How do you calculate an HVAC ductwork quote price?

Multiply the number of units by direct cost per unit and your overhead-and-margin factor to get variable cost, then add fixed project costs. With 80 units at $58, a 128% factor, and $1,800 fixed, the total quoted price is $7,739.20.

What does the overhead and margin factor of 128% mean?

It is a multiplier applied to direct cost: 1.28 covers shop overhead, freight, and profit on top of the bare $58 material-and-labor cost, pushing each unit's variable contribution to about $74.24 before fixed costs are spread in.

Why include fixed project costs separately?

Engineering, submittals, and PM do not scale with duct count, so loading them into the per-unit factor distorts pricing on large jobs. Here the $1,800 fixed cost is added once, then spread across all 80 units.

What is the per-unit sell price in this example?

Total quoted price of $7,739.20 divided by 80 units is $96.74 per unit — the figure to compare against historical sell prices for similar fittings or sections.

Quote price vs. cost-plus estimating — what's the difference?

Cost-plus adds a flat profit dollar amount to cost; this method applies a percentage factor that scales markup with cost, which protects margin when material prices spike on galvanized or stainless duct.

How do I improve quote accuracy?

Calibrate the overhead factor against closed jobs quarterly and never bury engineering or submittal labor in the per-unit rate — keep it in the fixed bucket so it survives quantity changes.

HVAC Ductwork, Air Handling & Mechanical Products calculator

Ductwork and AHU Quote Price Calculator

The Quote Price calculator turns a takeoff of duct sections, fittings, and air-handling units into a defensible bid number. It loads each unit's direct material-plus-labor cost with an overhead-and-margin factor, then adds the fixed project costs that a fabrication shop too often forgets to bill — engineering hours, submittal drawings, and project management. Estimators at HVAC sheet metal fabricators and mechanical contractors use it to move from a SMACNA takeoff to a quoted price fast, and to back into a per-unit sell rate they can compare against past jobs. Getting the overhead factor right is the difference between winning unprofitable work and pricing yourself out of the bid.

What this calculator does

Build a total quote price for a ductwork fabrication, air handling unit supply, or mechanical product contract. Combine unit count, material and labor cost per unit, an overhead and margin rate, and fixed project cost to get total quoted price and per-unit sell price.
Use this when preparing a bid for a ductwork fabrication and installation contract, an air handler supply contract, or a mechanical room package. Enter the number of units or sections in scope, your cost per unit including material and labor, an overhead and margin percentage, and fixed project costs such as engineering, submittals, and project management. The result is your quoted total price and the sell price per unit that you can check against competitive targets.
It computes a total quoted price and a per-unit sell price by applying an overhead-and-margin factor to direct unit costs and adding fixed project costs.

Formula used

Variable quoted cost = units × direct cost per unit × overhead and margin factor
Total quoted price = variable cost + fixed project costs
Per-unit sell price = total quoted price ÷ number of units

Inputs explained

Duct sections, fittings, or AHU units in scope:
Direct cost per unit (material plus labor):
Overhead and margin factor:
Fixed project costs (engineering, submittals, PM):

How to use the result

Use it when converting a duct and AHU takeoff into a customer-facing bid, or when checking whether a per-piece price covers loaded cost plus markup.
The single overhead-and-margin factor lumps shop burden, freight, and profit together, so it cannot show your actual gross margin unless you decompose that factor separately.

Current U.S. benchmarks

Industrial electricity averages 8.66 cents per kWh across the U.S. (EIA, Apr 2026), up 5.5% from a year earlier. Energy-intensive steps carry this directly into unit cost.
U.S. housing starts run at 1,177k per year (Census, May 2026), down 8.7% from a year earlier, the demand driver for building products.

Common questions

How do you calculate an HVAC ductwork quote price? Multiply the number of units by direct cost per unit and your overhead-and-margin factor to get variable cost, then add fixed project costs. With 80 units at $58, a 128% factor, and $1,800 fixed, the total quoted price is $7,739.20.
What does the overhead and margin factor of 128% mean? It is a multiplier applied to direct cost: 1.28 covers shop overhead, freight, and profit on top of the bare $58 material-and-labor cost, pushing each unit's variable contribution to about $74.24 before fixed costs are spread in.
Why include fixed project costs separately? Engineering, submittals, and PM do not scale with duct count, so loading them into the per-unit factor distorts pricing on large jobs. Here the $1,800 fixed cost is added once, then spread across all 80 units.
What is the per-unit sell price in this example? Total quoted price of $7,739.20 divided by 80 units is $96.74 per unit — the figure to compare against historical sell prices for similar fittings or sections.
Quote price vs. cost-plus estimating — what's the difference? Cost-plus adds a flat profit dollar amount to cost; this method applies a percentage factor that scales markup with cost, which protects margin when material prices spike on galvanized or stainless duct.

Last reviewed 2026-05-12.