What Is a Quartz Movement?
How It Works, Accuracy and Battery Life

The Short Definition

A quartz movement is a battery-powered electronic mechanism that keeps time with a tiny quartz crystal. The battery sends current through the crystal, the crystal vibrates at a precise frequency, and a circuit counts those vibrations to drive the hands (or a digital display). The word "movement" is simply the watch industry's term for the engine inside the case, whether it is electronic or mechanical.

The alternative is a mechanical movement, which stores energy in a coiled spring and releases it through gears and a balance wheel. A mechanical movement wound by the motion of your wrist is called an automatic. Our movements explained article walks through all three types side by side.

How a Quartz Watch Keeps Time

Quartz is piezoelectric: apply a voltage to it and it flexes; flex it and it produces a voltage. Cut into a tiny tuning-fork shape and placed in a circuit, a quartz crystal oscillates at a very stable frequency — in almost all watches 32,768 times per second. The circuit divides that frequency down to exactly one pulse per second, and that pulse drives a small stepping motor that advances the seconds hand by one step.

That is why a quartz seconds hand ticks once per second while an automatic's hand appears to sweep: the automatic's balance wheel is beating six or eight times per second and the hand moves with every beat. The tick is not a sign of lower quality; it is simply the one-second pulse made visible.

1. Battery supplies power — usually a silver-oxide button cell.
2. Quartz crystal oscillates at 32,768 Hz.
3. Integrated circuit divides the oscillation down to one pulse per second.
4. Stepping motor turns that pulse into a one-step rotation.
5. Gear train carries the rotation to the seconds, minute and hour hands.

How Accurate Is a Quartz Movement?

Far more accurate than any ordinary mechanical watch. A standard quartz caliber is typically specified at around ±15 seconds per month, and many run better than that in practice. For comparison, entry-level automatic calibers are specified in the region of -20/+40 seconds per day, and even chronometer-certified mechanical watches are allowed -4/+6 seconds per day. High-accuracy quartz movements — thermocompensated calibers from makers such as Citizen, Seiko (Grand Seiko) and Longines — narrow that to a few seconds per year.

Quartz accuracy drifts slightly with temperature, which is why a watch worn daily (held near body temperature) usually performs better than one left in a drawer. If you want to know what "normal" looks like for a mechanical watch instead, see how accurate an automatic watch should be.

Battery Life and the End-of-Life Signal

A plain analog quartz watch typically runs two to five years on one cell. Chronograph functions, alarms and backlights drain it faster; solar-charged quartz watches (Citizen Eco-Drive, Seiko Solar, Casio Tough Solar) recharge from light and can go a decade or more without a cell change.

Many quartz movements include an end-of-life indicator: when the battery is nearly flat, the seconds hand starts jumping in two- or four-second steps while still keeping correct time. That is the cue to have the battery replaced. Have it done by a watchmaker or jeweler rather than at home if the watch has any water-resistance rating — the caseback gasket needs to be re-seated correctly, and a dead battery left in the watch for months can leak and corrode the circuit.

Quartz vs Automatic — The Honest Comparison

The practical summary: a quartz watch is the better instrument, an automatic is the better object. If you simply need the correct time with zero effort, buy quartz. If you want a watch to own for decades, take an interest in and eventually pass on, you are looking for an automatic — our automatic watch section explains how to choose one, and automatic vs quartz weighs the decision for a first serious watch.

Variations You Will See on Listings

• Analog quartz: hands driven by a stepping motor — the common case.
• Digital quartz: the same oscillator driving an LCD display (most Casio watches).
• Ana-digi: both hands and a digital display in one watch.
• Quartz chronograph: adds stopwatch sub-dials; the pushers control the stopwatch electronically.
• Solar quartz: a photovoltaic cell under the dial charges a rechargeable cell; no battery changes.
• Kinetic / autoquartz: a rotor like an automatic's generates electricity for a quartz movement — a hybrid approach Seiko has used for decades.
• High-accuracy quartz (HAQ): thermocompensated calibers specified at ±5 to ±10 seconds per year.
• Swiss quartz / Japanese quartz: the country of origin of the caliber, not a grade of accuracy.

Should a Watch Collector Own a Quartz Watch?

Most do, whether they admit it or not. A quartz watch is the one you grab when you have not worn anything for a week and do not want to set the time, the one you take travelling where a knock will not matter, and the one you wear to the beach. The mechanical watches in your collection are for everything else. If you are building a small first collection, our guide to building a first watch collection suggests where each type fits.