45:00
45 minutes
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Space Start / Pause · R Reset
| Start time | +45 min | −45 min |
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45 minutes is the standard university lecture period, the traditional gym session length, and three-quarters of an hour — making time calculations easy.
A full roast chicken at 200°C, slow-braised beef short ribs, baked mac and cheese, or a soufflé.
45-minute swim training sessions are standard for competitive swimmers building aerobic base.
Two full Pomodoro blocks with a 5-minute break between them — enough for deep reading or problem sets.
Many university lecture periods are 45 minutes rather than the traditional 50 or 60, reflecting research that active attention declines sharply after 45 minutes without a break.
Start your 45 minutes countdown in one click — no setup, no ads, no account needed.
The timer loads pre-set to 45:00. No configuration required.
Click Start or press Space. The ring begins counting down immediately.
Press Space to pause and resume. Press R to reset to 45:00.
Three clear beeps play when the countdown ends. The ring turns green.
Common questions about 45-minute intervals, time calculations, and this timer.
Add 45 to your current minute. If the total exceeds 59, subtract 60 and add 1 to the hour. Example: 2:20 PM + 45 = 3:05 PM; 3:30 PM + 45 = 4:15 PM.
45 minutes equals exactly 2,700 seconds, or three-quarters of an hour.
45 minutes of moderate exercise 5 days a week exceeds the WHO minimum recommendations and is associated with significant reductions in all-cause mortality, cardiovascular disease, and type 2 diabetes risk.
45 minutes is three-quarters (3/4) of an hour, or 0.75 hours. It is also equal to 2,700 seconds.
At an average recreational pace of 6 min/km you cover 7.5 km. At a competitive 4 min/km pace you cover 11.25 km. Most half-marathon training plans use 45-minute runs as a core mid-week session.
Type 'set timer for 45 minutes' in Google Search — a timer widget appears instantly. Or say 'Hey Google, set a 45-minute timer' to any Google Assistant device.
Most fitness professionals recommend 45–60 minutes as the optimal total session length including warm-up and cool-down. Sessions longer than 90 minutes elevate cortisol and risk overtraining without proportional benefit for most non-athletes.