## Unit Converter

## Convert 349 Hours to Nanoseconds

To calculate 349 Hours to the corresponding value in Nanoseconds, multiply the quantity in Hours by 3600000000000 (conversion factor). In this case we should multiply 349 Hours by 3600000000000 to get the equivalent result in Nanoseconds:

349 Hours x 3600000000000 = 1.2564E+15 Nanoseconds

**349 Hours is equivalent to 1.2564E+15 Nanoseconds.**

## How to convert from Hours to Nanoseconds

The conversion factor from Hours to Nanoseconds is 3600000000000. To find out how many Hours in Nanoseconds, multiply by the conversion factor or use the Time converter above. Three hundred forty-nine Hours is equivalent to one quadrillion two hundred fifty-six trillion Nanoseconds.

## Definition of Hour

An hour (symbol: h; also abbreviated hr.) is a unit of time conventionally reckoned as 1⁄24 of a day and scientifically reckoned as 3,599–3,601 seconds, depending on conditions. The seasonal, temporal, or unequal hour was established in the ancient Near East as 1⁄12 of the night or daytime. Such hours varied by season, latitude, and weather. It was subsequently divided into 60 minutes, each of 60 seconds. Its East Asian equivalent was the shi, which was 1⁄12 of the apparent solar day; a similar system was eventually developed in Europe which measured its equal or equinoctial hour as 1⁄24 of such days measured from noon to noon. The minor variations of this unit were eventually smoothed by making it 1⁄24 of the mean solar day, based on the measure of the sun's transit along the celestial equator rather than along the ecliptic. This was finally abandoned due to the minor slowing caused by the Earth's tidal deceleration by the Moon. In the modern metric system, hours are an accepted unit of time equal to 3,600 seconds but an hour of Coordinated Universal Time (UTC) may incorporate a positive or negative leap second, making it last 3,599 or 3,601 seconds, in order to keep it within 0.9 seconds of universal time, which is based on measurements of the mean solar day at 0° longitude.

## Definition of Nanosecond

A nanosecond (symbol: ns) is an SI unit of time equal to one billionth of a second (10−9 or 1/1,000,000,000 s). One nanosecond is to one second as one second is to 31.71 years. The word nanosecond is formed by the prefix nano and the unit second. A nanosecond is equal to 1000 picoseconds or 1⁄1000 microsecond. Because the next SI unit is 1000 times larger, times of 10−8 and 10−7 seconds are typically expressed as tens or hundreds of nanoseconds. Times of this magnitude are commonly encountered in telecommunications, pulsed lasers and some areas of electronics.

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