Time Zone Converter

Convert time between 30+ world time zones. DST-aware. See live current times side by side.

Last reviewed: April 2026

Reviewed by Shannon Patterson, software engineer · last updated April 2026

New to this tool? Click here for instructions

From Time Zone

→

Multiple targets below

Date & Time

Converted Times

Select a source time zone and enter a date/time to convert.

Live World Clock

Updates every second. Add up to 8 clocks.

How to Use the Time Zone Converter

To use the Time Zone Converter, follow these steps:

1. Select your source time zone from the 'From Time Zone' dropdown.

2. Enter a date and time using the datetime picker, or click 'Set to Now' to use the current moment.

3. View converted times in the results panel - showing multiple major time zones at once.

4. Use the world clock below to see live current times in up to 8 cities simultaneously.

5. Copy results to paste a formatted time comparison into emails, Slack, or documents.

When to Use the Tool in Real Workflows

The Time Zone Converter is ideal for anyone who needs to schedule meetings across different time zones, travel frequently, or work with international clients. It's also useful for anyone who needs to understand the current time in multiple locations for business or personal purposes.

How It Works

The Time Zone Converter uses the browser's Intl API with the IANA time zone database to ensure accurate and up-to-date time zone conversions. This means it automatically accounts for Daylight Saving Time (DST) and other time zone rules. When scheduling meetings, it's crucial to use UTC as the reference to avoid DST confusion. The tool also provides a live world clock that updates every second, allowing you to see the current time in up to 8 cities simultaneously.

Tips, Edge Cases, or Limitations

1. Always confirm whether the other party's country is currently in DST when scheduling meetings across time zones.

2. Use IANA zone names (like 'America/New_York') rather than abbreviations like 'EST' to avoid ambiguity.

3. Some time zones have 30-minute or even 45-minute offsets from UTC, so be aware of these when scheduling.

4. Not all countries observe the same week boundaries, so be mindful of this when scheduling meetings in different regions.

5. The tool assumes that the browser's Intl API is available and up-to-date. If the browser does not support this API, the tool may not function correctly.

Frequently Asked Questions

Select a source time zone, enter a date and time, and view the converted times in the results panel. You can also add clocks to the world clock section to see live current times side by side for up to 8 cities.

Yes. The converter uses the browser's Intl API with the IANA time zone database, which tracks all DST rules automatically.

UTC (Coordinated Universal Time) is the successor to GMT (Greenwich Mean Time) and the international standard for civil time. All time zones are defined as offsets from UTC. UTC and GMT are generally interchangeable for practical purposes.

The tool supports 30+ world time zones, allowing you to see current times in multiple cities simultaneously.

EST (Eastern Standard Time) is UTC-5, while EDT (Eastern Daylight Time) is UTC-4. EDT is observed during Daylight Saving Time in the United States and Canada.

Quick reference

Time Zone Converter — quick reference
Aspect	Detail
Purpose	Time Zone Converter is a free browser tool for fast, repeatable tasks.
Runs in	Any modern browser — no install, no signup.
Privacy	Data is processed locally in your browser; no upload to any server.
Best for	Quick lookups, daily reference, learning, prototyping.

Example walk-through

Worked example: step-by-step

Step 1. Open the Time Zone Converter webpage and locate the input field for the date/time format (e.g., "2023-10-05 15:30").

Step 2. Select the source time zone from the dropdown menu (e.g., "America/New_York" for Eastern Time).

Step 3. Choose the target time zone from another dropdown menu (e.g., "Europe/London" for Greenwich Mean Time).

Step 4. Click the "Convert" button to trigger the timezone calculation using the moment-timezone library.

Step 5. The webpage displays the converted time in the target timezone (e.g., "2023-10-05 20:30" for London).

Sample input: 
Date/Time: 2023-10-05 15:30
Source Zone: America/New_York
Target Zone: Europe/London

Expected output: 
Converted Time: 2023-10-05 20:30 (Europe/London)
Time Difference: +5 hours