Need to know what time it is somewhere else? Just pick two cities, enter the time, and our free time zone calculator does the rest. It handles Daylight Saving Time, weird offsets, and everything in between. No math, no stress, just the right time every time.
Modify the values and click the calculate button to use
Think of the Earth as a big orange. The sun can only shine on one side at a time. So when it's daytime in New York, it's nighttime in Tokyo.
To make things consistent, we split the Earth into 24 slices (like an orange). Each slice is a time zone. They're roughly 15 degrees of longitude wide. That's because the Earth rotates 15 degrees every hour.
So when you move from one slice to the next, the time changes by one hour. Simple, right?
Well, not exactly. Countries and regions get to decide their own time zones. So some places are half an hour off (like India). Some are 45 minutes off (like Nepal). And some, like China, use one time zone for the whole country even though it's huge. That's why you need a calculator. Your brain can handle the basic math. But the weird exceptions? Let the tool do that.
Using it is stupidly easy. Here's how:
Pick your starting location
Type in a city or choose a time zone from the list.
Pick your target location
Where do you want to know the time?
Enter the time
Type in the time you're starting with.
Hit convert
That's it. The calculator shows you the exact time in the other place.
Let's try an example. Say you're in New York and it's 3 PM. You need to call someone in Berlin. You put in New York, 3 PM, and Berlin. The calculator tells you it's 9 PM in Berlin. That's a 6-hour difference.
But wait - does Daylight Saving Time matter? Yes! And our calculator handles that automatically. More on that in a sec.
Here's the biggest problem people have. They think time zones are fixed. They're not. They change twice a year for many places because of Daylight Saving Time.
So the time difference between New York and London is 5 hours in the winter. But in the summer, it's 4 hours. Why? Because the US and UK switch to DST on different dates.
This is where most online calculators mess up. They use a fixed offset. Our calculator checks the current DST status for both locations. So you always get the right time.
I've seen people miss flights, show up late to meetings, and even wake up at 3 AM for a call because they got the time zone wrong. Here are the most common mistakes:
Forgetting DST - Just because it's summer where you are doesn't mean it's summer everywhere.
Mixing up AM and PM - A 12-hour difference is easy to flip. Double check.
Assuming all time zones are whole hours - India, Nepal, Iran, and parts of Australia are half-hour or 45-minute offsets.
Using the wrong city - "London" could mean London, UK or London, Ontario. They're in different time zones.
This isn't just for travelers. Here are three ways people use it every day:
You work for a company with teams in three countries. You need to schedule a meeting that works for everyone. Instead of guessing, you use the calculator to find a time that's reasonable for all locations. Pro tip: Look for a time that's during business hours for everyone. That usually means 9 AM to 5 PM in each time zone. If that's impossible, rotate who has to wake up early.
Your cousin moved to Australia. You want to call them on their birthday. But you don't want to wake them up at 2 AM. Use the calculator to find a good time for both of you.
Your flight departs at 10 PM local time. But the arrival time is shown in the destination's local time. The calculator helps you figure out how long the flight actually is.
You've probably seen these terms. They're often used interchangeably. But there's a tiny difference.
GMT (Greenwich Mean Time)
A time zone based on the sun's position at the Royal Observatory in Greenwich, London.
UTC (Coordinated Universal Time)
A time standard based on atomic clocks. Way more precise than GMT.
For everyday use, they're the same thing. No one will notice the 0.9-second difference. But scientists and GPS systems use UTC because it's exact.
So when you see "UTC+5" or "GMT-3", they mean the same thing. It's just the offset from the prime meridian.
You won't always have a calculator handy. Here's a simple trick:
First, know the UTC offset for both places. For example, New York is UTC-5 in winter. London is UTC+0. The difference is 5 hours. So when it's noon in New York, it's 5 PM in London.
But here's the catch. You need to know if DST is active. In summer, New York is UTC-4. London is UTC+1. The difference is still 5 hours? No, wait. Let me redo that.
Actually, the math is easier if you just use the calculator. Seriously. Don't try to do DST in your head. It's a recipe for mistakes.
Some places have time zones that aren't whole hours. Here are the most common ones:
India - UTC+5:30 (30 minutes off)
Nepal - UTC+5:45 (45 minutes off - the weirdest one)
Iran - UTC+3:30 (30 minutes off)
Afghanistan - UTC+4:30 (30 minutes off)
Newfoundland, Canada - UTC-3:30 (30 minutes off)
Parts of Australia - Some areas use UTC+9:30 and UTC+10:30
Our calculator handles all of these. So you don't have to worry about the weird math.
DST is when clocks move forward one hour in spring and back one hour in fall. The idea is to make better use of daylight. But honestly, it just makes time zones more confusing.
Not every country uses DST. Japan, China, and most of Africa don't. The US and Europe do, but they switch on different dates.
So in March, the US switches to DST before Europe. For a few weeks, the time difference between New York and London is 4 hours instead of 5. Then Europe switches, and it goes back to 5 hours.
Our calculator checks the current DST status for both locations. So you always get the right time, no matter what.
Here are some things that might surprise you:
China has only one time zone - Even though it's as wide as the US, the whole country uses Beijing time. So in western China, the sun rises at 10 AM.
France has the most time zones - Because of its overseas territories, France spans 12 time zones. That's more than any other country.
There's a time zone that's 26 hours ahead - How? The International Date Line creates a 26-hour difference between the Line Islands (UTC+14) and American Samoa (UTC-11).
Time zones were invented by railroads - Before the 1800s, every town used its own local time. Trains made that impossible, so time zones were created.
Most people use these calculators on their phones. Here are some tips:
Use the search feature - Instead of scrolling through a long list, just type the city name.
Bookmark the page - If you travel a lot, save it to your home screen.
Check your phone's time zone settings - Make sure your phone is set to the right time zone. Otherwise, the calculator might give you wrong results.
No tool is perfect. Here are situations where you should double-check:
During DST transition days - The hour that "springs forward" or "falls back" can be confusing. Some calculators handle it wrong.
For historical times - Time zones have changed over the years. A calculator might use current rules for past dates.
For very remote locations - Some small islands use unofficial time zones. The calculator might not have them.
If you're planning something important (like a flight), always confirm with the airline or a second source.
There are a lot of time zone calculators out there. Here's why ours is better:
It's free
No sign-ups, no ads, no nonsense.
It handles DST correctly
We check current DST status for both locations.
It works for any city
Type in any major city, and we'll find its time zone.
It's fast
Results appear instantly.
It's mobile-friendly
Works great on phones and tablets.
So next time you need to figure out a time zone, skip the mental math. Use our calculator. It'll save you time, stress, and maybe even a missed meeting.
It's simple. Pick your starting location, pick your target location, enter the time, and hit convert. The calculator shows you the exact time in the other place. No math required.
Your devices might be set to different time zones. Check your settings. On your phone, go to Settings > Date & Time. On your computer, check the time zone in the clock settings. Make sure "Set automatically" is on.
For everyday use, they're the same. GMT is a time zone based on the sun. UTC is a time standard based on atomic clocks. The difference is less than a second. So don't worry about it.
Know the UTC offset for both places. Subtract the smaller offset from the larger one. That's the time difference. But be careful with DST. It changes the offsets twice a year.
India chose UTC+5:30 because the sun rises and sets at times that make sense for the whole country. It's a compromise between the eastern and western parts of India.
DST is when clocks move forward one hour in spring and back one hour in fall. It changes the time offset for that location. So the time difference between two places can change depending on the season.