Painting Quote Calculator: Estimate a Job in Two Minutes
What should you quote for that job? Not a per-metre guess — an estimate built the way professionals price: hours from real production rates, prep from the surface condition, paint rounded to real tins. The free painting quote calculator takes area, coats and condition and hands back labour hours, paint quantity and a defensible price range.
The method: hours × your rate, not $/m² guesswork
Ask ten painters what a job is worth per square metre and you'll get ten numbers — because a single $/m² rate flattens everything that actually moves the price: condition, coats, detail, access. Professionals price from hours instead, and the arithmetic is simple:
- Painting hours = area × coats ÷ a production rate. On a standard repaint, one painter covers roughly 15 m² (160 ft²) an hour — faster on big open walls, slower on fiddly trim and cutting in.
- Prep hours = area ÷ a prep rate that depends on the surface condition (the table below).
- Labour price = total hours × your charge-out rate.
- Materials = paint from the measured area, rounded up to the tins you can actually buy, plus your materials margin.
That's the whole engine. The calculator applies it with defaults a professional would recognise, and every assumption is stated on the results screen rather than hidden.
Condition drives prep — and prep is a rate, not a percentage
Preparation is genuinely 30–50% of total labour on a normal repaint, and more on weathered exteriors. The right way to price it is as a production rate — how many square metres of that condition one painter can prep in an hour. A rate is checkable against experience in a way a percentage never is: "sound-condition prep runs 25 m² an hour" is a claim a painter can accept or reject.
| Condition | What it looks like | Prep rate (approx.) |
|---|---|---|
| Near-new | Very good condition — light sand and dust down, minimal filling | ≈ 37 m²/hr (400 ft²/hr) |
| Typical repaint | Sound condition — wash, sand, spot-fill, dust down | ≈ 25 m²/hr (270 ft²/hr) |
| Weathered | Older surface — more filler work, minor repairs, some scraping | ≈ 15 m²/hr (160 ft²/hr) |
| Rough | Neglected or peeling — extensive filling, spot priming | ≈ 9 m²/hr (100 ft²/hr) |
A slower rate means more prep hours. And note what's missing from the arithmetic: the coat count. Prep happens once, before the first coat — a three-coat job doesn't need 50% more sanding than a two-coat job on the same wall. Pricing prep per coat is one of the quiet ways painting quotes drift wrong.
Paint: spread rate, wastage, and real tins
A typical wall paint spreads at about 12 m² per litre per coat (roughly 490 ft² per gallon). Two coats on 120 m² of surface is 240 ÷ 12 = 20 litres — before wastage. Cutting in, roller and tray loss, and touch-ups add about 10%, and then the number rounds up to containers you can actually buy: you can't purchase 22.0 litres, you buy a 20 L drum and a 2 L tin.
The calculator does all three steps. For the fuller treatment — different paint types, spray wastage, coverage by surface texture — see how much paint do I need or use the dedicated paint coverage calculator.
Why you get a range, not one number
The honest uncertainty in a two-minute estimate isn't the arithmetic — it's how fiddly the job turns out to be. Cutting in around fixtures, awkward access, detailed trim: on the production ladder, that's the difference between a careful job and an efficient one. So the calculator prices the same job half a production step faster and half a step slower and hands you the band between them.
A range like that wins conversations — it's a credible opening figure on the phone or at a first walk-through. What it can't do is be a contract price, because the things that decide where in the band the job lands (trim metres, ceiling heights, access, condition up close) need a real measure. That's the difference between an estimate and a quote.
What a quick estimate deliberately leaves out
The calculator states its exclusions rather than pretending to precision: access equipment, high ceilings, detailed trim runs, and tax are all outside a two-minute estimate. Those are exactly the items a surface-by-surface measure catches — and they're where under-quoted jobs lose their margin. If the job is real, measure it: how to quote a painting job walks the full process.
Related guides
- How to quote a painting job
- Painting production rates
- Markup vs margin for painters
- Painter hourly rate calculator
- Painting quote calculator (free tool)
FAQ
How do painters estimate a quote?
From production rates: painting hours = area × coats ÷ rate (≈15 m²/hr on a standard repaint), plus prep hours from the condition, times the charge-out rate, plus materials. The calculator applies exactly that method.
What do painters charge per square metre?
It varies too much with condition and detail to price from directly — most professionals price from hours. A two-coat, sound-condition repaint typically lands between $12 and $25 per m² of painted surface; weathered or detailed work can be double.
How much should prep add to the quote?
Prep is 30–50% of labour on a normal repaint, more on weathered exteriors. It's priced as a rate by condition (≈25 m²/hr for sound condition) and it happens once — the coat count doesn't multiply it.
How much paint per square metre?
About 12 m² per litre per coat for typical wall paint. Add ~10% wastage, then round up to real container sizes.
Why a range and not one number?
The real uncertainty is how fiddly the job turns out. The calculator prices the same job half a production step faster and slower — a defensible band. A single contract-ready figure needs a real measure.
Is the calculator free?
Yes — free at surfacely.io/tools/painting-quote-calculator, no sign-up. The same method powers Surfacely's full quoting engine when you measure a real job.