Time Zone Converter — Free Time Zone Calculator & Meeting Planner

Time Zone Converter — Free Time Zone Calculator & Meeting Planner. Free time zone converter: convert any date and time between 400+ world time zones (UTC to EST, PST to EST, IST to EST…), see UTC offsets, hour differences and working hours at a glance.

Our free time zone converter turns any date and time into the local time of every city you care about.

Pick a date, a time and a source time zone, then compare it side by side with as many destinations as you like — New York, London, Paris, Dubai, India, Tokyo, Sydney or any of the 400+ IANA zones built into your browser.

Each card shows the converted time, the date and weekday, the UTC offset and the exact hour difference, so this time zone calculator answers everyday questions such as UTC to EST, PST to EST, EST to PST or IST to EST in one click, without having to remember offsets or daylight-saving rules.

Planning a call across continents? Use it as a meeting planner for time zones: every result is tagged with a working-hours badge (09:00–17:00 local time) and a "+1 day / −1 day" marker when the meeting falls on a different calendar day.

Daylight saving time is handled automatically for every region, so a 9:00 AM New York meeting in January and in July maps correctly to London, Berlin or Tokyo.

Switch between 24-hour and 12-hour (AM/PM) formats, jump back to the current time with Now, or swap the source with the first destination to see the schedule from the other side.

For Unix timestamps and ISO 8601 dates use our Epoch Converter, and to count days between two dates try Days Between Dates.

Everything runs locally in your browser with the built-in Intl time zone database — no schedules, itineraries or meeting details are sent to a server.

UK conversions such as GMT to EST and BST to EST switch automatically when daylight saving time starts or ends.

Copy all converted times as a ready-to-paste list for an email, Slack message or calendar invite, or share a link that restores your date, source zone and destination list for teammates.

Related tools: ETA Calculator, Age Calculator, Crontab Generator for scheduling cron jobs in UTC, and Epoch Converter.

Frequently asked questions

How do I convert a time to another time zone?

Pick a Date and Time, then choose the From time zone; it starts with your device's zone and the current time. The Converted times cards show the matching time in UTC, New York, London and Tokyo by default. Use Add a time zone to search for any city or region, and the cross on a card to remove it.

How do I convert UTC to EST or PST to EST?

Set From time zone to UTC, or America/Los_Angeles for Pacific time, and add America/New_York for Eastern time. Zones are listed by region and city, so search by city name. Each card shows the offset in force on your date, such as UTC-05:00 in winter or UTC-04:00 in summer for New York.

Does the time zone converter handle daylight saving time?

Yes. Offsets come from your browser's built-in time zone database for the exact date you enter, so the same meeting can map to different local times in January and July. The offsets printed in the zone lists also follow the date and time you picked.

What do Working hours and +1 day mean?

Each card shows a Working hours tag when the converted time is between 09:00 and 17:00 local time, otherwise Outside working hours. A +1 day or -1 day marker means the converted time falls on the next or previous calendar day compared with the source.

What do Now, Swap with first zone and the 12-hour clock switch do?

Now resets the date and time to the current moment in the source zone. Swap with first zone makes the first card the new source and moves the old source into the list. The 12-hour clock (AM/PM) switch changes how converted times are displayed.

How do I share converted times with my team?

Click Copy all times to copy a plain-text list of the source time and every converted zone for an email or chat, or Copy link to share a URL that restores the date, time, source zone, target zones and clock format. The conversion runs in your browser.

How to use this online tool

Time Zone Converter — Free Time Zone Calculator & Meeting Planner is designed for fast browser workflows when you need to format, validate, convert, decode, encode, generate, or inspect data without opening a heavy desktop app. Start with the input field or visible options, review the result, then copy or download the output for the next step.

Private processing in your browser

Time Zone Converter — Free Time Zone Calculator & Meeting Planner keeps the normal processing step local in your browser. That is useful for code snippets, tokens, documents, configuration values, text samples, and other material that should not be sent to a remote service unless you explicitly choose to share it.

When this tool is useful

Use Time Zone Converter — Free Time Zone Calculator & Meeting Planner for repeatable developer tasks, technical documentation, QA checks, quick conversions, debugging, content cleanup, and internal team workflows. The page focuses on clear inputs, immediate feedback, and output that is easy to reuse in code, reports, tickets, emails, or notes.

Practical tips

Before copying the final result, check important details such as spacing, casing, filenames, encoding, token structure, line breaks, or output format. Small checks prevent mistakes when the result is reused in source code, API requests, documentation, spreadsheets, or shared files.