30 Minute Timer

Half an hour is the default length of many calendar slots, a typical lunch walk and a very common workout session. This timer counts 30:00 down from the moment the page opens.

The alarm repeats at zero until you stop it, so you can put the device down and be fully absorbed in what you are doing.

How to use this tool

1. Open the page; the half hour starts at once.
2. Press Pause or Space for interruptions and press it again to continue.
3. Press Restart (R) for another 30 minutes.
4. When it rings, press Stop or any key, or add a minute at a time with +1 minute.

Exercise

Public health guidance for adults is built around a weekly total: the US Centers for Disease Control and Prevention recommends at least 150 minutes of moderate-intensity activity per week. Thirty minutes on five days adds up to exactly that, which is why this length is so popular for walks, rides and gym sessions.

Meetings and appointments

Many calendar tools default to a 30-minute event. Put the page on a shared screen, state the goal at the start and let the alarm mark the end. If the topic is not finished, schedule a follow-up instead of letting the meeting drift.

Cooking and baking

Roasted vegetables, a tray of cookies, rice resting off the heat or a quick sauce reduction often take about this long. Always check the recipe and your oven, because times vary with temperature and quantity.

Deep work

A half hour is long enough for a substantial chunk of writing or coding and short enough that you can protect it from interruptions. Silence notifications, state the one outcome you want, and use the beep as the end of the session.