How an automatic watch works
An automatic watch is a mechanical watch that draws its energy from a mainspring. A semicircular rotor swings with every movement of your wrist and winds this spring automatically, hence the name. The stored energy is translated via a gear train and the escapement into regular impulses that drive the hands.
If you wear the watch every day, it runs practically without interruption. If you take it off, it keeps working for as long as its power reserve lasts. Typical values are between 38 and 80 hours; modern movements such as the Powermatic 80 in the Tissot PRX Powermatic 80 manage a whole weekend without movement.
The appeal of an automatic lies less in precision than in the mechanism itself. Hundreds of tiny parts work together without any electronics, often visible through a glass case back. A well-maintained automatic watch can last for decades and is often passed down.
How a quartz watch works
A quartz watch draws its energy from a battery. A tiny quartz crystal is made to oscillate electrically, exactly 32,768 times per second. The electronics divide this extremely stable frequency down and use it to generate the one-second pulse that a small motor passes on to the hands.
The result is an accuracy that no mechanical movement can match: a deviation of a few seconds per month is standard, while common automatic movements vary by 10 to 30 seconds per day. Add the low maintenance, because apart from a battery change every two to five years, a quartz watch needs hardly any attention.
Quartz also has the price advantage on its side. Reliable models such as the Casio F-91W cost less than a restaurant meal, and even well-made quartz watches with sapphire crystal such as the Tissot PRX 40 Quarz stay well below comparable automatic models.
Automatic vs. quartz compared directly
The table below sets the most important criteria side by side. It shows that in the automatic vs. quartz contest there is no overall winner, just two concepts with clear profiles. What matters is which characteristics really count in your everyday life.
| Criterion | Automatic | Quartz |
|---|---|---|
| Accuracy | approx. 10 to 30 sec/day, chronometer better | a few sec/month |
| Energy source | Motion, mainspring | Battery or solar cell |
| Maintenance | Service every 5 to 10 years | Battery change every 2 to 5 years |
| Run time when not worn | 38 to 80 hrs power reserve | runs for years |
| Entry price for solid quality | from approx. €150 | from approx. €25 |
| Case height | usually taller | often slimmer |
| Character | Mechanics, tradition, quality feel | Precision, carefree use |
Hand-wound and solar: the two special cases
Hand-wound: mechanics in their original form
Before the automatic, hand winding was the standard: you wind the spring yourself every day via the crown. Many enthusiasts value exactly this ritual, and hand-wound movements are often slimmer than automatic calibres with a rotor. Modern examples are the Hamilton Khaki Field Mechanical with 80 hours of power reserve or the Nomos Tangente 35 from Glashütte.
In practice, hand winding means a little more discipline, because without daily winding the watch stops. If you like the ritual, you experience it not as a chore but as a brief moment of calm. For everyone else, the automatic is the more convenient form of mechanics.
Solar: quartz without battery changes
Solar watches are quartz watches that convert light into energy via a cell in the dial and store it in a rechargeable cell. A fully charged store bridges many months of darkness, depending on the model. Citizen calls its technology Eco-Drive; the Citizen Promaster Diver BN0150 shows how robust and suited to everyday use the concept is.
For frequent wearers who simply never want to think about energy, solar is the most carefree solution there is. The extra cost compared with an ordinary quartz watch is manageable, and the technology spares the environment regular disposable batteries.
Who an automatic is right for
An automatic suits you if mechanics fascinate you and you see a watch as more than a timekeeping device. The smoothly gliding seconds hand, the weight of a movement on the wrist and the thought that no battery is involved are, for many, the real appeal. Value retention also counts in its favour: well-maintained mechanical watches from well-known brands last for decades.
Expect some maintenance effort in return. A service every 5 to 10 years is part of it, as is tolerance for small rate deviations. Good entry points into mechanics are the Seiko 5 Sports SRPD55 or the Orient Bambino, both well under a guide price of 400 euros.
Who quartz is the better choice for
Quartz suits you if the watch mainly needs to work: accurate, uncomplicated and without rituals. Anyone who wears the watch only occasionally benefits especially, because a quartz watch shows the right time even after weeks in a drawer. The same applies to shock-intensive use, where delicate mechanics have no place; a G-Shock DW-5600E shrugs off what would put an automatic movement at risk.
Price-conscious beginners are also better off with quartz at first. For under 100 euros you get reliable everyday watches, whereas solid mechanics only start at around 150 to 200 euros. You will find an overview of affordable models in the guide to the best watches under 200 euros.
Common mistakes when deciding
- Looking only at accuracy: Anyone who judges an automatic purely by seconds per day misses the point. You buy mechanics for their character, not despite the deviation.
- Forgetting the follow-up costs: An inexpensive automatic watch can incur service costs over the years that exceed the purchase price. Factor that in honestly.
- Dismissing quartz as cheap across the board: There are well-made quartz watches with sapphire crystal and a branded movement that surpass many automatic models in finish and everyday suitability.
- Ignoring the power reserve: If you rotate between several watches, you will appreciate 70 or 80 hours of power reserve instead of the classic 38 to 42 hours.
If you are unsure, it helps to look at how you have worn watches over the last few months. Wearing the same watch every day points to an automatic; rarer changes and long breaks point to quartz or solar. The Watch Finder treats the drive as a criterion of its own and suggests suitable models.
Conclusion: the right choice in the automatic vs. quartz contest
Automatic vs. quartz is not a question of better or worse but of priorities. An automatic rewards you with mechanics, tradition and longevity, but demands care and tolerance for imprecision. Quartz delivers maximum accuracy at a small price and asks almost nothing of you, though it stays more emotionally sober.
Many watch lovers end up with both, by the way: a mechanical watch for deliberate moments, a quartz or solar watch for robust everyday use. The best way to compare your favourites is directly in the Watch Comparison, where you see drive, power reserve and guide price side by side at a glance.
Suitable accessories: Whether your automatic should run on a winder between wearing days is answered honestly and without sales pressure by our accessories sister site: Does my watch need a watch winder?