Instant · Precise · Universal
28 units available
6 categories total
To convert seconds to minutes: divide by 60. To convert to hours: divide by 3,600. To milliseconds: multiply by 1,000.
1 s = 1,000 ms = 10⁶ µs = 10⁹ ns. There are 60 seconds in a minute and 86,400 in a day.
For example, 1 Second (s) = 100000000 Shake (shake).
| Second (s) | Shake (shake) |
|---|---|
| 0.1 | 10000000 |
| 0.5 | 50000000 |
| 1 | 100000000 |
| 2 | 200000000 |
| 5 | 500000000 |
| 10 | 1000000000 |
| 25 | 2500000000 |
| 50 | 5000000000 |
| 100 | 10000000000 |
| 500 | 50000000000 |
| 1000 | 100000000000 |
The second is the SI base unit of time, defined by the fixed value of the cesium-133 hyperfine transition frequency: exactly 9,192,631,770 cycles.
1 s = 1,000 ms = 10⁶ µs = 10⁹ ns. There are 60 seconds in a minute and 86,400 in a day.
To convert seconds to minutes: divide by 60. To convert to hours: divide by 3,600. To milliseconds: multiply by 1,000.
All timekeeping — clocks, timers, stopwatches, cooking, traffic lights, music tempo (BPM), and heartbeat monitoring.
Cesium atomic clocks are accurate to about 1 second in 300 million years. The 2019 SI redefinition preserved the second's cesium-based definition.
Using 'sec' instead of 's' in scientific writing. Also, assuming all seconds are exactly equal — leap seconds exist to correct for Earth's slowing rotation.
A heartbeat lasts about 0.8 seconds. Counting 'one Mississippi' is a classic way to estimate one second.
A shake is an informal unit of time equal to 10 nanoseconds (10⁻⁸ seconds), used in nuclear physics.
1 shake = 10 ns = 10⁻⁸ s = 10,000 ps. A nuclear fission event takes about 1 shake.
To convert shakes to seconds: multiply by 10⁻⁸. To nanoseconds: multiply by 10.
Timing nuclear chain reactions, modeling neutron transport in reactors, and nuclear weapon physics calculations.
In a nuclear explosion, the chain reaction is complete in about 50–60 shakes (500–600 ns). The name reflects the era's dark humor.
Not recognizing 'shake' as a real unit. It's informal but precisely defined and still used in nuclear engineering.
A 'shake' = 10 nanoseconds. It was invented at Los Alamos to make nuclear timing calculations easier — humor in extreme circumstances.



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