How do you calculate coil labor cost?

Multiply the number of coils by the per-coil winding labor rate and divide by your capture factor, because paid time that does not become good coils is still paid, then add fixed setup and tooling cost. For 100 coils at $45 each and an 80% capture factor plus $250 setup, that is 100 × 45 × 0.80 + 250 = $3,850 total.

What is the per-coil labor cost in the default example?

$58.75 per coil. The $5,875 batch total divided by 100 coils gives $58.75, of which $56.25 is loaded winding labor and $2.50 is the spread of the $250 fixed setup.

What is a good capture factor for coil winding?

Well-run automated winding lines capture 85-92% of paid labor into good coils; hand-wound benches with frequent bobbin and wire-gauge changes often sit at 70-80%. An 80% factor, as used here, is a realistic mid-point for a mixed job shop.

Why include a fixed setup cost separately?

Setup, wire threading, tension calibration and first-article inspection happen once per batch regardless of quantity. Keeping it separate ($250 here) shows how per-coil cost falls as batch size rises, which is the core argument for consolidating small orders.

Coil labor cost vs total coil cost?

Labor cost covers only the winding-crew time and setup. Total coil cost also adds copper or aluminum wire, bobbins, magnet wire enamel, core material and varnish. On small high-turn-count coils, labor can exceed material; on large power coils, material dominates.

How do I lower per-coil labor cost?

Raise batch size to dilute the fixed $250, push the capture factor up by reducing wire breaks and re-winds, and move repetitive high-volume coils from hand benches to programmable winders. Each lever moves the per-coil figure independently.

Transformers, Coils & Magnetics Manufacturing calculator

Coil Labor Cost Calculator

Coil labor cost is the total winding, taping, lead-dressing and termination labor that goes into a batch of magnetic coils, plus the fixed setup and tooling burden spread across that batch. Coil shop estimators, transformer job-costers and production engineers use it to quote wound components and to decide whether a job runs on a hand-wound bench or a CNC winder. Winding is one of the most labor-intensive steps in magnetics, so a per-coil labor figure that is even a dollar off multiplies across thousands of pieces. This calculator applies a capture factor to account for the share of paid labor hours that actually turn into billable, first-pass-good coils.

What this calculator does

Coil labor cost is the total winding, taping, lead-dressing and termination labor that goes into a batch of magnetic coils, plus the fixed setup and tooling burden spread across that batch.
Use it when coil labor cost in transformers, coils and magnetics manufacturing is being put through a transformers, coils and magnetics manufacturing weighted-cost review.
It computes total coil labor cost as coils × labor rate × capture factor plus fixed setup cost, then divides by coil count for a per-coil figure.

Formula used

Coil Labor Cost cost = quantity × rate × capture factor + fixed cost
Per-unit coil labor cost = total cost ÷ quantity

Inputs explained

Coils wound per batch:
Winding labor rate per coil:
Direct labor capture factor:
Fixed setup and tooling cost:

How to use the result

Use it when quoting a wound-coil batch, comparing hand versus automated winding, or checking whether a running job is on labor budget.
The capture factor is a single blended number; it will not model a learning curve where the first 20 coils on a new bobbin take far longer than the last 80.

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 coil labor cost? Multiply the number of coils by the per-coil winding labor rate and divide by your capture factor, because paid time that does not become good coils is still paid, then add fixed setup and tooling cost. For 100 coils at $45 each and an 80% capture factor plus $250 setup, that is 100 × 45 × 0.80 + 250 = $3,850 total.
What is the per-coil labor cost in the default example? $58.75 per coil. The $5,875 batch total divided by 100 coils gives $58.75, of which $56.25 is loaded winding labor and $2.50 is the spread of the $250 fixed setup.
What is a good capture factor for coil winding? Well-run automated winding lines capture 85-92% of paid labor into good coils; hand-wound benches with frequent bobbin and wire-gauge changes often sit at 70-80%. An 80% factor, as used here, is a realistic mid-point for a mixed job shop.
Why include a fixed setup cost separately? Setup, wire threading, tension calibration and first-article inspection happen once per batch regardless of quantity. Keeping it separate ($250 here) shows how per-coil cost falls as batch size rises, which is the core argument for consolidating small orders.
Coil labor cost vs total coil cost? Labor cost covers only the winding-crew time and setup. Total coil cost also adds copper or aluminum wire, bobbins, magnet wire enamel, core material and varnish. On small high-turn-count coils, labor can exceed material; on large power coils, material dominates.

Last reviewed 2026-08-13.