Roof costs
Quoted unit-rate cost range calculator
Calculate a low/high subtotal from measured quantity and quoted rates. Roof replacement, installation or gutter cleaning quoted per measured unit.
Try the calculation
Enter the measured quantity and low/high quoted rates for the same unit and scope. No local adjustment or extra cost is inferred.
Adjustable example. Change these illustrative inputs to match your task, then recalculate. Reset restores the example and its result.
Understand the result
How this calculation works
A roof replacement range applies two quoted rates to one measured quantity.
Steps
- Choose square feet or linear feet, then enter the quantity and matching low and high rates.
- Keep scope and units identical.
The form starts with the worked example below. Change its values and selections to match your task; Reset restores the example.
Formula
low total = quantity × low rate; high total = quantity × high rate.
Variables and units
- Rate unit (selected option)
- Options: Square feet; Linear feet. Initial selection: Square feet.
- Measured quantity (selected unit)
- Required. Use a positive value. Starting example: 2000. Replace it for your task.
- Low quoted rate ($ / selected unit)
- Required. Use a positive value. Starting example: 5.09. Replace it for your task. Use a quote or documented rate with its scope and date.
- High quoted rate ($ / selected unit)
- Required. Use a positive value. Starting example: 6.66. Replace it for your task. Use the same unit and scope as the low rate.
What the result means
The range mirrors the rates you provide; it does not localize, tax or add unlisted scope.
Worked example
Inputs: Measured quantity = 2000; Low quoted rate = 5.09; High quoted rate = 6.66; Rate unit = Square feet.
Calculation: 2,000 sq ft at $5.09–$6.66 = $10,180–$13,320.
Result: 10,180–13,320 $.
Compare linear-foot quote rates
Inputs: Rate unit = Linear feet; Measured quantity = 80; Low quoted rate = 6; High quoted rate = 8.
Calculation: For 80 linear feet at $6 to $8 per foot, the same-unit range is $480 to $640. No roof area conversion is made.
Result: 480–640 $.
Frequently asked questions
Can the unit be linear feet?
Yes, when the quote is explicitly per linear foot.
Should removal be added here?
Only if the entered rates include it; the form does not infer extra scope.
Are the rates current everywhere?
No. Use the source date and your quote context.