Roof Calculator – Pitch

Roof Calculator is a clear, fast tool for working out roof pitch and materials. Built from the ground up for metric units and local building practice, with the correct terms throughout – not a rushed machine translation.

Enter the roof rise and span, and instantly see:
- Pitch in degrees, percent and ratio (e.g. 1:2.5)
- Slope length
- A clear cross-section drawing of your roof

The app also warns you if the pitch is too shallow for the chosen roofing material – felt, standing seam, profiled metal, tile or slate. A pitch that is too shallow can cause leaks or block the building permit, saving you from costly mistakes.

FREE:
- Pitch (degrees / % / ratio)
- Slope length
- Cross-section drawing – see your roof instantly, with measurements
- Minimum-pitch warning per material
- Gable and mono-pitch roofs
- Works offline

PRO (one-time purchase, no subscription):
- Roof area with eaves overhang
- Material quantity with waste allowance
- Batten quantity with on-center spacing
- Everything unlocks with a single one-time purchase – no monthly fee

Three languages: Finnish, Swedish and English.

Who it's for:
- Carpenters, roofers and builders on site
- Renovators and cottage owners planning a roof themselves
- Anyone who wants to understand what roof measurements actually mean

Roof Calculator works offline, so it's usable even on the roof without signal. No ads, no subscriptions.

Note: The values are indicative. Always check the roofing material's minimum pitch and quantities with the manufacturer, and permit requirements with your local building authority.