屋根勾配計算機

共有リンク

はじめに

Roof Pitch Calculator — Roof pitch (x:12) and angle from rise & run. Enter Rise (in), Run (in) to get an instant, accurate result.

計算式

Pitch = (rise ÷ run) × 12, expressed as X:12 — the standard US roofing convention. Angle in degrees = arctan(rise ÷ run).

ステップごとの説明

Enter the Rise (in).
Enter the Run (in).
Click Calculate to see your result instantly.

実例

Example: With Rise (in) = 6, Run (in) = 12, the Roof Pitch Calculator gives Pitch X Per 12: 6, Angle Degrees: 26.5651.

よくある質問

What does a "6:12" pitch mean?

It means the roof rises 6 inches vertically for every 12 inches (1 foot) of horizontal run — a common moderate roof slope.

How is pitch different from angle?

Pitch (X:12) is a ratio used in construction; angle in degrees is the same slope expressed trigonometrically as arctan(rise/run) — both describe identical steepness.

What inputs does the Roof Pitch Calculator need?

You'll need to provide: Rise (in), Run (in). 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 Roof Pitch Calculator?

The Roof Pitch Calculator applies the formula exactly as calculated — Pitch = (rise ÷ run) × 12, expressed as X:12 — the standard US roofing convention. Angle in degrees = arctan(rise ÷ run). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Roof Pitch Calculator free to use?

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