Garage doors
Garage Door Spring Cost Calculator
Prices spring replacement, the most dangerous routine job in residential trades.
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
Time, the springs and the call-out. The labour is short for someone equipped and trained and the parts are inexpensive, so the price largely reflects skill and risk rather than hours. Springs are specified by wire size, inside diameter and length, and those together determine how much lift they provide; a spring that is not matched to the door's weight and travel will not balance it however well it is fitted. Torsion springs are wound on a shaft above the door under very high tension, and they are replaced with winding bars, in a controlled sequence.
What moves the number
- Correct spring specification for the door's weight and height, not just a similar looking spring.
- Whether both springs are being replaced, which they should be on a two spring door.
- Cycle rating, since a higher cycle spring costs more and lasts proportionally longer.
- Whether shaft, bearings, cables or drums also need replacing while it is apart.
Where this one goes wrong
This is the job that injures and kills people who attempt it without the right tools. A torsion spring stores enough energy to break bones and worse, it is under tension even with the door open, and it is wound and unwound with proper winding bars, never screwdrivers or improvised rods. A bar that slips comes out at speed. If you are not trained and equipped for it, this is the work to refer rather than attempt. Replace springs in pairs on a two spring door: they have the same cycle history, so the second will fail soon after the first, and the second call costs the customer more than doing both now. Check the cables and bearings at the same time, since a snapped cable can drop the door.
Before you quote
- Use proper winding bars and the correct sequence, or refer the job.
- Match wire size, inside diameter and length to the door.
- Replace both springs on a two spring door, and inspect cables and bearings.
Where the rules come from
Questions
About this calculator
Can I replace a garage door spring myself?
It is genuinely dangerous and the usual advice is not to. A torsion spring holds enough energy to cause serious or fatal injury, it is under tension even with the door open, and it requires proper winding bars used in the right sequence. This is the clearest case in residential work for calling somebody equipped for it.
Should both springs be replaced if only one broke?
On a two spring door, yes. Both have the same cycle history, so the intact one is close to the end of its life and will typically fail within a short period. Replacing both now costs a little more in parts and saves a second call-out and another failure.
Why does my door need a specific spring?
Because the spring has to counterbalance the door's actual weight over its actual travel, and that comes from wire size, inside diameter and length together. A spring that merely looks similar will leave the door heavy or springy, which is unsafe and destroys openers. It is calculated, not matched by eye.
How long should springs last?
They are rated in cycles, and one cycle is one open and close. A standard spring on a door used several times a day reaches its rating in a handful of years, while a higher cycle spring costs more and lasts proportionally longer. For a busy household the upgrade is usually worth it.
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 2 h.
- People needed. Enter your own figure; the page starts at 1.
- Labour rate charged ($). Enter your own figure; the page starts at $125.
- Parts and materials ($). Enter your own figure; the page starts at $180.
- Call-out or diagnostic fee ($). 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 | 2 h |
| People needed | 1 |
| Labour rate charged | $125 |
| Parts and materials | $180 |
| Call-out or diagnostic fee | $95 |
| Sales tax | 0% |
What comes out
| Result | Value |
|---|---|
| Estimated total main result | $525 |
| Labour | $250 |
| Before tax | $525 |
| Sales tax | $0 |
About $525: $250 of labour, $180 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 |
|---|---|
| $63 | $401 |
| $94 | $463 |
| $125 example above | $525 |
| $188 | $651 |
| $250 | $775 |
Every other input is held at the example value while this one changes, which is not how a real job behaves. Treat it as a guide to which number matters most, not as five separate quotes.
What each figure means
- Hours on site (h)
- Measured in h, between 0 and 400, starting at 2 h.
- People needed
- A number, between 0 and 40, starting at 1.
- Labour rate charged ($)
- A money amount, starting at $125.
- Parts and materials ($)
- A money amount, starting at $180.
- Call-out or diagnostic fee ($)
- 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.