Timezone Converter — Free Online Tool

What Is Timezone Converter?

A free online timezone converter. Convert any date and time between 15+ world timezones. Includes a live reference table showing current time in major cities worldwide.

Coordinating across timezones is one of the biggest challenges for remote teams, international travel, and global events. Timezone Converter handles conversions between 15+ world timezones with DST (Daylight Saving Time) awareness, making it easy to find a meeting time that works for participants in different parts of the world.

The converter uses a straightforward interface: select the source timezone, enter the date and time, then select the target timezone. The converted time is displayed side by side with the source, so you can see both times at once. The reference table below shows the current time in major cities worldwide, updated in real time. This is useful for a quick glance at what time it is in London, Tokyo, or New York right now.

The tool uses the browser's Intl.DateTimeFormat API for timezone conversion, which respects all current DST rules and timezone definitions. DST transitions are handled automatically — if you convert a date that falls during a DST changeover, the result accounts for the offset shift. This is critical for scheduling business meetings during spring-forward and fall-back periods.

Common timezone abbreviations are used throughout for clarity: UTC (Coordinated Universal Time), EST/EDT (US Eastern), PST/PDT (US Pacific), GMT (UK/Europe), CET/CEST (Central Europe), IST (India), JST (Japan), AEST/AEDT (Australia East), and more. The full timezone names are also shown for unambiguous identification.

Real-World Use Cases for Timezone Converter

Scheduling a Meeting Across Three Timezones

You are in New York (EST), your colleague is in London (GMT), and a client is in Singapore (SGT). You propose 10 AM EST for a call. Enter EST as source, 10 AM, then check GMT (3 PM) and SGT (11 PM). The Singapore time is late evening, so you may need to adjust to 9 AM EST (2 PM London, 10 PM Singapore) or find a different slot.

Planning a Flight Arrival with Timezone Difference

You are flying from San Francisco to Tokyo. Departure is 11 AM PST on Monday. The flight duration is 11 hours. Add 11 hours to 11 AM PST = 10 PM PST, then convert to JST (+17 hours from PST): 3 PM Tuesday JST. The timezone converter handles the +17 hour offset and the date change.

Checking DST Impact on a Recurring Meeting Time

A weekly team meeting is scheduled at 2 PM EST. When the US switches to EDT (spring forward) but Europe has not yet switched to CEST, the time difference changes by one hour. Use the converter with specific dates around the DST transition to verify the correct time in each participant's timezone.

Why Use Timezone Converter?

15+ world timezones supported
Live current time in major cities
DST-aware using Intl.DateTimeFormat
Side-by-side source and target display

How to Use Timezone Converter — Step by Step

Select the source timezone.

Enter the date and time.

Select the target timezone.

View the converted time and reference table.

Who Is Timezone Converter Best For?

international meetings
travel planning
remote teams
event scheduling

Pro Tips for Timezone Converter

1When scheduling recurring meetings across DST transitions, specify the time in UTC to avoid confusion. UTC does not observe DST, so the time remains consistent year-round.
2The live reference table is useful for a quick "what time is it in X right now" check. It updates automatically as timezones enter and exit DST.
3Be aware of half-hour timezone offsets. India (UTC+5:30), Nepal (UTC+5:45), and parts of Australia have 30 or 45 minute offsets, not full hours.
4For international event invitations, always include the time in the recipient's local timezone plus UTC. This eliminates ambiguity and reduces scheduling errors.

Timezone Converter — Frequently Asked Questions

What is UTC?

UTC (Coordinated Universal Time) is the primary time standard. All timezones are defined as offsets from UTC, e.g., EST is UTC-5, JST is UTC+9.

Does this handle daylight saving time?

Yes, the converter uses the browser's Intl.DateTimeFormat API, which automatically accounts for daylight saving time (DST) transitions in each timezone.

How accurate are the unit conversions?

Conversions use NIST-standard conversion factors with precision up to 15 significant digits. Currency exchange rates update every 10 minutes from a free data source.

Can I convert between any two units?

Yes. Each converter supports all standard units within its category. For example, the length converter handles metric, imperial, and nautical units.

Is Timezone Converter really free to use?

Yes, Timezone Converter is completely free with no hidden charges, no usage limits, and no premium tiers. You can use it as often as you need without signing up or providing any personal information.

Ready to Use Timezone Converter?

Free online tool — works in your browser, no sign-up required. Start using it right now.

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