I'm measuring
Roof pitch calculator
Turn rise and run into pitch, angle and slope, and get the multiplier that converts a footprint into roof area.
Open the pitch calculatorUnderstand what your home project should cost before you hire.
CostSquared helps you work through the numbers behind a roofing project: how big the roof is, how steep it is, and what a contractor's quote actually includes. Every result shows its formula, and when there isn't enough evidence to give a price, we say so.
No account needed. Pasted quotes aren't stored or logged, and calculator inputs stay in the page address.
Where are you starting?
Pick the job in front of you. Each tool does one thing and tells you what it can't do.
I have a quote
Quote checker
Enter or paste the line items. We check the arithmetic and quantities, and list questions to ask about commonly required items the quote doesn't mention.
Check a quoteI'm just starting
Roofing guides
Plain explanations of how roofs are measured and quoted, with diagrams and a worked example you can check against your own house.
Read the guidesWhat each tool can and can't answer
Knowing the limits matters as much as the result. Nothing here replaces an inspection by a contractor.
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Prices appear only when the evidence holds up
A price range is only useful if you can see where it came from. We publish one only when it meets written thresholds, and every range shows its sources, date, area and confidence.
Published price ranges today
None yet
We're still collecting documented prices. Until a range qualifies, our tools work from geometry and the numbers you enter.
- 3 or morevalid, documented observations behind any range
- 3 of 4US Census regions represented before a range is called national
- 6 monthsmaximum age of observations for a medium-confidence materials range
- 24 hourscooling-off after review, before anything is published
Guides
Each guide has one job and a worked example you can check with the calculator.
How we judge a number
Six questions we ask of every price before it can appear on the site. The methodology explains each one in full.
Source
Where the figure came from, whether we may use it, and the evidence we kept.
Geography
The area it applies to: state, census division, region or national, always labeled.
Units
Per square, per bundle or per linear foot, converted only where the conversion is exact.
Scope
Materials only, labor only or installed, and what's included or left out.
Sample size
How many independent observations stand behind the range.
Recency
When the prices were observed, shown with every range.
Common questions
Can CostSquared tell me whether my roofing quote is fair?
No. The quote checker checks the arithmetic, compares quantities with your roof size and flags commonly required items the quote doesn't mention. Judging a price needs documented local prices for the same scope, and we don't have enough of those yet.
Why aren't published roofing price ranges available yet?
Because none has met our evidence thresholds. A range needs enough recent, documented observations from several sources and regions, and a review before it is published. We'd rather show you how to compare quotes than a number we can't back up.
Do I need to climb onto my roof to measure it?
No, and we recommend you don't. You can measure the footprint from the ground and find the pitch from inside the attic. The measuring guide shows how.
What does a 6/12 roof pitch mean?
The roof rises 6 inches for every 12 inches of horizontal distance. That is an angle of about 26.6 degrees, or a 50% slope.
Are calculator results contractor bids?
No. Results are informational. A contractor prices the job after seeing the roof, and may find conditions such as damaged decking or extra layers that change the scope.
Is anything I enter saved?
Pasted quotes are processed and discarded: they aren't saved to a database or written to our logs. Calculator inputs are kept in the page address so you can bookmark a result, which means they can appear in our hosting provider's standard access logs. The privacy policy has the details.