Reference confidence · observedAt 2026-08-27. USD and US customary units are the base; Europe and Australia convert into their published profiles.
Read the methodology01 The home improvement cost desk
Buy enough paint for the whole job.
Use this free, transparent tool to plan the material order before you buy or compare a quote.
02 Start with the scope
Buy enough paint for the job.
Estimate gallons or litres from the surface you know, then adjust for coats, coverage, openings, primer and waste.
Paint quantity calculator
03 Trust the number, not the guess
Read the model card.
Every result carries the version, date and boundary of the assumptions behind it. That keeps a useful planning range from looking like a promise.
Paint quantity is paintable area × coats ÷ reference coverage, with primer, openings and waste shown as separate assumptions rather than hidden in the result.
Example: A 700 sq ft area at two coats and 350 sq ft per gallon is 4 gallons before waste; add the allowance after checking the product label.
See data sourcesTaxes, permits, access, code, disposal, site conditions and local availability can change a written bid. Use the result to scope the conversation.
Why Renovation Range exists03 Read the result
Buy enough paint for
the whole job.
Start with the surface you can measure, then make coats, coverage, openings, primer and waste visible.
Coverage is a product assumption.
For a known paintable area, multiply the area by the number of coats and divide by the product coverage. For a room measured by floor area, use a transparent wall-area proxy and adjust it when you know the actual walls.
Porous, dark or textured surfaces can use more product. The result is a planning quantity; the label and a small test area should win when they differ.
04 Make the estimate legible
No black box.
Just better context.
A useful estimate does not pretend to be a bid. It gives you a sensible range, names the assumptions, and makes the next conversation less lopsided.
Three numbers beat one.
Low, expected, and high show uncertainty honestly — especially when labor and site conditions vary.
Show your work.
Materials, labor, gates, removal, and permits stay separate, so you can see what changed.
Local is a promise.
We only call a number local when the underlying data is local. Otherwise, we label it a baseline.
05 Before you sign anything
Turn a ballpark
into a better question.
Bring the breakdown with you. A good contractor will be able to tell you which line items are realistic for your property and why.
See the checklist01Is removal and haul-away included?+
Ask whether demolition, loading, disposal fees and final cleanup are included or priced separately. A low quote can move quickly when haul-away is missing.
02What does the labor line cover?+
Have the contractor spell out preparation, installation, equipment, cleanup and the crew’s scope. Compare the same work line by line, not just the final total.
03Are permits, gates, and site conditions scoped?+
Confirm permit responsibility, gate count and hardware, access, grading, drainage, excavation and any conditions that were not visible from the initial measurement.
04What could move this range after the site visit?+
Ask what the contractor still needs to verify: exact quantities, soil, utilities, access, material availability, taxes, disposal and code requirements. Those are the honest range movers.
07 Read the fine print
The short version.
Is this a contractor quote?
No. It is a reference estimate built from the assumptions shown on the page. A site visit and written scope are still the final word.
Why does location change the number?
Labor, material availability, permits, and site conditions vary by market. The model shows the factor and the assumptions so you can pressure-test a quote.
Do you sell my information?
This tool does not require an email or phone number to show a result. If you allow analytics, we use Google Analytics to understand usage; calculator input values and contact details are not sent.