🌍 Time Zone Converter

How the Time Zone Converter Works

Pick a date and time, the time zone it belongs to, and the time zone you want to convert to. The converter works out the exact moment in Coordinated Universal Time (UTC) and then shows what the clock reads in the other zone. It uses the IANA time zone database built into your browser, so daylight saving time changes, historical offsets, and half-hour or 45-minute zones (such as India, Newfoundland, or Nepal) are handled correctly without any manual adjustment.

Below the result you also get the same moment in major world cities — useful for scheduling calls, webinars, or live events across continents.

Formula

UTC time   = local time in source zone − source zone UTC offset
Target time = UTC time + target zone UTC offset
Example: 09:00 in New York (UTC−4 in summer) = 13:00 UTC = 18:30 in New Delhi (UTC+5:30)

UTC offsets change during daylight saving time, so the offset used is the one in effect on the selected date, not today's.

How to Use It

1. Choose the date and time you want to convert.
2. Select the time zone that date and time belongs to (your own zone is preselected).
3. Select the time zone you want to convert to.
4. Read the converted time, the difference in hours, and the same moment in major world cities.

Frequently Asked Questions

Does this time zone converter handle daylight saving time?

Yes. It uses the IANA time zone database built into modern browsers, which includes daylight saving rules for every region. The offset applied is the one in effect on the date you select, so conversions for future or past dates are correct.

What is the difference between GMT and UTC?

For everyday scheduling they show the same time. UTC (Coordinated Universal Time) is the modern scientific time standard; GMT (Greenwich Mean Time) is a time zone used in the UK and some other countries during winter. The UK switches to BST (UTC+1) in summer, while UTC never changes.

Why do some time zones have 30- or 45-minute offsets?

Several countries chose offsets that better match their geographic position, such as India (UTC+5:30), Iran (UTC+3:30), Newfoundland (UTC−3:30), and Nepal (UTC+5:45). This converter handles all of them.

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Formula and content last reviewed: September 2026. All calculations run in your browser — nothing you enter is sent to or stored on our servers.