HVAC cost calculator
Floor area, W per area ratio and installed price per kW: you get the capacity needed and total cost with extras.
Purchase quantity
30709.275 BTU/h
Net measurement: 30709.275 BTU/h
- Equipment and installation30709.275 BTU/h · £3,600.00
- Extras (removal, builder's work, permits)1 unit · £300.00
Indicative estimate: £3,900.00
Your prices per language/currency. Used when you enable “Use my prices” in calculators. My prices →
How it's calculated (visible formula)
kW = area × W/m² ÷ 1000; cost = kW × installed price per kW + extras
- Net geometric measurement, no waste.
- Adjustable waste % for cuts and breakage.
- Purchase rounded up to sellable units (boxes, bags, buckets, boards).
How to calculate it, step by step
- Work out capacity from area and ratio.
- Enter your installed price per kW for the system type.
- Add extras: removal, carpentry, electrical, permits.
- Review total and cost per area.
- Add margin and tax on the quote.
Worked example: 970 sq ft home at 100 W/m², $400 per kW
- 90 m² × 100 = 9 kW (2.6 tons)
- 9 × $400 = $3,600 + $300 extras
→ $3,900 in total (about $1,500 per ton).
Common mistakes
- Comparing quotes with different capacity or efficiency.
- Forgetting electrical work and condensate drain.
- Leaving out removal of old equipment.
Pro tips
- Offer ductless, ducted and heat pump options with cost and running cost.
- Sell yearly maintenance as a separate line.
- Check federal tax credits and utility rebates for heat pumps.
- Survey the site first — line-set routing changes the price.
From calculation to quote
Add labour, overhead and your margin, and generate the professional PDF.
FAQs
- How much does HVAC cost per ton?
- It varies widely by system type and region — enter your installed price.
- Is tax included?
- Add it with the labor and margin calculator.
- Are there rebates?
- Heat pumps often qualify for federal tax credits and utility rebates.
- Ductless or ducted — which costs more?
- Ducted costs more to install but distributes air better.
- How much does a heat pump cost installed?
- It varies with capacity and distribution; use your price per kW or ton.
- What does installed price include?
- Equipment, line sets, condensate drain, pad or brackets, start-up and labor.
Sources and standards
Maintained by Srikanta M · Formula v1.0.0 · Verified 2026-09-10 · Updated 2026-09-10 · Limits: quantity estimation, not structural design or site supervision.