Set the timer to 173 minutes

How to use the online timer

Keeping track of a 173 minutes fasting or eating window is easier with a timer running than trying to remember what time you started. Set it the moment your window opens or closes, check back whenever you like without resetting anything, and let it count down in a browser tab you can leave open on your phone or computer. No app, no account, just the number you need.

Using it is as simple as it sounds: hit Start and the countdown takes over from there. Keep the browser tab open while it runs, since the timer only keeps counting while the page stays loaded, and pause or reset it any time if your plans change. When time's up, a sound plays to let you know, so you don't need to keep glancing at the screen.

Unlike a mechanical kitchen timer, this one doesn't need winding, batteries, or a spot on the bench where you'll remember to look at it. It sits in a browser tab, which means you can check it from your laptop, your phone, or any device with a browser without owning a gadget for it. Minimise the window and it keeps counting; just don't close the tab. Set a timer for 173 minutes, set the timer to 173 minutes, start a 173 minutes timer — it is the same countdown either way.