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Tools

Three calculators for the numbers behind a building. They run in your browser and work in metric and imperial.

  1. T1Roof pitch calculatorConvert x:12, degrees and percent; rafter length from run.
  2. T2Stair calculatorRisers, treads, run and angle, checked against US and UK limits.
  3. T3Room area calculatorRectangles, L-shapes, triangles and circles in m² and sq ft.