# Time Unit Converter - nanoseconds to hour, days in year, milliseconds in century, minutes in millenium...

Time Unit Converter allows to convert time intervals given in differnet units. You can fast and easy check how many seconds are in a year, how many seconds in a week, how many seconds in a day, how many weeks in a year, how many minutes/hours in a week/month, how many minutes are in a year etc. or even how many nanoseconds are in a day or year. Additionaly, we give you fast access to some typical and interesting values, for example you can see: how long does human pregnancy last (in a weeks, days), how long does light travel from sun to the earth, how long does astronomical year last.

Accuracy number of significant decimal digits
Nanosecond to Day
Nanosecond [ns] Microsecond [µs] Millisecond [ms] Second [s] Minute [min] Quadrans/Quarter (15 min) Hour [h] Day
More than Day
Week Month (30 days) Month (31 days) Year (365 days) Leap Year (366 days) Average Year (365.25636..) Century (100 years) Millenium
How long does it take for light to travel from Sun to the Earth
The Earth is 93 million miles (150 million kilometers) away from the Sun. It is average distance because Earth orbit is elliptical. The speed of light in a vacuum is 300,000 km/s so the light travel approximately about 8 minutes (more exactly: 499 seconds)
Iodine123 Half-Life
The half-life of a quantity whose value decreases with time is the interval required for the quantity to decay to half of its initial value. The half-Life of Iodine123 is about 13.1 hour.
How long does a human pregnancy last?
The duration of pregnancy in humans is about 40 weeks (280 days, equal to 9 calendar months) from the date of the last menstrual period.
How long is the Astronomical Year?
A sidereal year is the time taken by the Earth to orbit the Sun once with respect to the fixed stars. It equals 365.256363004 days (for the epoch J2000.0). That is 365 days 6 hours 9 minutes 9.76 seconds.
Carbon14 Half-Life
The half-life of a quantity whose value decreases with time is the interval required for the quantity to decay to half of its initial value The half-life of Carbon14 takes 5730 years.
The Age Of The Earth
Modern geologists and geophysicists consider the age of the Earth to be around 4.54 billion years (4.54 × 109 years ± 1%).
Popular Conversions (Click to convert)
Fundamental unit of time in the International System Of Units (SI) is second [s]
UnitIn Seconds
Less than a day
Nanosecond [ns]0.000000001
Microsecond [µs]0.000001
Millisecond [ms]0.001
Second [s]1
Minute [min]60