Framing Calc: Rafter & Stairs

Framing Calc is a construction calculator built for carpenters, framers, and builders.

Rafters, hips and jacks, stairs, stud counts, concrete, blocks, roof area, and board feet - in feet, inches, and fractions, the way your tape reads. One-time purchase for Pro. No ads. No subscription.

- Common rafters: length, plumb cut, bird's mouth from pitch
- Hip/valley and jack rafters
- Stair stringers: rise, run, and step layout
- Stud counts at 16" or 24" o.c.
- Concrete volume, block counts, roof area, board feet
- Triangle / pitch solver
- Fraction-first input and results to 1/16"

Built to replace subscription construction calculators with honest one-time pricing.

Use it as a framing calculator, rafter calculator, stair calculator, or general construction calculator - for roof framing, deck building, stair layout, and estimating.