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Door Rough Opening Calculator helps contractors and tradespeople accurately size, spec, and estimate materials and systems.
Formule
RO Width = Door Width + 2 inches; RO Height = Door Height + 2.5 inches
Guide étape par étape
- 1Add framing clearance to door dimensions for rough opening
- 2Apply the formula using your project measurements
- 3Add required safety factors or waste allowances per code
Exemples résolus
Entrée
32 inch × 80 inch door
Résultat
RO = 34 inches wide × 82.5 inches tall
Erreurs courantes à éviter
- ✕Not applying code-required safety factors or derating
- ✕Forgetting to account for waste and cut losses in material estimates
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