Roof pitch, rafter and raked wall calculator

Enter the rise and run, or the pitch you want. You get rafter lengths, cut angles and every stud height for a raked wall.

I know the…

Pitch
31.0°
Rise
1,500 mm
Rafter (no overhang)
2,915 mm
Rafter + overhang
3,265 mm
Plumb cut
59.0°
Rise per metre
600 mm

Raked wall at this pitch

How it works

  1. 1Run is half the span, measured level from wall plate to the ridge centre.
  2. 2Add the eaves overhang to get the full rafter length to cut.
  3. 3Enter the roof length to count rafters and add them to your list.
  4. 4Use the raked wall section for gable or lean-to stud heights.

Material prices for this job

Now find the cheapest place to buy

Take your quantities across to Price Planter and compare them across UK builders' merchants — including whether splitting the order across two merchants works out cheaper.

Compare material prices

Quantities are typical trade allowances and a guide only — always confirm with your tradesperson or supplier before ordering.

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