Online Timer Suite
9 ToolsPrecision online countdown timers with audio alerts, presets from 1 to 60 minutes, and fullscreen display.
⚡Available Online Timer Tools
Instant start • Free • Zero drift1 Minute Timer
Quick 60-second countdown timer with audible bell alert. Perfect for quick classroom quizzes, 1-minute meditation, kitchen boiling, and rapid brainstorms.
5 Minute Timer
Reliable 5-minute countdown clock. Widely used for short study breaks, 5-minute standup meetings, tea brewing, presentations, and rapid workouts.
10 Minute Timer
Standard 10-minute countdown with clear digital numerals and audio alert. Excellent for timed tests, writing sprints, group exercises, and yoga.
15 Minute Timer
Quarter-hour countdown timer. Great for coffee breaks, Agile daily standups, 15-minute power cleans, and high-focus work intervals.
20 Minute Timer
20-minute countdown timer with pleasant ending chime. Recommended for power naps, eye-rest intervals, cardio sessions, and reading time.
25 Minute Timer
Classic 25-minute single-interval timer based on the Pomodoro Technique. Boost your productivity with high-intensity 25-minute focus blocks.
30 Minute Timer
Full half-hour countdown timer with audio chime and fullscreen support. Great for 30-minute lectures, fitness workouts, and baking.
45 Minute Timer
45-minute countdown clock tailored for standard school periods, exam drills, and high-engagement work sessions.
60 Minute Timer
Complete 1-hour countdown timer with audio alert. Ideal for 60-minute exams, webinar presentations, full-hour study blocks, and roasting recipes.
About the Online Timer Suite
The Calendar-EDU Online Timer collection provides high-precision digital timekeeping instruments accessible directly in your web browser. Designed for educational classrooms, university study spaces, fitness centers, offices, and home daily routines, each tool operates entirely client-side with crystal-clear Web Audio alarms and zero latency.
By calculating real-time clock timestamps rather than relying on browser event loop ticks, our timers never lag when working in background tabs.
Optimized for smartphones, tablets, laptops, and classroom smartboards. Supports keyboard shortcuts and single-tap fullscreen mode.