Roof Pitch Calculator

Type in the rise and run and get the pitch, the angle, the true roof area and the shingle shopping list. No sign-up. The working is shown under every number.

Your project

in

How much the roof climbs…

in

Standard is a 12 in run. A 6 in rise over 12 in run is a “6/12 pitch”.

ft
ft

Roof area is worked out for a simple gable roof (two slopes) using the slope multiplier. Hips, valleys, dormers and overhangs add area — add a few percent for those.

Your prices — put your store's prices here

These prices are examples to start from, not live prices. Type your store's prices and the total updates instantly.

Shopping list

ItemBuyCost
Estimated total$0.00

Pitch, angle, multiplier, rafter length and roof area lines are measurements, so they show $0.00 — the cost lines are the shingles and underlayment.

Estimate only — not a guarantee. Mistakes are possible, so always check the quantities with your supplier or a builder before you buy or build.

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Disclaimer — please read before you build

These figures are planning estimates only — not a guarantee and not professional advice. Mistakes are possible, including through an error in this calculator. Always check the quantities, sizes, spacings and depths with your supplier, a licensed builder, and your local building code before you buy materials or start work. The owner of this site accepts no responsibility or liability for any loss, cost, damage, injury, wasted material or failed inspection that results from using these estimates. Prices are examples to start from, not live prices or quotes.