UTC (Coordinated Universal Time) is the primary time standard. All time zones are defined as UTC plus or minus an offset.

Can I convert to multiple time zones at once?

Yes, you can add up to 6 destination time zones and convert to all simultaneously.

Time Zone Converter – Convert Time Between World Time Zones

Q: What is Daylight Saving Time?

DST advances clocks by 1 hour in summer. The US, UK, and most of Europe observe DST. Our converter accounts for it automatically.

Q: Is this Time Zone Converter free?

Yes, completely free with no signup required.

Time Zone Converter

Convert time between 45+ world time zones instantly. See live clocks and plan meetings across time zones.

🇵🇰

Karachi

02:57:18 PM

UTC+5

🇺🇸

New York

05:57:18 AM

UTC−5

🇬🇧

London

10:57:18 AM

UTC+0/+1

🇦🇪

Dubai

01:57:18 PM

UTC+4

🇯🇵

Tokyo

06:57:18 PM

UTC+9

🇮🇳

Mumbai

03:27:18 PM

UTC+5:30

🇺🇸

Los Angeles

02:57:18 AM

UTC−8

🇦🇺

Sydney

08:57:18 PM

UTC+10

Convert Time

From Time Zone

DateTime

Convert To

Results

Select time zones and click Convert Time.

🔴 Live — Selected Zones

🇵🇰KarachiUTC+5

02:57:18 PM

🇺🇸New YorkUTC−5

05:57:18 AM

🇬🇧LondonUTC+0/+1

10:57:18 AM

🇯🇵TokyoUTC+9

06:57:18 PM

World Time Zone Converter

Our Free Time Zone Converter supports 45+ time zones across every continent. Convert any date and time from one zone to multiple zones simultaneously — perfect for scheduling international meetings, coordinating with remote teams, or planning travel across countries.

Live clocks update every second so you always see the current local time in major cities. Convert past, present, or future times by selecting any date and time in the source zone and getting the equivalent in up to 6 destination zones at once.

🌍

45+ Time Zones

Covers all major cities — New York, London, Dubai, Karachi, Tokyo, Sydney and more. Every continent represented.

🔴

Live Clocks

Real-time clocks update every second for 8 major cities. Always know the current time anywhere in the world.

📅

Multi-Zone

Convert to up to 6 time zones at once. Perfect for scheduling meetings across multiple international offices.

How Time Zones Work

Understanding UTC offsets and DST

Time Zone Formula

Local Time = UTC + UTC Offset
UTC = Local Time − UTC Offset

Karachi = UTC+5New York = UTC−5 (EST)London = UTC+0 (GMT)Tokyo = UTC+9

UTC vs GMT — What is the Difference?

GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) are almost identical for everyday use. UTC is the modern scientific standard based on atomic clocks, while GMT is the historical time standard based on the Royal Observatory in Greenwich, England.

Daylight Saving Time (DST)

Many countries shift their clocks forward by 1 hour in summer. For example, New York uses EST (UTC−5) in winter and EDT (UTC−4) in summer. Our converter handles DST automatically.

Half-Hour & 45-Min Offsets

Some zones have non-standard offsets — India is UTC+5:30, Nepal is UTC+5:45, Iran is UTC+3:30, and Afghanistan is UTC+4:30. All are supported.

Major Time Zones Reference

City	Time Zone	UTC Offset
🇺🇸 New York	EST/EDT	UTC−5/−4
🇬🇧 London	GMT/BST	UTC+0/+1
🇦🇪 Dubai	GST	UTC+4
🇵🇰 Karachi	PKT	UTC+5
🇮🇳 Mumbai	IST	UTC+5:30
🇨🇳 Shanghai	CST	UTC+8
🇯🇵 Tokyo	JST	UTC+9
🇦🇺 Sydney	AEST	UTC+10
🇸🇦 Riyadh	AST	UTC+3
🇷🇺 Moscow	MSK	UTC+3

Who Uses This Converter?

💼 Remote Workers

Schedule meetings with colleagues across different countries without confusion. Check if a 9 AM call in New York falls at a reasonable time in Karachi, London, or Tokyo.

✈️ Travelers

Calculate arrival times in your destination city, understand jet lag impact, and plan your schedule in the local time zone before you land.

📺 Sports & Events

Find out when a live sports event, concert, or product launch happening in another country will air in your local time zone.

🏢 Global Businesses

Coordinate customer support shifts, trading hours, and international conference calls across offices in multiple countries simultaneously.

👨‍💻 Developers

Convert timestamps between time zones for debugging logs, scheduling cron jobs, or coordinating deployment windows across global server infrastructure.

👨‍👩‍👧 Families Abroad

Know the best time to call family members living in different countries without waking them up at 3 AM.

Time Zone Converter FAQ

What is UTC?

UTC (Coordinated Universal Time) is the primary time standard used worldwide. All time zones are defined as UTC plus or minus an offset. For example, Pakistan Standard Time is UTC+5.

What is Daylight Saving Time?

DST is the practice of advancing clocks by 1 hour during summer months. Countries like the US, UK, and most of Europe observe DST. Pakistan, India, China and Japan do not. Our converter accounts for DST automatically.

How do I convert Pakistan time to UK time?

Select Karachi (PKT, UTC+5) as your source zone and London (GMT/BST) as the destination. Pakistan is 5 hours ahead of London in winter and 4 hours ahead in summer when the UK observes BST.

Can I convert to multiple zones at once?

Yes. You can add up to 6 destination time zones and convert to all of them simultaneously with a single click.

Does it support half-hour offsets?

Yes. India (UTC+5:30), Nepal (UTC+5:45), Iran (UTC+3:30), and Afghanistan (UTC+4:30) are all included with their exact non-standard offsets.

Is this Time Zone Converter free?

Yes, completely free with no signup or registration required.