Time Zone Converter
Convert times between 15+ world time zones. See all zones at a glance.
Last updated: April 2026 · Source: GOV.UK — When do the clocks change
London (GMT/BST)
14:00
Paris / Berlin (CET)
15:00
Athens / Helsinki (EET)
16:00
Moscow (MSK)
17:00
Dubai (GST)
18:00
Mumbai (IST)
19:30
Bangkok (ICT)
21:00
Beijing / HK (CST)
22:00
Tokyo (JST)
23:00
Sydney (AEST)
00:00
+1 day
Auckland (NZST)
02:00
+1 day
New York (ET)
09:00
Chicago (CT)
08:00
Denver (MT)
07:00
Los Angeles (PT)
06:00
Disclaimer
This calculator is provided for informational purposes only and should not be considered as financial or tax advice. All calculations are performed locally in your browser — no personal data is collected or sent to our servers. Rates and thresholds are sourced from HMRC and GOV.UK and are updated for the current tax year. Always verify results with HMRC or consult a qualified professional before making financial decisions.
How It Works
The UK uses Greenwich Mean Time (GMT, UTC+0) in winter and British Summer Time (BST, UTC+1) from the last Sunday in March to the last Sunday in October. This calculator automatically accounts for the current DST status when converting between UK time and other zones.
Many countries change their clocks on different dates or do not observe daylight saving at all. The calculator uses the IANA time zone database to handle these differences accurately. It shows you the current time in both locations and highlights any date-line crossings.
For business scheduling, the tool can show overlapping working hours between two time zones — useful for arranging calls with colleagues or clients in different regions without anyone having to work unsociable hours.
Example: UK to New York
- UK time: 14:00 BST (summer)
- New York (EDT, UTC−4): 09:00
- Time difference: 5 hours behind
- Overlapping 9-to-5 hours: 14:00–17:00 UK / 09:00–12:00 NY
Frequently Asked Questions
- What does the Time Zone Converter do?
- Convert times between 15+ world time zones. See all zones at a glance. All calculations are performed in your browser using official UK rates and thresholds.
- Is this calculator free to use?
- Yes. All calculators on Calks.uk are completely free to use. No account or registration is required. All calculations run in your browser — no data is collected.
- Can I use this on my phone?
- Yes. All our calculators are fully responsive and work on smartphones, tablets and desktop computers. The interface adapts to your screen size automatically.