Paint Calculator
Estimate the amount of paint required to cover your walls based on room dimensions and door/window exclusions.
Real-time Results
Total amount of paint needed
Estimated standard containers needed
Surface and Coverage Details
Calculation breakdowns for areas, coat multiplication and paint rates
| Item | Value |
|---|---|
| Gross Wall Area | 45.0 ㎡ |
| Doors & Windows Exclusions | 5.0 ㎡ |
| Net Single Coat Area | 40.0 ㎡ |
| Total Paint Surface Area | 80.0 ㎡ |
| Estimated Paint Coverage | 10 ㎡/L |
Why Choose Paint Calculator
Quickly estimate how much paint to buy for your home remodeling. Calculate wall surface areas, exclude doors and windows, and plan for multiple coats in liters or gallons.
- ✓Dynamically subtracts door and window dimensions.
- ✓Supports standard 5-liter metric buckets and 1-gallon imperial cans.
- ✓Calculates multiple coat passes instantly.
How to Calculate
- 1Enter the Advanced Options relevant to your calculation.
- 2Configure any Measurement Unit System to customize the output.
- 3Review the detailed results with itemized breakdowns where applicable.
- 4Use the summary totals and recommendations to make informed decisions.
- 5Adjust inputs as needed to compare different scenarios and optimize your plan.
Frequently Asked Questions (FAQ)
How much area does 1 liter of paint cover?
Generally, 1 liter of paint covers about 10 square meters (107 sq ft) of a smooth wall surface for a single coat.
Why should I buy 10% extra paint?
Purchasing slightly extra paint allows you to account for spills, paint absorbed by rollers/trays, and leaves material for future touch-ups.
Authoritative References & Sources
U.S. Census Bureau — Housing & Construction Data
View SourceEPA — Fuel Economy & Transportation Data
View SourceBureau of Labor Statistics — Consumer Expenditure Surveys
View SourceRelated Calculators
More calculators selected by category and topic.