Garage Door: Spring Life in Years

All versions

A torsion spring is rated for a set number of open-close cycles, not a set number of years. Divide the rating by how many cycles the door runs a day, then by 365, and you get the expected life in years for that household.

Quick formula: Rated cycles divided by cycles per year:

=ROUND(B2/(C2*365),1)

A 10,000-cycle spring run six times a day lasts about 4.6 years.

Functions used (tap for the full reference guide):

ROUND

The example

Three doors, each with a spring cycle rating and how many times it runs per day.

	A	B	C	D
1	Door	Rating	Per day	Years
2	Family	10000	6	4.6
3	Empty nester	10000	3	9.1
4	Home business	20000	8	6.8

The formula

Cycles per day times 365 is cycles per year; the rating divided by that is years:

=ROUND(B2/(C2*365),1) // rated cycles / (cycles per day x 365), to one decimal

How it works

Work the denominator first:

C2*365 turns cycles per day into cycles per year.
B2/(...) divides the spring's rated cycles by the yearly usage to get years of life.
ROUND(...,1) trims it to one decimal — a service-friendly “about 4.6 years.”
One cycle is one open plus one close, so a door used to leave and return counts as two, not four.

Higher-cycle springs (15,000 or 20,000) cost a little more but last proportionally longer — worth it on a door that runs all day.

Try it: interactive demo

Interactive

Enter the spring's cycle rating and how many cycles the door runs per day.

Cycle rating

Cycles per day

Variations

Upgrade to a high-cycle spring

See the life at a 20,000-cycle rating for the same usage.

=ROUND(20000/(C2*365),1)

Replacement year

Add the life to the install year for a target replacement date.

=YEAR(D2)+ROUND(B2/(C2*365),1)

Pitfalls & errors

One cycle is one up-and-down, not each direction. Counting each open and each close separately halves your life estimate incorrectly.

Cold garages, poor balance, and heavy insulated doors shorten real spring life. Treat the rating as an upper bound and inspect springs on high-use doors early.

Practice workbook

📊

Download the free Garage Door: Spring Life in Years practice workbook

Edit the yellow rating and cycles-per-day cells; the expected life recalculates.

Frequently asked questions

What counts as one cycle?

One full open followed by one close is a single cycle. Leaving in the morning and returning at night is two cycles, so a typical family easily reaches four to six a day.

Are 10,000-cycle springs the standard?

They are the common builder-grade rating. High-cycle springs at 15,000 or 20,000 cost a bit more up front but last much longer on a door that runs many times a day.

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Function references: ROUND