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Timezone Converter

Convert times between any two time zones worldwide. Find the equivalent local time for meetings, calls or travel across different countries and time zones.

Last reviewed 15 August 2026Reviewed after a methodology change

Your details

Calculator inputs
e.g. 0 for GMT
e.g. -5 for EST

When to use this calculator

  • When you need a fast estimate before making a bigger decision.
  • When you want to compare a few scenarios using the same assumptions.
  • When you need a clearer starting point before using a detailed quote or formal document.
  • When you want to sanity-check a figure you have seen elsewhere.

A realistic planning example

Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.

A realistic planning example
InputValue
Hour (0—23)40 hours
Your UTC Offset (e.g. 0 for GMT)0
Target UTC Offset (e.g. -5 for EST)-5

After entering these figures, focus on {hour} first and then rerun the tool with a more cautious assumption.

How to read your results

{hour}

The figure produced by this output for the inputs you entered. Change one variable at a time if you want to see what drives it.

Method & assumptionsAuthoritative sources

This converter allows you to translate a specific date and time from one time zone to another, accounting for current UTC offsets and, where applicable, daylight saving time rules. Time zone data is based on the IANA Time Zone Database, which is the global standard used by operating systems and programming languages. The tool applies the rules that are in force on the date you select, so it will correctly handle periods before or after a daylight saving transition. It does not account for historical time zone changes that predate the IANA database's coverage, which may matter for research into dates before the mid-twentieth century. For forward scheduling across months, verify that the daylight saving status shown reflects the transition dates for the relevant year.

Common mistakes

  • !Using an assumption that is not supported by a current local quote, bill, statement or official source.
  • !Treating a generic estimate as a lender, provider, payroll or tax authority decision.
  • !Mixing monthly and annual inputs without converting them consistently.
  • !Testing only one scenario instead of checking how a cautious assumption changes the result.

What to do next

  • Run a second scenario with a cautious assumption so you can see the downside clearly.
  • Compare the result with the related calculators below before making a decision.
  • Check current local rules, eligibility and provider terms before applying or committing money.
  • Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.

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Frequently asked

The UK uses Greenwich Mean Time (GMT / UTC+0) in winter and British Summer Time (BST / UTC+1) from the last Sunday of March to the last Sunday of October. Despite a 2019 EU vote to end seasonal clock changes, the UK continues both GMT and BST under the Summer Time Order 2002.

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