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.