네트워크 지연
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장치 시간 진단
시계 오차 테스트
Compare your device clock with network-calibrated atomic time. Use the offset, delay, and accuracy estimate to decide whether your computer needs a time sync check.
장치 시계 오프셋
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보정 중○ 동기화 중
Measuring network delay and comparing your device clock with calibrated time.
예상 정확도
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마지막 동기화
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What It Means
Positive offset means calibrated time is ahead of your device clock. Negative offset means your device clock is ahead.
실시간 비교
- 장치 시간
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- 원자 시간
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진단 보고서
Copy this report when troubleshooting login, certificate, logging, or distributed-system time issues.
Time.ms 시계 오차 보고서
Under 100 ms
Usually excellent for browser, logging, and most user-facing workflows.
Over 1 second
Worth checking automatic time sync, VPN behavior, VM host time, or system time settings.
Over 1 minute
Can break authentication, certificates, scheduled jobs, and audit trails.
Related Time Tools
After checking drift, convert timestamps, inspect UTC, or use the NTP setup guide to correct system time.
시계 오차 FAQ
What is clock drift?
Clock drift is the difference between your device clock and a more reliable time reference.
What offset is acceptable?
A few hundred milliseconds is usually fine for browsing, while authentication and distributed systems often need tighter alignment.
How does this test estimate accuracy?
Time.ms measures network round-trip delay and uses half that delay plus a small browser timing allowance.