Convert any time between 40+ world time zones instantly. Live clocks, day-change detection, DST awareness, and quick IST presets - all free, browser-based, and 100% private.
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Universal Coordinated Time
All conversions run in your browser. Zero data stored or uploaded.
No sign-up, no API calls. Everything runs in your browser for instant, private results.
Pick the From and To time zones from the dropdown menus. Use a quick preset for popular routes like IST → New York with a single click.
Select the date in DD/MM/YYYY format and the time in HH:MM AM/PM. Or click "Use Now" to auto-fill the current time in your from zone.
Hit Convert Time and results appear instantly. The tool uses your browser's built-in timezone database - accurate, DST-aware, no server needed.
See the converted time, date (with day-change warning if applicable), UTC offset of both zones, and the exact time difference between them.
A time zone converter calculates the corresponding time in a different part of the world for any given date and time. When it is 3:00 PM in Mumbai (IST), it is simultaneously 9:30 AM in London, 4:30 AM in New York, and 7:30 PM in Tokyo. A time zone converter does this math instantly and accurately - accounting for UTC offsets, DST, and half-hour and quarter-hour offsets like IST (UTC+5:30) and Nepal (UTC+5:45).
Our free online time zone converter covers 40+ major world time zones across all regions, uses your browser's built-in IANA timezone database for DST accuracy, and requires no internet connection once the page loads.
Uses the browser's native Intl.DateTimeFormat API - the same timezone database that powers your operating system. DST transitions handled automatically.
No API calls, no server requests. All conversions happen locally in your browser. Your dates and times are never transmitted anywhere.
Conversion completes in milliseconds with no server round-trip. Live clocks update every second so you always see the current time in both zones.
When a conversion crosses midnight, the tool shows whether the result falls on the same day, the next day (+1), or the previous day (−1) - critical for scheduling international meetings.
India Standard Time (IST) is UTC+5:30. India does not observe Daylight Saving Time - IST remains UTC+5:30 throughout the year. Here are the most commonly needed IST conversions:
| City / Zone | When IST is 12:00 PM | Offset from IST | DST? |
|---|---|---|---|
| Mumbai / Delhi (IST) | 12:00 PM | - | No |
| Dubai (GST) | 10:30 AM | −1h 30m | No |
| London (GMT/BST) | 6:30 AM / 7:30 AM | −5h 30m / −4h 30m | Yes |
| Paris / Berlin (CET) | 7:30 AM / 8:30 AM | −4h 30m / −3h 30m | Yes |
| Moscow (MSK) | 9:30 AM | −2h 30m | No |
| Singapore / Kuala Lumpur | 2:30 PM | +2h 30m | No |
| Beijing / Shanghai (CST) | 2:30 PM | +2h 30m | No |
| Tokyo (JST) | 3:30 PM | +3h 30m | No |
| Sydney (AEST) | 4:30 PM / 5:30 PM | +4h 30m / +5h 30m | Yes |
| New York (ET) | 2:30 AM / 3:30 AM | −9h 30m / −8h 30m | Yes |
| Chicago (CT) | 1:30 AM / 2:30 AM | −10h 30m / −9h 30m | Yes |
| Los Angeles (PT) | 11:00 PM (prev) / 12:00 AM | −13h 30m / −12h 30m | Yes |
Every time zone is defined by its offset from Coordinated Universal Time (UTC). A positive offset (e.g., UTC+5:30 for IST) means the zone is ahead of UTC - when UTC is noon, IST is 5:30 PM. A negative offset (e.g., UTC−5:00 for New York EST) means behind UTC - when UTC is noon, New York is 7:00 AM.
Daylight Saving Time is the practice of advancing clocks by 1 hour in summer to make better use of daylight. Countries that observe DST - including the USA, UK, most of Europe, and Australia - shift their UTC offset seasonally. This means the time difference between IST and London changes through the year:
Our converter uses your browser's timezone database (IANA/TZDB) which automatically knows whether DST is in effect on any given date in any given zone - so you always get the correct result without manually tracking DST calendars.
Intl.DateTimeFormat Web API - the same IANA timezone database used by your OS and all major browsersA tool-first platform. Every feature follows strict design and accuracy principles.
Both selected time zones show live clocks updating every second - so you always see the real current time in each zone before you even convert.
When a time conversion crosses midnight, a clear badge shows whether the result lands on the Same Day, Next Day (+1), or Previous Day (−1). Critical for scheduling international meetings.
Uses your browser's built-in IANA timezone database - the same one that powers your phone and computer. DST transitions are handled automatically for any date, any zone.
Swap From and To zones with one click. Or use quick presets for the most common routes - IST to New York, London, Dubai, LA, Singapore, and Tokyo - populated and converted instantly.
All conversions run entirely in your browser. No server requests, no API calls, no account required, no data stored. Your dates and times never leave your device.
IST is the default From zone. Quick presets cover the routes most used by Indian professionals, students, and travellers. The DD/MM/YYYY date format matches Indian standards.
From remote workers scheduling global calls to travellers landing in new cities - anyone who works across time zones.
The converter uses your browser's built-in Intl.DateTimeFormat API, which contains the complete IANA timezone database. When you enter a date and time in the From zone, the tool calculates the exact UTC equivalent - accounting for that zone's current offset - and then converts it to the selected To zone. No internet connection is needed after the page loads, and no data leaves your device.
Yes, fully automatically. The IANA timezone database used by your browser knows the exact dates on which every country starts and ends DST each year. When you enter a date, the converter checks whether DST is in effect on that specific date in both zones and applies the correct offset. A DST notice appears when one or both selected zones observe DST, so you're always aware.
IST stands for India Standard Time. It is UTC+5:30 - five hours and thirty minutes ahead of Coordinated Universal Time. India does not observe Daylight Saving Time, so IST remains UTC+5:30 throughout the entire year. This makes IST straightforward to convert: just add or subtract a fixed 5 hours 30 minutes from UTC, without seasonal adjustment.
When a time conversion crosses midnight, the calendar date in the To zone can be different from the calendar date in the From zone. The day-change badge shows one of three states: Same Day (no date change), Next Day (+1) (the conversion falls one day later), or Previous Day (−1) (the conversion falls one day earlier). For example, converting 10:00 PM IST to Los Angeles (PT) results in 9:30 AM on the previous calendar day.
Yes. The converter works for any date from 1970 onwards and up to 10 years in the future. Simply select the desired date from the DD/MM/YYYY dropdowns. For historical dates, note that DST rules in some countries have changed over time - the browser's timezone database captures the rules in effect for major zones, but very old historical conversions before 1970 are not supported.
The live clock strip at the top of the converter shows the current real-world time in both your selected From and To zones, updated every second. These clocks use the same browser timezone API as the converter itself, so they always reflect the true current time in each zone - including DST. Changing the zone selection in either dropdown immediately updates the corresponding clock label and time.
Completely private. Every calculation runs locally in your browser. No dates, times, or timezone preferences are sent to any server, stored in a database, or shared with anyone. There is no login, no account, and no tracking of what you convert. The tool works entirely offline once the page is loaded.
Yes. Zones with non-standard offsets are fully supported, including IST (UTC+5:30), Nepal (UTC+5:45), Afghanistan (UTC+4:30), Iran (UTC+3:30, or UTC+4:30 during DST), and Myanmar (UTC+6:30). The converter handles all of these correctly because it relies on the browser's IANA database rather than a manually entered offset, ensuring precision for every zone in the list.
All free, browser-based, and privacy-first. No login required.
Pick any two zones, enter your date and time, and get the exact converted result - free, private, instant.
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