Roofing and Framing Calculators
These roofing calculator and framing tools work out roof pitch, rafter length, spiral staircase dimensions, and insulation needs.
Spiral Staircase Calculator
This spiral staircase calculator works out the number of steps, riser height, and tread angle from…
Open calculator Roofing and FramingRafter Length Calculator
This rafter length calculator finds the true length of a common rafter from the roof’s run…
Open calculator Roofing and FramingInsulation Calculator
This insulation calculator estimates how many rolls or batts you need to cover a wall, floor,…
Open calculator Roofing and FramingRoof Pitch Calculator
This roof pitch calculator finds your roof’s slope from its rise and run, then converts it…
Open calculatorAbout Roofing and Framing Calculators
These roofing calculator and framing tools work out roof pitch, rafter length, spiral staircase dimensions, and insulation needs. Choose a tool below for an instant result with the formula and a worked example.
Roof and framing geometry is easy to miscut. These tools apply the pitch and length relationships so your rafters, stairs, and insulation come out right the first time.
Calculators in this category
Frequently Asked Questions
What can I calculate for roofing and framing?
Roof pitch and slope, rafter length, spiral staircase dimensions, and insulation requirements. Each tool covers one task with its formula and an example.
Are these tools free to use?
Yes. Every calculator on this page is free, needs no signup, and works in your browser on mobile and desktop.
Do the tools show the pitch formula?
Yes. Each page states the equation, defines rise, run, and span, and includes a numeric example.