top guessing how much paint to buy. Paint Calculator gives you exact results in seconds. Enter room dimensions → add doors and windows → pick your paint brand → get cans needed and total cost. Supports Dulux, Tikkurila, Behr, Sherwin-Williams, Benjamin Moore, Marshall with pre-filled coverage rates. ✔ Wall & ceiling calculator ✔ Doors & windows deduction ✔ Cost estimator with waste factor ✔ Calculation history ✔ Metric & Imperial (m²/L and ft²/gal) ✔ Works fully offline ✔ Free on Android