The Atomic Precision World Clock
Live Atomic Time Display
Coordinated Universal Time (UTC)
Your Local Time
Directory
Browse precise atomic time for 90+ cities worldwide.
Calculator
Calculate future or past dates across any timezone.
Converter
Compare times between cities instantly.
A Tool Built for Accuracy and Precision
Why Atomic Clock Precision Matters
In a globally connected world, precise time synchronization is critical. Atomic clocks provide the most accurate time references available, essential for secure financial transactions, satellite navigation (GPS), telecommunications networks, and scientific research. iTime.live brings this precision directly to your device via a direct connection to PTB atomic servers.
How We Ensure Accuracy
iTime.live synchronizes directly with master atomic clocks maintained by national laboratories like Germany's PTB (Physikalisch-Technische Bundesanstalt). Our servers continuously adjust for network latency and ensure that the time displayed is accurate to within microseconds, providing unmatched reliability for your global time needs.
✅ Key Features & Benefits
- Accurate to the microsecond (verified < 0.5μs offset).
- Time for all major cities worldwide.
- Automatic detection of your local time difference.
- Ideal for international calls, scheduling, and precise planning.
🔬 PTB Technical Excellence
The Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig, Germany operates primary caesium fountain clocks that serve as the official time standard for the European Union. Through direct connection to PTB facilities, iTime.live delivers laboratory-grade time accuracy to web browsers worldwide.