 3.2% scrap rate corresponds to about a 96.8% material yield.
How can I improve coil yield? Tighten the strip layout, reduce web and carrier width, use two-out or angled nesting, and match coil width to the blank. Feed the improved scrap ratio back into this calculator to confirm you've closed the gap to target.

Last reviewed 2026-05-12.