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A Unit of Time is a measurement unit used to measure duration passing; each unit’s equivalent should be given in the SI base unit, seconds, if possible; variable-length units (such as months) may have no specific equivalent. Particular lengths of time are not appropriate.
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37 Unit Of Time topics matching:
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| x name | x image | x Time In Seconds (s) | x Measurement System | x article |
| x Second | 1 s | International System of Units |
The second (SI symbol: s), sometimes abbreviated sec., is the name of a unit of time, and is the International System of Units (SI) base unit of time. It may be measured using a clock.
Early definitions of the second were based on the motion of the...
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| x Minute |
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60 s | Non-SI units accepted for use with SI |
A minute is a unit of measurement of time or of angle.
The minute is a unit of time equal to 1/60th of an hour or 60 seconds. In the UTC time scale, a minute occasionally has 59 or 61 seconds; see leap second. The minute is not an SI unit; however,...
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| x Hour |
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3,600 s | Non-SI units accepted for use with SI |
The hour (common symbol h or hr) is a unit of time. It is not an SI unit but is accepted for use with the SI.
In modern usage, an hour is a unit of measurement of time of the duration of 60 minutes, or 3600 seconds. It is 1/24 of a median Earth day....
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| x Day |
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86,400 s | Non-SI units accepted for use with SI |
A day (symbol d) is a unit of time equivalent to approximately 24 hours. It is not an SI unit but it is accepted for use with SI. The SI unit of time is the second.
The word 'day' can also refer to the (roughly) half of the day that is not night,...
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| x Planck time | 0 s | Planck units |
In physics, the Planck time, (tP), is the unit of time in the system of natural units known as Planck units. It is the time required for light to travel, in a vacuum, a distance of 1 Planck length. The unit is named after Max Planck, who was the...
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| x Year | 31,536,000 s |
Generally speaking, a calendar year begins on the New Year's Day of the given calendar system and ends on the day before the following New Year's Day. By convention, a calendar year consists of a natural number of days. To reconcile the calendar...
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| x Month |
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2,628,002.88 s |
The month is a unit of time, used with calendars, which is approximately as long as some natural period related to the motion of the Moon; month and Moon are cognates. The traditional concept arose with the cycle of moon phases; such months ...
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| x Week |
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604,800 s |
A week is a time unit equal to a number of days, now usually seven days. Weeks of between 4 and 20 days have been used historically in various places.
The Igbo of Nigeria have a traditional calendar with a 4-day week. This "market week" features...
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| x Tropical year |
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31,556,943.36 s |
A tropical year (also known as a solar year) is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to...
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| x Leap year |
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31,622,400 s |
A leap year (or intercalary year) is a year containing one or more extra days (or, in the case of lunisolar calendars, an extra month) in order to keep the calendar year synchronized with the astronomical or seasonal year.
For example, in the...
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| x Julian year | 31,557,600 s |
In astronomy, a Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of 86,400 SI seconds each, totalling 31,557,600 seconds. The Julian year is the average length of the year in the Julian calendar used in Western...
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| x Nest attempt | Integer |
The period of time between nest initiation and nest failure or nest success.
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| x Millennium | 31,556,736,000 s |
A millennium (pl. millenniums or millennia) is a period of time equal to one thousand years (from Latin mille, thousand, and annum, year). The term may implicitly refer to calendar millenniums; periods tied numerically to a particular dating system,...
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| x Weekly |
Weekly is a reference to the interval between events; once every week.
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| x Monthly |
Monthly is a reference to the interval between events; once every month.
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| x Epoch |
A Geological Epoch is a time division (era or period) of the geologic time scale based on rock layering which is less than a period and greater than a stage.
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| x twice monthly | ||||
| x Nanosecond | 0 s | International System of Units | ||
| x Millisecond | 0.001 s | International System of Units | ||
| x Microsecond | 0 s | International System of Units | ||
| x yottasecond | 999,999,999,999,999,983,222,784 s | International System of Units | ||
| x zettasecond | 1,000,000,000,000,000,000,000 s | International System of Units | ||
| x exasecond | 1,000,000,000,000,000,000 s | International System of Units | ||
| x petasecond | 1,000,000,000,000,000 s | International System of Units | ||
| x terasecond | 1,000,000,000,000 s | International System of Units | ||
| x gigasecond | 1,000,000,000 s | International System of Units | ||
| x megasecond | 1,000,000 s | International System of Units | ||
| x kilosecond | 1,000 s | International System of Units | ||
| x hectosecond | 100 s | International System of Units | ||
| x decasecond | 10 s | International System of Units | ||
| x decisecond | 0.1 s | International System of Units | ||
| x Centisecond | 0.01 s | International System of Units |
The centisecond is an SI-approved unit of time, equal to one hundredth of a second. The word is formed from "centi-" and "second". It is rarely used. It is sometimes called a jiffy for slang. Often, digital watches that use chronometers use...
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| x picosecond | 0 s | International System of Units | ||
| x femtosecond | 0 s | International System of Units | ||
| x attosecond | 0 s | International System of Units | ||
| x zeptosecond | 0 s | International System of Units | ||
| x yoctosecond | 0 s | International System of Units | ||
