Start a fasting timer and track how many hours and minutes you've been fasting. Stop anytime to see your total fasting duration.
Track your intermittent fasting sessions with a simple start/stop timer. Click start to begin tracking your fast — the timer stores your start time in your browser and shows elapsed hours and minutes in real-time. When you're ready to eat, click stop to see a summary of your total fasting duration. All data stays on your device.
Click Start Fast to begin tracking your fasting session. The timer will show how many hours and minutes you've been fasting. When you're ready to eat, click End Fast to see a summary of your total fasting duration. Your start time is saved in your browser so you can close the page and come back.
That sounds basic, but it solves a real habit problem. People often remember roughly when they stopped eating, then gradually turn “roughly” into a false sense of precision. A fasting timer is valuable because it replaces memory with an exact elapsed duration.
This tool is best for simple self-tracking when you want to know where the current fast stands right now.
If you are following a repeated pattern like 12, 14, or 16 hours, the timer makes the window visible instead of approximate.
A timer is useful when the goal is not only to fast, but to know whether you actually hit the intended duration.
Some people do not want a full nutrition app when the only question is the elapsed time.
Its value is precision without overhead. You start the session, let it run, and return to a live answer rather than an estimate from memory.
That makes it especially helpful for repeated habits, where small differences in start and end times accumulate into a less reliable picture than people think.
If the timer begins well after the last meaningful intake, the precision is false from the start.
A timer is only honest if the stop point reflects what actually happened.
Elapsed hours may be the metric you want here, but they do not automatically say anything about whether the approach is suitable, healthy, or effective for a specific person.
A 16-hour fast either happened or it did not. The timer removes the ambiguity.
If you are testing several fasting lengths, a consistent timing method makes the comparison cleaner.
For many users, the timer is enough because they are not trying to log food, macros, or biomarkers in the same place.
This tool measures fasting duration. It does not recommend a fasting protocol, give medical advice, or assess calories, hydration, medication timing, or health outcomes. It is a timer, not a clinical or nutrition system.
Habit tools often earn their value by making one narrow thing visible and exact. For intermittent fasting, elapsed time is often that thing. A simple timer helps because it makes the habit measurable without adding unnecessary system overhead.
Yes. Your start time is saved in your browser's local storage, so you can close the page and come back later — the timer will continue from where you left off.
Common intermittent fasting schedules include 16:8 (16 hours fasting, 8 hours eating window), 18:6, or 20:4. Consult a healthcare professional for advice suitable for you.
No. All data is stored locally in your browser. Nothing is sent to any server.
This tool runs entirely in your browser. Nothing you type or paste is sent to any server — all processing happens locally on your device.