Millisecond
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Millisecond

A millisecond (from milli- and second; symbol: ms) is a thousandth (0.001 or 10-3 or 1/1000) of a second.[1][2]

A unit of 10 milliseconds may be called a centisecond, and one of 100 milliseconds a decisecond, but these names are rarely used.[3]

Horizontal logarithmic scale marked with units of time

To help compare orders of magnitude of different times, this page lists times between 10−3 seconds and 100 seconds (1 millisecond and one second). See also times of other orders of magnitude.

## Examples

• 1 millisecond (1 ms) - cycle time for frequencykHz; duration of light for typical photo flash strobe; time taken for sound wave to travel ca. 34 cm; repetition interval of GPS C/A PN code
• 1.000692286 milliseconds - time taken for light to travel 300 km in a vacuum
• 2 milliseconds to 5 milliseconds - typical response time in LCD computer monitors, especially high-end displays
• 2.27 milliseconds - cycle time for A440 (pitch standard), the most commonly used pitch for tuning musical instruments
• 3 milliseconds - a housefly's wing flap
• 3.3 milliseconds - normal delay time between initiation and detonation of a C4 explosive charge
• 4 milliseconds - typical average seek time for a 10,000 rpm hard disk
• 5 milliseconds - a honey bee's wing flap
• 5 milliseconds to 80 milliseconds - a hummingbird's wing flap
• 8 milliseconds - 1/125 of a second, a standard camera shutter speed (125); fastest shifting time of a car's mechanical transmission
• 10 milliseconds (10 ms) - a jiffy, cycle time for frequency 100 Hz
• 10.378 milliseconds - rotation period of pulsar B1639+36A
• 15.625 milliseconds - a two hundred fifty-sixth note at 60 BPM
• 16.67 milliseconds (1/60 second) - a third, cycle time for American 60 Hz AC electricity (mains grid)
• 16.68 milliseconds (1/59.94 second) - the amount of time one field lasts in 29.97 fps interlaced video (commonly erroneously referred to as 30 fps)
• 20 milliseconds - cycle time for European 50 Hz AC electricity
• 31.25 milliseconds - a hundred twenty-eighth note at 60 BPM
• 33.367 milliseconds - the amount of time one frame lasts in 29.97 fps video (most common for NTSC-legacy formats)
• 41.667 milliseconds - the amount of time one frame lasts in 24 fps video (most common cinematic frame rate)
• 41.708 milliseconds - the amount of time one frame lasts in 23.976 fps video (cinematic frame rate for NTSC-legacy formats)
• 50 milliseconds - the time interval between gear changes on a Lamborghini Aventador
• 50 milliseconds - cycle time for the lowest audible tone, 20 Hz
• 60 milliseconds - cycle time for European 16.7 Hz AC electrified railroad power grid
• 60 milliseconds - the time interval between gear changes on a Ferrari 458 Spider
• 62.5 milliseconds - a sixty-fourth note at 60 BPM
• 5 to 80 milliseconds - typical latency for a broadband internet connection (important for playing online games)
• 100 milliseconds - the time interval between gear changes on a Ferrari FXX
• 125 milliseconds - a thirty-second note at 60 BPM
• 134 milliseconds - time taken by light to travel around the Earth's equator
• 150 milliseconds - recommended maximum time delay for telephone service
• 185 milliseconds - the duration of a full rotation of the main rotor on Bell 205, 212 and 412 helicopters (normal rotor speed is 324 RPM)
• 200 milliseconds - the time it takes the human brain to recognize emotion in facial expressions
• 250 milliseconds - a sixteenth note at 60 BPM
• 300 to 400 milliseconds - the time for the human eye to blink
• 400 milliseconds - time in which the fastest baseball pitches reach the strike zone
• 430 to 500 milliseconds - common modern dance music tempos (120-140 BPM)
• 495 milliseconds - an approximate average of the round trip time for communications via geosynchronous satellites
• 500 milliseconds - an eighth note at 60 BPM
• 770 milliseconds - revolution period of a 78 rpm record
• 860 milliseconds - average human resting heart cycle time
• 1000 milliseconds - one second; the period of a 1 Hz oscillator
• 86,400,000 (24 × 60 × 60 × 1000) milliseconds - one day
• 604,800,000 (24 × 60 × 60 × 1000 × 7) milliseconds - one week
• 31,556,908,800 (86,400,000 × 365.242) milliseconds - one year

## References

1. ^ "Units: M". How Many? A Dictionary of Units of Measurement.
2. ^ New Oxford Dictionary
3. ^ Google nGrams shows them as << 0.5% of "millisecond" nGrams comparison of word frequency of centisecond and decisecond vs. millisecond

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