Convert milliseconds (ms) to seconds (s) or seconds to milliseconds instantly. Handy for CSS animations, transitions and JavaScript timing. Everything runs in your browser — no login, no installation.
What it is, who it's for, how it works and why you'd use it.
Ms to S Converter is a tool that instantly converts milliseconds (ms) to seconds (s) and back.
It is for front-end developers calculating CSS animation and transition durations, or converting between ms and s for JavaScript setTimeout and setInterval.
Enter an ms or s value and the result appears instantly in your browser. Use the Swap button to flip the conversion direction.
While 1000ms = 1s seems simple, larger values are easy to miscalculate — this tool gives the answer instantly so you can copy and move on.