Windows & doors
Window Estimate Calculator
Builds a window quote, where the measurement is the part that costs money if it is wrong.
Result
A planning estimate, not a quote. Access, the age of the equipment, what is found once it is opened up and local labour rates all move the real figure, sometimes a long way.
Get a Free Business AuditHow the calculation works
Hours times crew times rate, plus units and materials, plus the call-out, then tax. Used as an estimating tool, the discipline that matters is measurement. Replacement windows are made to order to the dimensions you supply, and a unit that arrives the wrong size is not returnable, so a measuring error is the full cost of the window plus the delay plus the second visit. Measure each opening individually rather than assuming a house is consistent, take the smallest of several measurements across the opening, and record which window each measurement belongs to.
What moves the number
- Per-opening measurement, since openings in the same house are frequently not identical.
- Lead time on made to order units, which sets the schedule rather than your availability.
- Whether the quote covers finish work, disposal and any rot repair.
- Deposit and ordering terms, because a made to order unit is a committed cost once released.
Where this one goes wrong
Do not measure one window and order twelve. Houses settle, openings were not built identically, and a set of units ordered from a single measurement produces several that do not fit and are not returnable. Measure each one, measure width and height in more than one place, and use the smallest figure. Get the customer to sign off the sizes and the products before you release the order, since a made to order window is a sunk cost the moment it goes into production. It is also worth confirming the egress and safety glazing position at quoting time rather than discovering at installation that a unit cannot legally go in the opening it was ordered for.
Before you quote
- Measure every opening separately, in more than one place, and use the smallest.
- Get sizes and products signed off before releasing the order.
- Confirm egress and safety glazing requirements at quoting, not at fitting.
Questions
About this calculator
Why can't I measure one window and order the rest to match?
Because openings in the same house are rarely identical. Framing tolerances and settlement mean nominally matching windows differ by enough to matter on a made to order unit. Since those units are not returnable, one measurement applied to a whole house is an expensive assumption.
How should an opening be measured?
Width and height in several places, taking the smallest of each, because an opening is seldom perfectly square. Recording which measurement belongs to which opening matters as much as the numbers, since a correct set of sizes attached to the wrong windows causes the same problem as measuring wrongly.
What happens if a window arrives the wrong size?
It is generally not returnable, because it was manufactured to your dimensions. The cost is the unit, the lead time on a replacement and a second installation visit, which is why measurement discipline is worth more than speed at the quoting stage.
The formula
total = hours x people x rate + parts + call-out, then sales tax
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How to use this calculator
- Hours on site (h). Enter your own figure; the page starts at 16 h.
- People needed. Enter your own figure; the page starts at 1.
- Labour rate charged ($). Enter your own figure; the page starts at $92.
- Parts and materials ($). Enter your own figure; the page starts at $4,200.
- Call-out or diagnostic fee ($). Enter your own figure; the page starts at $95.
- Sales tax (%). Leave at zero if you are quoting before tax.
The result updates as you type, so you can try a figure, see what it does to estimated total, and change it back. Nothing you enter is sent anywhere or saved.
A worked example
These are the figures the calculator opens with. Every number in the results column below is produced by the same calculation the page runs, so you can follow it through before putting your own figures in.
What goes in
| Input | Value |
|---|---|
| Hours on site | 16 h |
| People needed | 1 |
| Labour rate charged | $92 |
| Parts and materials | $4,200 |
| Call-out or diagnostic fee | $95 |
| Sales tax | 0% |
What comes out
| Result | Value |
|---|---|
| Estimated total main result | $5,767 |
| Labour | $1,472 |
| Before tax | $5,767 |
| Sales tax | $0 |
About $5,767: $1,472 of labour, $4,200 of parts and a $95 call-out.
How sensitive the answer is
Holding everything else steady and changing only labour rate charged, this is what happens to estimated total. It is worth knowing which of your inputs the answer actually hinges on, and which barely move it.
| Labour rate charged ($) | Estimated total |
|---|---|
| $46 | $5,031 |
| $69 | $5,399 |
| $92 example above | $5,767 |
| $138 | $6,503 |
| $184 | $7,239 |
Every other input is held at the example value while this one changes, which is not how a real job behaves. Treat it as a guide to which number matters most, not as five separate quotes.
What each figure means
- Hours on site (h)
- Measured in h, between 0 and 400, starting at 16 h.
- People needed
- A number, between 0 and 40, starting at 1.
- Labour rate charged ($)
- A money amount, starting at $92.
- Parts and materials ($)
- A money amount, starting at $4,200.
- Call-out or diagnostic fee ($)
- A money amount, starting at $95.
- Sales tax (%)
- Leave at zero if you are quoting before tax.
What the results tell you
| Result | What it is |
|---|---|
| Estimated total | The headline result. A money figure. |
| Labour | A money figure. |
| Before tax | A money figure. |
| Sales tax | A money figure. |
Estimating is the easy part
The jobs you never hear about cost more than the ones you mis-measure. BDEVY builds the marketing, systems and automation that bring them in.