Time Zone Converter

All tools

Convert a time between any two of 30+ major world time zones instantly. See the UTC equivalent and the exact difference in hours. Works offline in your browser.

Converted time – –
Source time –
UTC time –
Time difference –
Conversion uses your browser's built-in time zone data, including current daylight saving rules for the selected date. No data leaves your device.

About Time Zone Converter

The time zone converter takes a time in one zone and shows the equivalent in another, choosing from more than 30 major world time zones. Alongside the converted time you see the source time, the UTC equivalent and the exact difference in hours, labeled as ahead or behind — handy when the gap is not obvious.

Daylight saving time is the usual trap in manual conversions, and this tool avoids it by using your browser’s built-in time zone database, which applies the current DST rules for the zones involved. A swap button reverses the direction instantly, so checking both ends of a call takes one click.

Use it to schedule meetings across offices, plan calls with family abroad or confirm webinar start times. The converter is free, works offline once loaded and performs every calculation on your device — no times or locations are sent to any server.

How to use Time Zone Converter

  1. Enter the time you want to convert.
  2. Pick the source zone in the “From time zone” list.
  3. Pick the target zone in the “To time zone” list.
  4. Read the converted time, the UTC equivalent and the hour difference; use “Swap zones” to reverse the conversion.

Frequently asked questions

Yes. It relies on your browser’s time zone data, which includes current daylight saving rules, so conversions between zones that observe DST come out correct without manual adjustment.

UTC is the common reference all zones are defined against. Showing it lets you double-check a conversion or share an unambiguous time with people in many different countries at once.

It tells you how the target zone relates to the source: “5 h ahead” means clocks in the target zone show a later time, while “behind” means an earlier one.

Yes. All zone math runs in your browser using its built-in database, so once the page has loaded, the converter keeps working offline and nothing you enter leaves your device.

Some regions use offsets of 30 or 45 minutes, so a half-hour difference between certain zone pairs is normal and reflects their real official time.
Share this
Related Tools
Date Difference Calculator Calculate the time between two dates in years, months, days, weeks and hours, or add and subtract durations — with optional business days. Free, in your browser. Free
Age Calculator Find your exact age in years, months and days from a date of birth, plus total months, weeks, days and hours and a countdown to your next birthday. Free
Date Add & Subtract Calculator Add or subtract years, months, weeks and days from any date to find the resulting date, its weekday, ISO format and how many days it is from today. Free
Business Days Calculator Count the working days between two dates, or add a number of business days to a start date, automatically skipping weekends. Free
Time Duration Calculator Calculate the duration between a start and end time in hours and minutes, with totals in minutes, seconds and decimal hours, including overnight spans. Free
Sleep Calculator Find the best times to fall asleep or wake up based on 90-minute sleep cycles, so you wake between cycles feeling refreshed rather than groggy. Free
Need help?
Found an issue with this tool? Let our team know.
Report an issue

Add this free tool to your own website — copy and paste the code below.