Time Zone Converter
Convert time between different countries and plan meetings across time zones instantly. DST-aware • 45+ cities • Live clock
This tool converts a time between time zones and shows several zones side by side, which makes scheduling across regions straightforward. Daylight saving transitions are handled using your browser's own time zone database, so the offsets stay correct through the changeover dates.
Tips for Scheduling International Meetings
Make global collaboration smoother with these proven practices.
Aim for the 9 AM – 12 PM overlap window — it falls within business hours for the widest range of timezones.
Use the green / yellow / red indicators to spot who will be joining early morning or late at night.
Rotate meeting times for recurring calls so the inconvenient slot is shared fairly across team locations.
Always send calendar invites with the timezone explicitly stated to avoid confusion from DST changes.
Check the date badge (+1d / −1d) — scheduling across the International Date Line means the meeting could be on different calendar days.
If a location always gets a red card, consider an async update (Loom / written summary) rather than forcing attendance.
Common Timezone Offsets at a Glance
Quick reference for frequently used timezone combinations. Note: offsets shift by 1 hour when DST is active.
| From | To | Standard Difference |
|---|---|---|
| IST (India) | EST (New York) | IST is 10 hr 30 min ahead of EST |
| IST (India) | GMT (London) | IST is 5 hr 30 min ahead of GMT |
| IST (India) | GST (Dubai) | IST is 1 hr 30 min ahead of GST |
| IST (India) | JST (Tokyo) | IST is 3 hr 30 min behind JST |
| EST (New York) | GMT (London) | EST is 5 hr behind GMT |
| EST (New York) | PST (Los Angeles) | EST is 3 hr ahead of PST |
| GMT (London) | CET (Paris / Berlin) | GMT is 1 hr behind CET |
| SGT (Singapore) | AEST (Sydney) | SGT is 2 hr behind AEST |
About This Tool
How It Works
The converter uses the IANA timezone database built into every modern browser via the Intl.DateTimeFormat API. Enter a date and time in any timezone, and the tool instantly calculates the equivalent moment in all selected target timezones — including accurate daylight saving time transitions with no manual adjustment needed.
Privacy First
Everything runs entirely in your browser. No data is sent to any server. No signup required, no tracking, no ads. Your timezone preferences exist only for the duration of your current browser session.
Daylight Saving Time
DST changes are handled automatically. Because the tool uses named timezone identifiers (e.g. America/New_York) rather than fixed UTC offsets, the correct offset is always applied based on the exact date you select.
Meeting Planner
Each timezone card shows a colour-coded meeting quality indicator: green for standard business hours (9 AM – 6 PM), yellow for early/late working hours, and red for sleeping hours — helping you find the optimal time slot for all participants in one glance.
How to use
Set the source time
Pick the date and time you want to convert, and the time zone it belongs to.
Add target zones
Choose the zones you want to compare. Several can be shown side by side, which is what makes scheduling across regions practical.
Read the converted times
Each zone shows the equivalent local time and date. Daylight saving is applied automatically using your browser's time zone database.
Check the date change
Watch for zones where the converted time falls on a different calendar day — the most common mistake when scheduling across the Pacific.
At a glance
- Data source
- Your browser's own IANA time zone database
- Daylight saving
- Applied automatically, including across transition dates
- Comparison
- Several zones side by side
- Most common mistake
- Missing that the converted time falls on a different calendar day — the tool shows the date alongside the time for exactly this reason
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Frequently asked questions
Quick answers about this free online tool.
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