Fasting Timer Online Free
This fasting timer tracks how long you've gone without eating — set a goal in hours, tap Start Fasting, and watch a progress ring fill in real time. There is no app to install and no account: your start time is saved right on this device, so closing the tab or letting your phone sleep never resets the count.
How This Fasting Timer Works
Set a goal in hours (16 by default) and tap Start Fasting. The timer records that exact moment and immediately starts counting up in hours, minutes, and seconds. Because it stores the start time itself rather than just a running count in memory, the elapsed time stays accurate even if you close the tab, lock your phone, or come back a day later — it recalculates from the saved starting point every time the page loads. When you're ready to eat again, tap End Fast to see your final duration.
Choosing a Fasting Window — 16:8, 18:6, OMAD, and Custom Goals
The goal field accepts any whole number of hours from 1 to 72, so it can track whichever intermittent fasting pattern you follow:
- 16:8 — a 16-hour fast and an 8-hour eating window, the most common pattern. Set the goal to 16.
- 18:6 — an 18-hour fast and a 6-hour eating window. Set the goal to 18.
- OMAD (One Meal A Day) — roughly a 23-hour fast with a single 1-hour eating window. Set the goal to 23.
- Any custom window — anything from a short 12-hour fast to an extended 72-hour one.
The goal only shapes the progress ring — the elapsed-time count itself never stops or caps, so running past your goal is tracked exactly the same way as reaching it.
Reading the Progress Ring and Elapsed Time
While a fast is active, the big number in the center is your elapsed time in hours, minutes, and seconds, and the ring around it fills clockwise as you approach your goal. Once elapsed time reaches the goal, the ring closes completely and the label beneath the clock switches from a countdown-style "of {goal}h goal" to Goal reached — the timer keeps running past that point for as long as your fast continues.
Forgot to Start? Backdating Your Fast
If you open this page sometime after your last meal instead of right away, tap Edit Start Time on the setup screen before starting. A date-and-time field appears where you can enter the actual moment you stopped eating (it can't be set to a future time), and the timer will begin counting from that real starting point rather than from now — so a late start doesn't throw off your total.
What Happens When You Reach Your Goal
Nothing forces you to stop — the timer has no alarm and doesn't end your fast automatically. Reaching your goal simply fills the progress ring and switches the label to Goal reached; the elapsed clock keeps counting for as long as you keep the fast going. When you do eat again, tap End Fast to lock in the final duration on a summary screen, then Start a New Fast whenever you're ready to begin the next one.
Frequently Asked Questions
How long have I been fasting?
Tap Start Fasting and the timer records the exact moment you began, then counts up in hours, minutes, and seconds for as long as the fast continues. Because it stores that start time on your device rather than in memory, closing the tab, restarting your phone, or letting the screen sleep never resets or loses the count — reopening the page shows exactly how long you've been fasting.
When should I start my fasting timer?
Start it the moment you finish eating — that's the beginning of your fasting window. If you forget and open the timer later, you don't have to lose accuracy: tap Edit Start Time on the setup screen and enter the actual time your last meal ended, and the timer will count from that real starting point instead of from now.
What is the 16:8 fasting schedule?
16:8 means a 16-hour fasting window followed by an 8-hour eating window each day — the most common intermittent fasting pattern. To track it here, set the goal to 16 hours; the progress ring fills as you approach that mark, and the timer keeps counting even past it if your fast runs longer.
What is 18:6 intermittent fasting?
18:6 is a longer variant of the same idea — an 18-hour fasting window and a 6-hour eating window. Set the goal to 18 hours to track it; everything else about the timer works the same as any other goal length from 1 to 72 hours.
How many hours is OMAD (one meal a day)?
OMAD (One Meal A Day) typically means roughly a 23-hour fast with a single 1-hour eating window. Set the goal to 23 hours to track an OMAD-style window with this timer.
Is 18 hours of fasting enough?
This timer tracks any window you set, from 1 to 72 hours, including 18-hour fasts — it doesn't judge or recommend a length, it just measures the one you choose. What counts as "enough" depends on your own goals and health, so check with a doctor before starting a new fasting routine.
