Satellite Time Converter | GPS, BeiDou, GLONASS Time Systems
Professional satellite time system converter supporting GPS Time, BeiDou Time (BDT), GLONASS Time. Convert between different GNSS time systems.
GPS Time System Results
BeiDou Time System Results
Satellite Time System Knowledge
GPS Time System (GPST)
GPS time started from January 6, 1980 00:00:00 UTC. It's a continuous time scale that doesn't account for Earth's rotation irregularities or leap seconds. As of 2024, GPS time is 18 seconds ahead of UTC.
BeiDou Time System (BDT)
BeiDou time started from January 1, 2006 00:00:00 UTC. BDT is synchronized with UTC but doesn't include leap seconds. BDT = UTC + 0.
GPS Week Number
GPS time is expressed in weeks and seconds of week. One week = 7 days = 604800 seconds. Week numbers start from 0 and roll over every 1024 weeks. First rollover occurred on August 21, 1999 23:59:47 UTC.
BeiDou Week Number
Similar to GPS, BDS uses week numbers and seconds of week. Counting started from 2006, with 604800 seconds per week. Due to its later start date, no week number rollover has occurred yet.
Leap Seconds
Leap seconds reconcile atomic time with Earth's rotation. GPS accumulates the difference without using leap seconds, while BDS handles them through system time synchronization.
Time Formats
Both systems support multiple time formats: week+seconds, day of year, Modified Julian Date (MJD), etc. Day of year counts from day 1 of each year, range 1-366.