15 Minute Timer
Free 15 minute online countdown timer with alarm. Ideal for short workouts, cooking, study sessions, and timed tasks. Works offline, no install required.
Custom Duration
Fifteen minutes is the smallest unit of time that appears on most analog clocks, and it occupies a special place in human scheduling psychology — it's the minimum slot most calendars and meeting systems use. A quarter-hour is long enough to hold a meaningful conversation, complete a focused micro-project, or cook most simple meals, yet short enough that it doesn't feel like a significant commitment. In fitness, 15 minutes of zone-2 cardio (jogging, cycling, rowing at a conversational pace) is the minimum effective dose for cardiovascular adaptation according to many exercise physiologists. A 15-minute yoga flow covering sun salutations and a handful of standing poses constitutes a complete practice for busy days. In strength training, 15 minutes is the duration of most warm-up protocols for competitive lifters. In cooking, 15 minutes is the approximate total time for a well-executed weeknight stir-fry, the minimum simmer time for dried pasta sauce to develop flavor, and the rest time recommended for a sheet-pan roast after removing it from the oven. For studying, 15-minute active recall sessions — reading, then closing the material and writing down everything remembered — are supported by learning science as one of the most effective methods for long-term retention.
Related Timers
Free Online Countdown Timer
Zolkit's countdown timer works entirely in your browser — no install, no account, no ads interrupting your focus. Set any duration from seconds to hours using the input fields, or tap a preset pill (5m, 10m, 25m, 1hr) for the most common intervals. A three-tone alarm sounds when the countdown reaches zero. The tab title updates in real time so you can switch windows without losing track. Your last-used duration is saved locally so the timer is ready to go on your next visit.
Instant Start
Set your time and hit Start — the countdown begins immediately. No sign-up, no ads, no distractions.
16 Preset Durations
One-click presets from 30 seconds to 3 hours cover the most common timer needs: noodles, Pomodoro, workouts, and more.
Audible Alarm
A three-tone ascending chord plays when the timer ends. Mute toggle keeps your environment quiet when needed.
Fullscreen Mode
Expand to full screen for a visible countdown across the room. Ideal for classrooms, kitchens, and group workouts.
Works Offline
All logic runs in the browser. Once the page loads, no network connection is required.
Tab Title Countdown
The browser tab shows the remaining time so you never lose track when working in other windows.
How to Use the Timer
- 1
Enter hours, minutes, and seconds in the input fields — or tap a preset pill like '5m' or '25m' to load a common duration instantly.
- 2
Click 'Start' to begin the countdown. The progress ring shrinks from green to red as time elapses. Pause and Resume at any time.
- 3
When the timer reaches zero, a three-tone alarm sounds and the tab title shows '⏰ Time's Up!'. Click Reset to set a new countdown.
Frequently Asked Questions
Is 15 minutes of exercise enough to be beneficial?
Yes. Studies show that 15 minutes of moderate-intensity aerobic exercise per day is associated with significant reductions in cardiovascular risk. While more is generally better, 15 minutes is far better than nothing and is a sustainable habit for people with tight schedules.
What can I cook in 15 minutes?
In 15 minutes you can make a stir-fry, scrambled eggs, quesadillas, pasta with a simple sauce, a grain bowl from pre-cooked rice, or a quick sauté of vegetables. Having ingredients prepped in advance makes all the difference.
How should I use a 15-minute study timer?
Set the timer and read or review material with full focus for 15 minutes. When the alarm sounds, close the material and write down everything you remember before re-reading. This active retrieval technique significantly improves retention compared to passive re-reading.
How do I turn off the alarm quickly?
Click the Reset button or the mute button as soon as the alarm sounds. If you're using the timer repeatedly, Reset immediately prepares it for the next round without needing to re-enter the duration.