Paint estimator
Work out how much paint to buy for a room — walls only. Add a price to get the cost.
You need about—
—paintable area
—paint required
Assumes ~10 m² coverage per litre per coat (typical matt emulsion) and subtracts standard doors (1.8 m²) and windows (1.5 m²). Buy one extra tin for touch-ups; textured walls drink more.