SpaceTime Tools
Simple tools for converting time, coordinates, and satellite TLE data
Enter a date/time to convert.
Converted Time
Click the ⤺ icon to use a converted value as the input.
UT1 (= UTC + DUT1)
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Julian Century
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TAI (= UTC + DAT)
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GPS Time
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TT
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Epoch Time (TLE)
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Time Unit Information
- UTC (Coordinated Universal Time): Global standard time, adjusted with leap seconds.
- UT1 (Universal Time 1): Time based on Earth's actual rotation.
- TAI (International Atomic Time): Uniform atomic time scale, without leap seconds.
- TT (Terrestrial Time): Terrestrial reference time for astronomy (TAI + 32.184s).
- Julian Century: Time scale in centuries since the J2000 epoch.
- GPS Time: Time used by GPS satellites, no leap seconds (TAI - 19s).