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Time Converter
Convert between nanoseconds, seconds, hours, days, weeks, calendar years, and astronomical epochs.
Popular Time Conversions
Complete Unit Reference & Conversion Ratios
Time Reference & Conversion Factors
Base reference unit: Seconds (s)
| Unit Name | Symbol | Classification | Value in Seconds | Description |
|---|---|---|---|---|
| Nanoseconds | ns | ๐น Standard Units (SI & Everyday) | 1 ns = 1.0000e-9 s | 1 nanosecond = 10โปโน seconds |
| Microseconds | ยตs | ๐น Standard Units (SI & Everyday) | 1 ยตs = 0.000001 s | 1 microsecond = 10โปโถ seconds |
| Milliseconds | ms | ๐น Standard Units (SI & Everyday) | 1 ms = 0.001 s | 1 millisecond = 10โปยณ seconds = 1,000 ยตs |
| Seconds | s | ๐น Standard Units (SI & Everyday) | 1 s = 1 s | SI base unit of time (defined by Caesium-133 resonance) |
| Minutes | min | ๐น Standard Units (SI & Everyday) | 1 min = 60 s | 1 minute = 60 seconds |
| Hours | h | ๐น Standard Units (SI & Everyday) | 1 h = 3,600 s | 1 hour = 60 minutes = 3,600 seconds |
| Days | d | ๐น Standard Units (SI & Everyday) | 1 d = 86,400 s | 1 standard day = 24 hours = 86,400 seconds |
| Weeks | wk | ๐น Standard Units (SI & Everyday) | 1 wk = 604,800 s | 1 week = 7 days = 168 hours = 604,800 seconds |
| Fortnights | fn | ๐น Standard Units (SI & Everyday) | 1 fn = 1,209,600 s | 1 fortnight = 14 days = 2 weeks = 1,209,600 seconds |
| Years (Average Gregorian - 365.2425 d) | yr (avg) | ๐ Calendar & Astronomy | 1 yr (avg) = 31,556,952 s | Average Gregorian calendar year = 365.2425 days = 31,556,952 s |
| Years (Common Calendar - 365 d) | yr (365d) | ๐ Calendar & Astronomy | 1 yr (365d) = 31,536,000 s | Standard non-leap year = 365 days = 31,536,000 s |
| Years (Leap Year - 366 d) | yr (leap) | ๐ Calendar & Astronomy | 1 yr (leap) = 31,622,400 s | Leap year with 29 Feb = 366 days = 31,622,400 s |
| Years (Julian Astronomy - 365.25 d) | yr (jul) | ๐ Calendar & Astronomy | 1 yr (jul) = 31,557,600 s | Scientific astronomical Julian year = exactly 365.25 days = 31,557,600 s |
| Months (Average Gregorian - 30.44 d) | mo (avg) | ๐ Calendar & Astronomy | 1 mo (avg) = 2,629,746 s | 1/12th of a Gregorian year โ 30.436875 days โ 2,629,746 s |
| Months (Standard 30 Days) | mo (30d) | ๐ Calendar & Astronomy | 1 mo (30d) = 2,592,000 s | Standard commercial month = exactly 30 days = 2,592,000 s |
| Months (Synodic Lunar - 29.53 d) | mo (lunar) | ๐ Calendar & Astronomy | 1 mo (lunar) = 2,551,442.976 s | Complete lunar phase cycle = 29.53059 days โ 2,551,443 s |
| Decades | dec | ๐ Calendar & Astronomy | 1 dec = 315,569,520 s | 1 decade = 10 average Gregorian years โ 3.1557 ร 10โธ s |
| Centuries | cent | ๐ Calendar & Astronomy | 1 cent = 3,155,695,200 s | 1 century = 100 average Gregorian years โ 3.1557 ร 10โน s |
| Millennia | mill | ๐ Calendar & Astronomy | 1 mill = 31,556,952,000 s | 1 millennium = 1,000 average Gregorian years โ 3.1557 ร 10ยนโฐ s |
| Shakes (Nuclear Physics) | shake | โ๏ธ Ultrafast Physics & Nuclear | 1 shake = 1.0000e-8 s | 1 shake = 10 nanoseconds = 10โปโธ s (generation time in nuclear reactions) |
| Picoseconds | ps | โ๏ธ Ultrafast Physics & Nuclear | 1 ps = 1.0000e-12 s | 1 picosecond = 10โปยนยฒ seconds (laser pulses) |
| Femtoseconds | fs | โ๏ธ Ultrafast Physics & Nuclear | 1 fs = 1.0000e-15 s | 1 femtosecond = 10โปยนโต seconds (molecular vibration time) |