About CalcSlope
CalcSlope helps homeowners, learners and tradespeople explore roof geometry: calculate a single slope or compare two roof sides, directly in your browser.
Our tools
Find pitch, angle and lengths for one slope, or compare two roof sides from their rise and run.
Accuracy
Calculations use right-triangle geometry and unit conversions. Rounded results depend on your input measurements; they are not a structural assessment.
Geometry disclaimerLanguages
Use the same tools in English, German, French or Dutch, with localized number formatting.
German, French and Dutch wording is awaiting independent human review.
How it works
Choose a tool, enter known measurements and units, then read the calculated triangle. Pin only the values you want to keep on this device. No account is needed.
Public contact details are awaiting verification.
Explore CalcSlope tools