Free tool

Will my watch still be running?

Pick your movement, or enter its power reserve, and when it was last full. We'll tell you whether it makes it to your deadline.

Movement Choose a movement… Power reserve (hours)

Last fully wound, or taken off Needs to be running at

For an automatic, use the time you took it off after a full day's wear. Worn only briefly, it may have less than its full reserve.

Stop checking. Get reminded.

Watch Winder does this for every watch you own, all the time, and nudges you a few hours before any of them stops.

FAQ

How long will my watch run?

For its power reserve, usually 38 to 80 hours from a full wind. Pick your movement above, or see every movement's reserve.

Will my watch still be running on Monday?

From 6pm on Friday to 8am on Monday is 62 hours. A fully wound watch with more reserve than that will still be running; enter your times above to check yours.

Why did my watch stop earlier than the calculator said?

An automatic worn only briefly may not have been fully wound, and an older watch due a service can run short of its published reserve. More on why automatics stop.