How do you calculate cost per coil?

Multiply lot size by variable cost per coil and by the capture factor, add fixed setup or tooling, then divide by lot size. With 100 coils at $45, an 80% capture factor and $250 setup, total captured cost is $3,850 and cost per coil is $38.50.

What is a good cost per coil for a heat exchanger shop?

There is no universal figure; it depends entirely on coil size, tube count, alloy and braze method. The point of the calculator is to compare scenarios, your $38.50 result against a target margin and your customer's expected price, not to a benchmark.

Why is my cost per coil higher on small lots?

Fixed setup and tooling get spread over fewer pieces. The $250 setup adds $2.50/coil across 100 coils but $25/coil across only 10, which is why minimum order quantities matter on tooled coil jobs.

What does the cost capture factor represent?

It is the share of theoretical variable cost you actually book against this job, here 80%. Use it to model scrap recovery, shared material, or partial absorption when not all variable cost lands on the lot.

Cost per coil vs price per coil?

Cost per coil ($38.50 here) is what it costs you to make; price is what you charge. Markup or margin sits on top of cost, so always quote above this number to cover overhead and profit.

How do I lower my cost per coil?

Increase lot size to dilute the $250 fixed cost, cut variable cost per coil through better fin yield or faster brazing, or reduce the capture factor only if scrap and rework genuinely improve.

Heat Exchanger, Coil & Radiator Manufacturing calculator

Cost Per Coil Calculator

Cost per coil is the fully-loaded manufacturing cost a heat exchanger shop carries for each finished coil once you spread fixed setup and tooling across the lot and add the variable material and labor that scales with volume. Estimators and plant managers use it to build defensible quotes, decide minimum order quantities, and judge whether a job clears margin. On a coil line where tube, fin stock, brazing and braze-test labor dominate, getting this number right is the difference between a profitable run and one that bleeds on every piece. It is the first number a sales engineer reaches for when a customer asks 'what does it cost to make one?'

What this calculator does

Estimate cost per coil or radiator assembly from build quantity, variable cost per unit, cost capture factor, and fixed setup or tooling cost.
Use it when quoting HVAC coils, radiators, condensers, evaporators, oil coolers, or heat exchanger assemblies and you need a fast unit cost build-up.
It computes the captured cost per finished coil by applying a capture factor to variable cost, adding fixed setup or tooling, then dividing by lot size.

Formula used

Total captured coil cost = coils in quote lot × variable cost per coil × cost capture factor + fixed setup or tooling cost
Estimated cost per coil = total captured coil cost ÷ coils in quote lot

Inputs explained

Coils in quote lot:
Variable cost per coil:
Cost capture factor:
Fixed setup or tooling cost:

How to use the result

Use it when quoting a coil lot, setting a minimum order quantity, or testing how amortized tooling changes unit cost as volume moves.
The capture factor is a blended estimate of how much variable cost you actually book against the job; it does not replace a true bill-of-materials cost roll or activity-based costing.

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).

Common questions

How do you calculate cost per coil? Multiply lot size by variable cost per coil and by the capture factor, add fixed setup or tooling, then divide by lot size. With 100 coils at $45, an 80% capture factor and $250 setup, total captured cost is $3,850 and cost per coil is $38.50.
What is a good cost per coil for a heat exchanger shop? There is no universal figure; it depends entirely on coil size, tube count, alloy and braze method. The point of the calculator is to compare scenarios, your $38.50 result against a target margin and your customer's expected price, not to a benchmark.
Why is my cost per coil higher on small lots? Fixed setup and tooling get spread over fewer pieces. The $250 setup adds $2.50/coil across 100 coils but $25/coil across only 10, which is why minimum order quantities matter on tooled coil jobs.
What does the cost capture factor represent? It is the share of theoretical variable cost you actually book against this job, here 80%. Use it to model scrap recovery, shared material, or partial absorption when not all variable cost lands on the lot.
Cost per coil vs price per coil? Cost per coil ($38.50 here) is what it costs you to make; price is what you charge. Markup or margin sits on top of cost, so always quote above this number to cover overhead and profit.

Last reviewed 2026-05-12.