Unix timestamp converter
Enter your values to see the result, check the formula and copy your calculation.
Enter your values, then calculate.
Your calculation stays in your browser.
The formula, explained
UTC date = 1970-01-01 + secondsEnter seconds, not milliseconds. Results show UTC and your browser’s local time.
An example to check
Using the starting values below, the calculation gives:
One UTC instant, different local times — The main result is in UTC. The local time in the breakdown represents the same instant in the browser’s time zone.
This field expects seconds since 1 January 1970. Divide a millisecond timestamp by 1,000 first. Keep UTC or the time zone when sharing a date to avoid ambiguity.
How to use this tool
Check the required inputs: seconds since january 1, 1970 utc.
Choose the units and options that match your task. Calculate, check the result and use Copy or Print to keep a record. Rounding applies to the display; keep more precision in intermediate steps.
Can I use a decimal comma?
Yes. Numeric fields accept 12.5 or 12,5 and spaces for thousands, such as 1 234.50. Do not mix a point and comma in one number.
Where are my inputs processed?
Calculations run in your browser. Form values are not sent to Analytics. Copying, printing, sharing or opening an external service is your choice.
Method and interface checked on 2026-09-19 · Report an error