Roof measurement
Measured quantity sum calculator
Add separately measured quantities in one unit. Measured roof-plane areas, gutter-run lengths or manually counted fittings.
Try the calculation
Add quantities you have already measured or counted. Use one unit and count each physical section once; geometry is not 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
Measured quantity totals are a deliberate addition of up to four quantities in one unit.
Steps
- Choose square feet, linear feet or fittings.
- Enter each measured section once and leave unused optional rows blank.
The form starts with the worked example below. Change its values and selections to match your task; Reset restores the example.
Formula
total = q1 + q2 + q3 + q4.
Variables and units
- Quantity unit (selected option)
- Options: Square feet; Linear feet; Fitting count. Initial selection: Square feet.
- Quantity 1 (selected unit)
- Required. Zero is accepted. Starting example: 600. Replace it for your task.
- Quantity 2 (selected unit)
- Optional; blank contributes zero. Zero is accepted. Starting example: 400. Replace it for your task. Leave blank if unused.
- Quantity 3 (selected unit)
- Optional; blank contributes zero. Zero is accepted. Starting example: 125. Replace it for your task. Leave blank if unused.
- Quantity 4 (selected unit)
- Optional; blank contributes zero. Zero is accepted. Starting example: 0. Replace it for your task. Leave blank if unused.
What the result means
The total reflects what you entered. It does not infer roof geometry, perimeter or fitting type.
Worked example
Inputs: Quantity unit = Square feet; Quantity 1 = 600; Quantity 2 = 400; Quantity 3 = 125; Quantity 4 = 0.
Calculation: For 600, 400 and 125 sq ft: 600 + 400 + 125 = 1,125 sq ft.
Result: 1,125 sq ft.
Add counted fittings
Inputs: Quantity unit = Fitting count; Quantity 1 = 0; Quantity 2 = 2; Quantity 3 = 3.
Calculation: Choose fittings and add 2 plus 3. The total is 5 whole fittings; an unused first group may be zero.
Result: 5 fittings.
Frequently asked questions
Can I mix feet and square feet?
No. Choose one unit and enter comparable quantities.
What does a blank optional row mean?
It contributes zero. Enter zero explicitly only when the field permits that quantity.
Can fittings be fractional?
No. Fitting quantities must be whole counts.