How to Wind an Automatic Watch (and How Often)

To wind an automatic watch that has stopped, unscrew the crown if needed, turn it clockwise 30 to 40 times to charge the mainspring, then set the time and put it on. From then on, the motion of your wrist keeps it wound, so you rarely need to hand-wind again unless it sits unworn for a day or two. You cannot overwind a modern automatic; the mainspring has a slipping clutch that prevents it.

Quick steps

1. If the crown screws down, unscrew it gently until it springs to the winding position.
2. With the crown in its normal, unpulled position, turn it clockwise (away from you) about 30 to 40 times.
3. Pull the crown out to set the time and date if needed.
4. Push the crown back in, and screw it down again if it is a screw-down type.
5. Wear it, or set it on a winder, to keep it running.

How an automatic winds itself

An automatic movement has a weighted rotor that pivots freely as your wrist moves. That rotor winds the mainspring, the coiled spring that stores the watch's energy. As long as you wear the watch through a normal active day, the rotor keeps the mainspring charged and the watch never stops. Hand-winding is only for waking a watch that has run down, or topping up one that has been sitting.

When you actually need to hand-wind

• It has stopped. A watch left off the wrist longer than its power reserve will halt. Wind it 30 to 40 turns to restart it cleanly rather than shaking it awake.
• You wear it lightly. A desk-bound day may not move the rotor enough to fully charge the spring. A few morning winds top it up.
• It comes off a winder or rotation. If you swap between several watches, the one you pick up may need a wind to get going.

Giving the mainspring a full manual charge in the morning also helps timekeeping. A fully wound spring delivers more even torque than one running near empty, so the watch holds a steadier rate. If yours is drifting, our guide on why an automatic loses or gains time covers the causes.

The technique, done right

• Take the watch off first. Winding on the wrist bends the crown stem at an angle and stresses it. Cradle the watch in your hand instead.
• Screw-down crown? Unscrew it anticlockwise until it pops free to the winding position before you wind. Do not force it.
• Wind smoothly, clockwise. Roll the crown forward, away from you, in steady half-turns between finger and thumb. Automatics wind in the forward direction; turning back does nothing on most and just adds wear.
• Stop at 30 to 40 turns. That is a full charge for most movements. On a fully wound automatic you may feel the crown go slightly springy as the clutch begins to slip, which is normal and harmless.
• Reseal. Push the crown back in, and screw it down fully if it is a screw-down type, so the water resistance is restored.

Why you cannot overwind it

This is the worry that stops people winding at all. On an automatic, the mainspring is not fixed at both ends. Its outer end connects to the barrel wall through a slipping clutch, a bridle that lets the spring slip once it reaches full charge. Keep turning and the spring simply slips rather than snapping. So you cannot overwind a healthy automatic by hand. Manual-wind watches are different, they can be wound tight and you stop when you feel firm resistance, but a self-winding movement protects itself.

Setting the time after winding

Once wound, pull the crown out to set the time. If the watch has a date, take care around the change-over window. Do not adjust the date between roughly 10pm and 2am, when the movement's date mechanism is engaged and can be damaged. Our guide to setting the date safely explains the danger zone in full.

If you rotate several watches

A watch winder keeps automatics you are not wearing charged and ready, turning them gently so the mainspring stays topped up and the oils do not settle. It is a convenience, not a necessity; hand-winding when you pick a watch up does the same job. For the wider care routine, see our automatic watch care guide. Automatic and mechanical pieces are in the automatic and mechanical collection and the shop.

Common questions

Can I overwind an automatic watch?

No. The mainspring connects through a slipping clutch that lets it slip at full charge, so a healthy automatic cannot be overwound by hand. Manual-wind watches are the ones you stop at firm resistance.

Which way do I turn the crown?

Clockwise, away from you, in the normal unpulled position. Turning it backwards does nothing useful on most automatics and only adds wear. About 30 to 40 forward turns gives a full charge.

Do I need to wind it every day?

No, if you wear it daily; wrist motion keeps it charged. Wind it only when it has stopped, when you wear it lightly, or first thing in the morning to steady its timekeeping.

Should I wind it on my wrist?

Better not to. Winding on the wrist angles the crown stem and stresses it. Take the watch off and cradle it in your hand so the crown turns straight.