Time Converter
Time measures the duration between events. The SI base unit is the second. Larger units build up through minutes, hours, and days. Calendar month and year values here use the average Gregorian length, so they are approximate for any specific month or year; astronomy uses its own precisely defined years.
36 units supported Base unit second (s)
Multiply the number of seconds by 0.0166666666667 to get minutes. How this is calculated
About time conversion
Time conversion is commonly needed when scheduling, timers, project planning, and physics. Month and year use average calendar lengths, so they are approximate for any specific date range.
Popular conversions
Convert Second to other time units
1 s expressed in every other time unit on this site.
- Second s 1
- Millisecond ms 1,000
- Microsecond µs 1,000,000
- Nanosecond ns 1,000,000,000
- Picosecond ps 1,000,000,000,000
- Femtosecond fs 1,000,000,000,000,000
- Attosecond as 1e+18
- Shake shake 100,000,000
- Planck Time tP 1.8548584e+43
- Minute min 0.016666667
- Hour h 0.00027777778
- Day d 0.000011574074
- Week wk 0.0000016534392
- Fortnight fortnight 8.2671958e-7
- Month mo 3.8026486e-7
- Quarter qtr 1.2675495e-7
- Year yr 3.1688739e-8
- Decade decade 3.1688739e-9
- Century century 3.1688739e-10
- Millennium millennium 3.1688739e-11
- Day (sidereal) d (sid) 0.000011605763
- Hour (sidereal) h (sid) 0.00027853831
- Minute (sidereal) min (sid) 0.016712299
- Second (sidereal) s (sid) 1.0027379
- Week (Julian) wk (Jul) 0.0000016534392
- Month (synodic) mo (syn) 3.9193494e-7
- Year (Julian) yr (Jul) 3.1688088e-8
- Year (leap) yr (leap) 3.1623153e-8
- Year (tropical) yr (trop) 3.1688761e-8
- Year (sidereal) yr (sid) 3.1687536e-8
- Year (common) yr (365d) 3.1709792e-8
- Quinquennial 5 yr 6.3419584e-9
- Septennial 7 yr 4.5299703e-9
- Octennial 8 yr 3.963724e-9
- Novennial 9 yr 3.5233102e-9
- Quindecennial 15 yr 2.1139861e-9
Complete list of time units
All 36 units this converter supports, each stated against the second (s).
| Unit | Symbol | System | In seconds | Conversions |
|---|---|---|---|---|
| Second | s | SI | base unit (s) | seconds to minutesseconds to milliseconds |
| Millisecond | ms | SI | 1 ms = 0.001 s | milliseconds to seconds |
| Microsecond | µs | SI | 1 µs = 0.000001 s | — |
| Nanosecond | ns | SI | 1 ns = 1e-9 s | — |
| Picosecond | ps | SI | 1 ps = 1e-12 s | — |
| Femtosecond | fs | SI | 1 fs = 1e-15 s | — |
| Attosecond | as | SI | 1 as = 1e-18 s | — |
| Shake | shake | Other | 1 shake = 1e-8 s | — |
| Planck Time | tP | Other | 1 tP = 5.391247e-44 s | — |
| Minute | min | Other | 1 min = 60 s | minutes to secondsminutes to hours |
| Hour | h | Other | 1 h = 3,600 s | hours to minuteshours to days |
| Day | d | Other | 1 d = 86,400 s | days to hoursdays to weeks |
| Week | wk | Other | 1 wk = 604,800 s | weeks to days |
| Fortnight | fortnight | Other | 1 fortnight = 1,209,600 s | — |
| Month | mo | Other | 1 mo = 2,629,746 s | months to daysmonths to years |
| Quarter | qtr | Other | 1 qtr = 7,889,238 s | — |
| Year | yr | Other | 1 yr = 31,556,952 s | years to daysyears to months |
| Decade | decade | Other | 1 decade = 315,569,520 s | — |
| Century | century | Other | 1 century = 3,155,695,200 s | — |
| Millennium | millennium | Other | 1 millennium = 31,556,952,000 s | — |
| Day (sidereal) | d (sid) | Other | 1 d (sid) = 86,164.0905 s | — |
| Hour (sidereal) | h (sid) | Other | 1 h (sid) = 3,590.17041667 s | — |
| Minute (sidereal) | min (sid) | Other | 1 min (sid) = 59.8361736111 s | — |
| Second (sidereal) | s (sid) | Other | 1 s (sid) = 0.9972695602 s | — |
| Week (Julian) | wk (Jul) | Other | 1 wk (Jul) = 604,800 s | — |
| Month (synodic) | mo (syn) | Other | 1 mo (syn) = 2,551,443.84 s | — |
| Year (Julian) | yr (Jul) | Other | 1 yr (Jul) = 31,557,600 s | — |
| Year (leap) | yr (leap) | Other | 1 yr (leap) = 31,622,400 s | — |
| Year (tropical) | yr (trop) | Other | 1 yr (trop) = 31,556,930 s | — |
| Year (sidereal) | yr (sid) | Other | 1 yr (sid) = 31,558,149.54 s | — |
| Year (common) | yr (365d) | Other | 1 yr (365d) = 31,536,000 s | — |
| Quinquennial | 5 yr | Other | 1 5 yr = 157,680,000 s | — |
| Septennial | 7 yr | Other | 1 7 yr = 220,752,000 s | — |
| Octennial | 8 yr | Other | 1 8 yr = 252,288,000 s | — |
| Novennial | 9 yr | Other | 1 9 yr = 283,824,000 s | — |
| Quindecennial | 15 yr | Other | 1 15 yr = 473,040,000 s | — |
No unit in this category matches that search.
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Frequently asked questions
What is the base unit for time?
Time conversions on this site are calculated against the second (s).
Which time units can I convert?
You can convert between 36 units, including second, millisecond, microsecond, nanosecond, and more.
Where is time conversion useful?
It is commonly needed when scheduling, timers, project planning, and physics.
Does this converter mix measurement systems?
The converter supports SI, Other units and keeps their exact definitions separate so results stay accurate.
Related categories
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.