ペイント計算機

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はじめに

Paint Calculator — Liters of paint for a room with any coverage rate. Enter Wall length (m), Wall height (m), Number of walls, Coats, Coverage (m²/L) to get an instant, accurate result.

計算式

Total wall area = wall length × height × number of walls. Paint needed (L) = (area × coats) / coverage rate (m² per liter).

ステップごとの説明

Enter the Wall length (m).
Enter the Wall height (m).
Enter the Number of walls.
Enter the Coats.
Enter the Coverage (m²/L).
Click Calculate to see your result instantly.

実例

Example: With Wall length (m) = 12, Wall height (m) = 2.5, Number of walls = 4, Coats = 2, Coverage (m²/L) = 10, the Paint Calculator gives Liters: 24, Total Wall Area: 120.

よくある質問

What coverage rate should I use?

Check your specific paint can's label — 10 m²/L is a common average default.

Should I subtract door/window area?

For best accuracy, reduce your wall length/height inputs to account for large openings.

What inputs does the Paint Calculator need?

You'll need to provide: Wall length (m), Wall height (m), Number of walls, Coats, Coverage (m²/L). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the Paint Calculator?

The Paint Calculator applies the formula exactly as calculated — Total wall area = wall length × height × number of walls. Paint needed (L) = (area × coats) / coverage rate (m² per liter). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Paint Calculator free to use?

Yes, the Paint Calculator is completely free, requires no signup, and runs instantly in your browser.