Roof pitch calculator
Rise over run to pitch, angle and the slope multiplier that corrects your plan area.
rise / run · degrees · multiplier
Roof takeoff, worked out
Squares, bundles, pitch and installed cost — calculators and field guides for the people who measure the roof before they price it.
13 tools · 23 guides
The calculators
Every one shows its takeoff underneath the answer, and prints as a sheet.
9 of 13 shown
Roof square calculator
Footprint and pitch to roofing squares, with the waste factor the roof shape actually needs.
sq ft → squares · waste %
Shingle bundle calculator
Squares to bundles, starter course, ridge cap and nails — the whole material takeoff.
squares → bundles · pieces
Roof replacement cost calculator
Squares, material and pitch to an installed cost range with the takeoff behind it.
squares · $ / square · range
Roof area calculator
Plan dimensions and pitch to true roof area for gable, hip and shed shapes.
ft × ft · pitch → sq ft
Roofing estimate template
A printable bid sheet: line items, waste, labour, warranty terms and a total.
line items · $ total
Metal roof cost calculator
Squares and panel system to an installed range, with the panel and trim takeoff.
squares · panel type · range
Roof inspection checklist
A printable walk of the roof by zone: ridge, field, valleys, flashing, gutters, penetrations.
6 zones · printable
Attic ventilation calculator
Net free area at 1:150 and 1:300, split intake and exhaust, and the vent count it takes.
sq ft → NFA in² · vent count
Measure, take off, bid
01
Measure
Footprint on the ground, pitch from the attic. Two numbers, and the multiplier that joins them.
02
Take off
Squares, then waste for the roof's shape, then bundles, starter, cap and nails.
03
Bid
Installed cost per square, tear-off by the layer, a deck contingency, and a sheet you can print.
Every covering, one table
Installed cost per square, service life and weight — the three numbers a material choice actually turns on.
| Material | $ / square installed | Service life | Weight / square |
|---|---|---|---|
| 3-tab asphalt | $350 – $590 | 15–20 yr | ≈200 lb |
| Architectural asphalt | $475 – $1,875 | 22–30 yr | ≈240 lb |
| Metal panel | $825 – $2,225 | 40–70 yr | ≈110 lb |
| Concrete tile | $825 – $1,400 | 50+ yr | 600–1,100 lb |
| Wood shake | $590 – $1,750 | 25–40 yr | ≈350 lb |
| Synthetic slate | $900 – $1,500 | 50 yr | ≈250 lb |
| Natural slate | $1,500 – $3,000 | up to 200 yr | 1,000–2,000 lb |
Four things a roof asks you
Takeoff & estimating
Turn a roof into squares, squares into bundles, bundles into a number you can put on a bid.
6 tools · 4 guides
Roofing materials
Shingle, metal, tile and slate measured the same way: installed cost per square, service life, weight and warranty.
1 tools · 6 guides · 3 compares
Repair & storm damage
Find the failure, price the fix, and know where the line between repair and replacement sits.
2 tools · 7 guides · 1 compares
Bids & the job
The paperwork around the roof: bids, contracts, permits, claims — and how the work is actually laid.
4 tools · 6 guides
Start with these
The six guides the rest of the site links back to most.
Takeoff & estimating
What a roof replacement actually costs
Installed cost per square by material, what moves the number, and a worked takeoff.
11 min
Takeoff & estimating
Roof pitch chart: pitch, angle and multiplier
Every common pitch from 1/12 to 12/12 with its angle, area multiplier and walkability.
7 min
Takeoff & estimating
What is a roof square?
The trade's only unit: 100 square feet, and how squares become bundles and dollars.
6 min
Takeoff & estimating
Roofing labour cost per square
Crew production rates and what pitch, storey height and tear-off do to the labour line.
8 min
Roofing materials
Asphalt shingle cost per square
Material-only and installed cost for 3-tab, architectural and designer shingles.
9 min
Roofing materials
Metal roof cost by panel type
Exposed-fastener, standing seam and stone-coated steel against installed cost per square.
10 min
Get the takeoff sheets.
Every calculator on this site prints as a sheet you can put in a file or hand to a customer. Nothing is stored, nothing is sent, and there is nothing to sign up for.