Atomic Time Calculator
Convert between different atomic and astronomical time scales including UTC, TAI, GPS Time, and Terrestrial Time.
Live Atomic Clocks
UTC17:06:20
TAI17:06:57
GPS17:06:38
TT17:07:30
TAI - UTC = 37s (includes 27 leap seconds)
Time Scale Offsets
TAI - UTC37 seconds
GPS - UTC18 seconds
TT - UTC69.184 seconds
GPS Time Info
GPS Week
2420
Second of Week
345,600
Other Time Formats
Julian Date2461189.00
Modified Julian Date61188.50
Unix Timestamp1779926400
Leap Seconds27
Time Scale Definitions
- TAI: International Atomic Time, continuous count of SI seconds
- UTC: Coordinated Universal Time, TAI with leap seconds for Earth rotation
- GPS: GPS system time, no leap seconds since Jan 1980
- TT: Terrestrial Time, for astronomical calculations
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.