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Home>Moving In>Decorating>Paint Calculator
Free tool - 30 seconds

How much paint do I actually need?

Enter your room dimensions and we'll work out the paint quantity, tin sizes and realistic cost - no maths required. Built for new build homes with flat white walls and honest defaults.

Your room

4m
3m
2.4m standard
2.4m
of 4
deducted from wall area
1
deducted from wall area
1
most new build ceilings are done
skirting + door frames
2 is honest for new builds
Affects cost only
Most popular next step

Get free quotes from local decorators

Most homeowners get 3 quotes back within 48 hours. Free, no obligation, and we only work with vetted trades.

Post a free job →

Email me this estimate + prep checklist

We'll send a copy of your 7.5L paint estimate for your 4m ×3m room - tin sizes, cost range and surface breakdown - plus a free decorating prep checklist written for new build homes. One email, no spam.

We'll only email you about this. Unsubscribe anytime.

Shop paint

Affiliate

Enough for your 7.5L estimate + touch-ups.

Dulux→

Shop matching tins

Mid-range - widely available

from £22/L

Farrow & Ball→

Shop matching tins

Premium - iconic colours

from £22.40/L

John Lewis→

Shop matching tins

Own-brand - great value

from £18/L

Affiliate links. We earn a small commission - it doesn't change the price you pay.

You'll need
7.5Lof paint

1 × 5L + 1 × 2.5L walls

Estimated costat £25/L
£188

Range across brands: £113 - £300

Where the paint goes

  • Walls30.3m²5.1L
Your room4m \u00D73m \u00D72.4m
3m4m2.4m
Painted wallsDoorWindow
!

Buy about 10% extra for touch-ups.

You'll want matching paint months later when you scuff a wall moving the sofa. Keep the leftover tin.

Your estimate
You'll need
7.5Lof paint

1 × 5L + 1 × 2.5L walls

Estimated costat £25/L
£188

Range across brands: £113 - £300

Where the paint goes

  • Walls30.3m²5.1L
Your room4m \u00D73m \u00D72.4m
3m4m2.4m
Painted wallsDoorWindow
!

Buy about 10% extra for touch-ups.

You'll want matching paint months later when you scuff a wall moving the sofa. Keep the leftover tin.

Shop paint

Affiliate

Enough for your 7.5L estimate + touch-ups.

Dulux→

Shop matching tins

Mid-range - widely available

from £22/L

Farrow & Ball→

Shop matching tins

Premium - iconic colours

from £22.40/L

John Lewis→

Shop matching tins

Own-brand - great value

from £18/L

Affiliate links. We earn a small commission - it doesn't change the price you pay.

Get free quotes3 in 48hrs - free

Keep reading

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Best paint colours for new builds

Room-by-room colour guide from real homeowners.

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Which works better in a new build?