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Live Seconds and Milliseconds

A precision readout for when the seconds are the point.

Sometimes only the seconds matter: syncing two devices, checking a stopwatch, timing a demonstration, or watching a clock roll over. This page puts the seconds and milliseconds front and centre with nothing else competing for attention.

Reading a millisecond display honestly

The digits update as fast as your screen refreshes — typically sixty times a second — so the last digit is always a snapshot rather than a continuous truth. For measuring an interval rather than reading an instant, a stopwatch using a monotonic clock is the right tool.

Guides about Seconds Counter

How it works Millisecond Precision In The Browser: Date.now() vs performance.now() Browsers expose two clocks with different guarantees. Here is how Date.now() and performance.now() differ, why background tabs throttle timers, and why animation frames beat intervals. 6 min read

More livetime.now pages

Live Clock A live ticking clock with milliseconds, redrawn every animation frame. Fullscreen Clock A big clock for a second monitor, a lobby screen or a stream — with a wake lock so it stays on. Countdown Timer Set minutes, start, and get a clear countdown with an alert at zero. Stopwatch Start, stop, lap — elapsed time measured properly.

Frequently asked questions

Is millisecond precision meaningful here?
For reading a rough instant, yes. For measuring intervals, use the stopwatch, which uses a monotonic timer unaffected by clock adjustments.
Why does the last digit skip values?
Because the display refreshes about sixty times a second, so it samples rather than showing every millisecond.