Quartz watches keep time using a sliver of quartz crystal that vibrates at a precise frequency when electricity passes through it — the piezoelectric effect. It is a brilliant, elegant technology that made accurate timekeeping available to everyone. Around nine out of ten watches sold worldwide are quartz.
How quartz keeps time
- A battery sends current to an integrated circuit.
- The circuit drives a tiny tuning-fork-shaped quartz crystal, which vibrates at 32,768 Hz (215 times per second).
- The circuit counts vibrations and divides them down to one pulse per second.
- Each pulse drives a stepping motor that moves the gear train and hands one step — the characteristic "tick".
Because the crystal vibrates so fast and so consistently, the result is typically accurate to about ±15 seconds per month — around 20 to 50 times more accurate than a typical mechanical watch.
Types of quartz movement
| Type | Accuracy | Examples |
|---|---|---|
| Standard analogue quartz | ±10–20 s/month | Most fashion and entry watches |
| Digital (LCD) quartz | ±15–30 s/month | Casio F-91W, G-Shock |
| High-performance (262 kHz) | ±10 s/year (manufacturer claim) | Bulova Precisionist and Lunar Pilot |
| Thermocompensated HAQ | ±5–20 s/year | Grand Seiko 9F, Citizen Caliber 0100 (±1 s/year) |
| Solar quartz | As standard | Citizen Eco-Drive, Seiko Solar |
| Radio-controlled | Synced daily to atomic time | Casio Wave Ceptor, Citizen Atomic |
| Mecaquartz | As standard | Quartz chronographs with mechanical-feel pushers |
Temperature is quartz's enemy: the crystal's frequency changes slightly with heat and cold. Thermocompensated movements measure temperature and correct for it, which is how HAQ watches achieve seconds-per-year accuracy.
Battery life and changes
Most analogue quartz watches run 2–5 years on a silver-oxide cell; some slim dress watches less, some digital watches up to 10. Many quartz watches warn you of a low battery with an end-of-life indicator — the seconds hand starts jumping in 2- or 4-second steps.
An exhausted battery can leak and corrode the movement. If a quartz watch stops, replace the battery promptly or remove it. More in battery replacement and water resistance.
Why quartz deserves respect
Quartz is sometimes dismissed by enthusiasts, but consider:
- Grand Seiko assembles its 9F quartz movements by hand and adjusts crystals after ageing them for months.
- Quartz allows extremely thin, light and shock-resistant designs.
- It is the natural choice for the digital, military and professional tool watches that must never stop.
- For a watch you'll only wear occasionally, it's simply more practical.
Who should buy quartz?
Anyone who wants precision without maintenance, owns several watches, needs a dependable tool, or is shopping on a budget. Compare it fully with mechanical in mechanical vs quartz.
FAQ
How long does a quartz watch last?
With battery changes and occasional gasket replacement, a good quartz watch can run for decades. The circuit may eventually fail, but in quality watches it is usually replaceable.
Why does my quartz watch's second hand jump every few seconds?
That's the end-of-life indicator. The battery is nearly flat — replace it soon to avoid the watch stopping or the battery leaking.
