Paint Calculator Widget | Calculator Campus

Start with the interior single-room flow. Switch modes for a ceiling, a whole exterior, or a primer coat; open advanced options for measured openings, extra material, a custom coverage rate, gables, or metric output.

Room or building length (required)

Room or building width (required)

Wall height (required)

Coats (required)

Surface / coverage (required)

Add openings, gables, and other options Hide additional options

Custom coverage rate (required)

Opening area to subtract (sq ft)

Extra material allowance (%)

Number of gable ends

Gable base width

Gable peak height

Show metric (litres / m²)

Rounded quantity plan

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Paintable area —

Calculated paint —

Show calculation details Hide calculation details

Rounded quantity plan

Whole gallons —

Extra quarts —

Container-size planning example —

Quart vs gallon —

Calculation basis

Coverage rate used —

Coats used —

Coverage basis —

Notes —