Wall Paint Coverage Calculator

Calculate the area covered by wall paint from a whole unit count and usable coverage per unit.

How to use Wall Paint Coverage Calculator

1. Enter Number of Units, One-Coat Coverage Per Paint Unit, Number of Coats. Use the matching measurement or purchase unit. 2. The coat count is a positive whole number. Enter one-coat coverage, then the tool divides by the requested coats to give the finished area. Choose a paint unit such as one tin or one litre and use its stated coverage per coat. Coverage depends on the product and surface; preparation, drying time and waste are separate. 3. Select Calculate or press Enter to see total area covered. 4. Select Select Copy result to copy the answer, or Reset to clear the form.

Why use this tool?

Use this calculator to plan paint for a measured wall area. Choose a paint unit such as one tin or one litre and use its stated coverage per coat. Coverage depends on the product and surface; preparation, drying time and waste are separate.

How the calculation works

Finished area = whole paint units × one-coat coverage per unit ÷ number of coats. The coat count is a positive whole number. Enter one-coat coverage, then the tool divides by the requested coats to give the finished area. Choose a paint unit such as one tin or one litre and use its stated coverage per coat. Coverage depends on the product and surface; preparation, drying time and waste are separate. Counts and comparisons use exact entered decimals. Other dimensions display up to six decimal places, with scientific notation for smaller nonzero results. Input and result magnitudes are limited to 9,007,199,254,740,991. Currency uses the selected currency’s minor unit.

Example

Wall Paint example: Eight example paint units, each covering 10 m² in one coat, cover 40 m² with 2 coats.

Practical tip

Read the selected paint’s coverage and coat instructions. Deduct openings from the measured wall area once, then add any chosen waste allowance separately.