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Time Zone Converter & World Clock

Convert time between any two time zones, or compare up to 4 cities at once — DST handled automatically.

100% free No sign-up Private · runs in your browser

How to use the free online time zone converter

Choose your city and the target city (or up to 4 for the world clock).
Set a time in either box.
Read the converted time instantly.
Copy or screenshot for scheduling.

About this tool

Convert time between any two time zones instantly, or compare four cities at once with a live world clock. Pick cities from a searchable list, set a time, and see the matching time everywhere else — with DST handled automatically. Perfect for remote work, calls, travel planning and international meetings.

Key features

Searchable city list
2-way conversion
4-city world clock
DST handled automatically

Privacy first: every calculation and generation runs 100% locally in your web browser using the Web Crypto API. Your input never touches a server — nothing is stored, logged or sold.

Read the guide

Productivity · 4 min read

Time zones, UTC and DST — the 5-minute explainer

How time zones actually work, why UTC exists, and how to convert times across the world without mistakes.

Frequently asked questions

All major zones plus searchable cities worldwide (UTC, US, Europe, Asia, Australia and more). DST is applied automatically where in effect.

Pick your city and the other party's city, set the time, and read the converted time instantly. Use the world clock to compare up to 4 cities at a glance.

Yes — the current DST rules are built in and applied automatically, so summer/winter changes never skew your conversions.