Network Time Tools
Check NTP server status, synchronize time, convert timezones, and calculate network latency. Essential for time-sensitive network operations.
NTP Server Status
Check the status and offset of NTP servers
Common servers:
pool.ntp.org
time.google.com
time.cloudflare.com
time.windows.com
time.apple.com
Enter an NTP server and click "Check NTP"
System Time
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Timezone Converter
Convert times between different timezones
Epoch/Unix Time Converter
Convert between epoch timestamps and human-readable dates
Unix Epoch
1773530040
ISO 8601
2026-03-14T18:14:00-05:00
UTC
2026-03-14 23:14:00
Local
2026-03-14 18:14:00
Network Latency Calculator
Calculate time-based network metrics
Round Trip Time
50 ms
per packet
Total Time
50.0 s
for 1000 packets
Packets/Second
20
max theoretical
Distance (fiber)
~10 km
approx. fiber optic
Distance (copper)
~5 km
approx. copper
Distance (wireless)
~15 km
approx. wireless
Speed of Light Calculations
Light in fiber: ~200,000 km/s (approx. 5 µs per km). These are theoretical minimum distances based on speed of light - real networks will have additional delays from routing, switching, and processing.
About Network Time
Network Time Protocol (NTP) is essential for synchronizing clocks across computer networks. Accurate timekeeping is critical for logging, authentication, security protocols, and distributed systems.
NTP Stratum Levels
| Stratum | Description |
|---|---|
| 0 | Atomic clocks, GPS receivers, radio clocks (not used on network) |
| 1 | Primary time servers directly connected to stratum 0 devices |
| 2 | Secondary servers synchronized with stratum 1 servers |
| 3 | Tertiary servers - most users connect here |
| 4+ | Further from source, less accurate |
Common NTP Pool Servers
| Server | Location | Stratum |
|---|---|---|
| pool.ntp.org | Global | 2-3 |
| time.google.com | Global | 1 |
| time.cloudflare.com | Global | 1 |
| time.windows.com | Global | 2 |
| time.apple.com | Global | 2 |