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Rafter Length Calculator helps contractors and tradespeople accurately size, spec, and estimate materials and systems.
Formel
Rafter Length = √(Rise² + Run²) + Overhang
Steg-för-steg-guide
- 1Use Pythagorean theorem with rise and run, add overhang
- 2Apply the formula using your project measurements
- 3Add required safety factors or waste allowances per code
Lösta exempel
Ingång
8 ft rise, 16 ft run, 1.5 ft overhang
Resultat
Rafter = √(64+256) + 1.5 = 17.9 + 1.5 = 19.4 ft
Vanliga misstag att undvika
- ✕Not applying code-required safety factors or derating
- ✕Forgetting to account for waste and cut losses in material estimates
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