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For hvac contractors

HVAC bidding software for independent contractors.

Win more HVAC jobs without spending evenings writing proposals. The AI generator drafts a complete install or replacement proposal — equipment + labor + ductwork + permits — in under 30 seconds. Pair with the truck-mode voice estimator to quote from the driveway.

Start freeOpen the HVAC calculator

Three problems HVAC contractors keep hitting.

Problem 1
Quoting a system replacement requires a 4-page proposal with equipment specs, labor breakdown, warranty terms — and most contractors are still writing it in Word.
ProJobCalc: AI Bid Proposal Generator writes the full 4-page document, branded with your company name + accent color, in 30 seconds.
Problem 2
The homeowner expects a callback the same day. You don't have time to sit down at a laptop after the consult.
ProJobCalc: Voice estimator (Sage) — walk the basement, narrate the scope, get a structured estimate by the time you're back in the truck.
Problem 3
Comparing equipment costs across Trane vs Lennox vs Carrier eats 20 minutes per quote.
ProJobCalc: Free HVAC estimator calculator with current 2025 equipment + labor benchmarks built in. Pick the system type, sq ft, zones, and ductwork — out comes a defensible starting price.

Free HVAC calculators.

No signup. No tier gate. The calculators below open straight to the math — save the result if you want, or just take the number and move on.

HVAC Installation Estimator
Estimate residential HVAC installs by system type, tonnage, and ductwork scope.
Labor Burden Calculator
Convert a wage rate into a true burdened cost including taxes, insurance, workers comp, and PTO.
Markup vs Margin Converter
Convert between markup % and margin %. Most contractors confuse them — this tool prevents the $10k-a-year math error.
Change Order Pricing Calculator
Price a change order with extra time, materials, and appropriate markup.
AC Tonnage Sizing Calculator
Quick AC sizing — climate zone × insulation × sun × windows × occupants → recommended tonnage (1, 1.5, 2, 2.5, 3, 3.5, 4, 5 ton).

Benchmarks (US averages, 2025).

Avg residential install
$5,000 – $12,000
Replacement turnaround
1–3 days
Typical margin
30–45%
Permit cost (US avg)
$120 – $350

These are reference ranges. Your actual pricing depends on local labor + material costs + your overhead. Use the calculator above for a defensible per-job number.

HVAC questions.

Does ProJobCalc work for both residential and light commercial HVAC?
Yes — the calculator + AI generator handle both. Residential is the default; for light commercial, plug in higher tonnage + add commercial-permit pricing in the line items.
Can I save my labor rate + standard markup so every quote starts pre-filled?
Yes. The brand profile (Pro tier) saves your hourly labor rate, default markup %, and standard payment terms so every new estimate inherits them — no re-entering numbers per quote.
What's the truck-mode voice estimator like for HVAC?
Walk the basement / mechanical room narrating: 'Three-ton air handler in the closet, 30 feet of trunk line to replace, no zoning, panel upgrade needed.' Sage extracts the structured line items, you review and send. Pro tier.

Ready to send hvac proposals faster?

Free tier is real. 21 calculators, unlimited estimates, up to 5 saved — no card to enter. If the AI proposal generator + voice estimator look useful, Pro is $19/mo with a 14-day trial.

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