Roofing squares and costLive calculation
Roofing job estimate
Free roofing cost calculator
Calculate in your browser
Enter measured roof area, waste allowance and your material and labor rates per roofing square to estimate job quantity and cost.
Free, no sign-up, and the entered values stay in your browser.
Formula
How the calculation works
Enter measured roof area, waste allowance and your material and labor rates per roofing square to estimate job quantity and cost.
Roofing squares = roof area × (1 + waste %) ÷ 100. Total = squares × (material rate + labor rate).Use actual roof measurements and local supplier quotes. Pitch, tear-off, decking, flashing, ventilation, disposal, permits and access can change the final cost.
Use the result
Move from calculation to a customer document.
Confirm the measurements, rates, tax treatment and project scope before relying on an estimate. Keep the calculation with the customer record, then place the verified figures in an itemized estimate, quote or invoice.
These browser calculations support planning and pricing. They do not replace field measurements, supplier quotations, payroll, accounting, tax, lending or professional advice.
Frequently asked questions
Questions about free roofing cost calculator
What is one roofing square?
One roofing square represents 100 square feet of roof surface. Measure actual sloped roof area rather than using floor area alone.
Does the calculator determine roof pitch?
No. Enter a roof area that already reflects the measured slope and geometry. Complex roofs should be divided into measured sections.
What costs should be added to a roofing estimate?
Consider tear-off, underlayment, flashing, ventilation, decking repairs, disposal, delivery, equipment, permits, tax, overhead and profit.
Related resources
Continue the same business task.
Create a roofing estimate
Continue from the calculation with a related Pocket Invoice tool, template or practical guide.
Open resource →Construction invoice template
Continue from the calculation with a related Pocket Invoice tool, template or practical guide.
Open resource →Calculate contractor markup
Continue from the calculation with a related Pocket Invoice tool, template or practical guide.
Open resource →