Work out how much roofing and siding you need, what pitch your roof is, and what the job might cost. Each calculator turns your house measurements into squares, bundles, panels, boards or a cost breakdown.
Roofing
- Roofing calculator: roof area, squares and bundles of shingles, plus underlayment, drip edge and ridge cap.
- Roof pitch calculator: pitch from rise and run or from an angle, in x/12, degrees and percent.
- Metal roofing calculator: panels, panel length and trim for gable and shed roofs.
- Roof replacement cost calculator: installed price, tear-off, decking and fees in one breakdown.
Siding and trim
- Siding calculator: squares, vinyl boxes or fiber cement planks for walls and gables, plus cost.
- Board and batten calculator: batten spacing and lumber for accent walls or siding.
- Soffit calculator: soffit panels, J-channel, fascia and attic venting.
Which calculator should I use?
| Your question | Calculator |
|---|---|
| How many bundles of shingles do I need? | Roofing |
| What pitch is my roof? | Roof pitch |
| How many metal panels, and how long? | Metal roofing |
| What will a new roof cost? | Roof replacement cost |
| How much siding, and what will it cost? | Siding |
| How do I space board and batten? | Board and batten |
| How many soffit panels and vents? | Soffit |
Before you start
- You can measure most houses from the ground: measure the footprint and walls, then use the roof pitch for true roof area.
- Roof and ladder work is dangerous. Use proper fall protection, or leave steep and high work to professionals.
- Most areas need a permit for a new roof or new siding. Check with your building department.
- See How We Calculate for the formulas we use.
Roofing & Siding guides
Roofing & SidingRoof Pitch Chart: Common Roof Pitches Explained (4/12, 6/12, 8/12 and More)Roof pitch is how many inches a roof rises for every 12 inches it runs across, written as…Read the guide →7 min read
Roofing & SidingMetal Roof vs Shingles: Lifespan, Cost Factors, Pros and ConsA metal roof usually lasts 40 to 70 years, stands up well to wind, fire and snow, and…Read the guide →13 min read
Roofing & SidingHow Long Does a Roof Last? Shingles, Metal and MoreMost roofs last 15 to 30 years with asphalt shingles, 40 to 70 years with metal, and 50…Read the guide →9 min read