Time Converter

1 attosecond × 1.00000000000000000000e-18 → 1.00000000000000000000e-18 s
1.00000000000000000000e-18 s ÷ 1.00000000000000000000e-15 → 0.001 femtosecond

Details About Time Units

Time is a fundamental physical quantity used to measure duration, sequence, and the time difference between events. Time units range from seconds to centuries and years, used in science, engineering, and daily use.

• s, ms, μs, ns – SI and subsecond units employed in physics, computer science, and precise engineering.
• min, h, d, wk – Usual time units for everyday use and timetabling.
• mo, yr, decade, century – Units concerning calendars, typically averaged for calculation.
• sidereal and synodic units – Utilized in astronomy and space sciences.
• exotic units – Like shake (used in nuclear physics), or multi-year cycles such as septennial or quindecennial.

Time Units: Brief Overview

Time is a fundamental dimension used to organize daily life, history, and scientific procedures. Here is a brief overview of commonly used time units that can be used in daily as well as professional life.

• Nanosecond (ns): One billionth of a second (10⁻⁹). Used in computers and electronics.
• Microsecond (μs): One millionth of a second (10⁻⁶). Used in audio processing and microcontroller programming.
• Millisecond (ms): One thousandth of a second (10⁻³). Employed in software quickness and sports timing.

Standard Units of Time

• Second (s): The SI unit of time. Defined by the transition frequency of the cesium atom.
• Minute (min): 60 seconds. Employed everywhere in time measurement.
• Hour (h): 60 minutes or 3,600 seconds.
• Day (d): A solar day, 24 hours long.
• Week (wk): A duration of time equal to 7 days. Standard in most calendars today.
• Fortnight: A 14-day interval. Used informally in British English.

Monthly and Yearly Units

• Month (avg, 30.44 d): Average length of a calendar month in the Gregorian calendar.
• Month (synodic): Period between two full moons (~29.53 days), used in lunar calendars.
• Year (avg, 365.25 d): Gregorian calendar year, including leap years.
• Year (Julian): Fixed at 365.25 days; used in the Julian calendar.
• Year (leap): 366-day year, every 4 years to synchronize the calendar.
• Year (tropical): About 365.2422 days, aligning with Earth's seasons.
• Year (sidereal): The duration for Earth to complete an orbit about the Sun relative to distant stars (~365.256 days).

Long Time Units

• Decade: A period of 10 years.
• Century: An interval of 100 years.
• Millennium: An interval of 1,000 years.

Sidereal Time (Astronomical Use)

• Day (sidereal): Very slightly shorter than a solar day (~23h 56m), relative to Earth's rotation towards stars.
• Hour (sidereal): 1/24 of a sidereal day.
• Minute (sidereal): 1/60 of a sidereal hour.
• Second (sidereal): 1/60 of a sidereal minute.

These everyday units of time help us coordinate everything from our daily routines to space flight. Familiarity with them helps ensure clearer communication, scheduling, and scientific observation.