Time Zone Converter: Convert Time Between Cities, EST, PST, UTC and GMT
This free time zone converter shows what time it is in any city when it is a given time in another. Pick a date and time, add the cities you care about, and see every local time side by side, with working hours highlighted so you can find a slot that suits everyone. It follows daylight saving rules automatically and runs in your browser.
Pick your starting time and add cities in the converter above. Every local time updates at once.
Use the toolEvery city side by side
Local time, date and UTC offset in one grid.
Daylight saving built in
Rules for the exact date you pick, not a fixed offset.
Working hours highlight
Green rows show who is inside their working day.
Private by design
Nothing is uploaded. Share links hold the settings.
Set a date and time in your starting city, add the other cities, and every local time appears side by side with the date. Daylight saving is applied for the date you choose.
Key Takeaways
- Enter a time and a city, add the other cities, and every local time appears side by side, including the date.
- Daylight saving time is applied for the exact date you choose, so a conversion in March or November is not wrong by an hour.
- Use city names, not abbreviations, when you can. CST can mean more than one zone, but a city is unambiguous.
- Some zones are not whole hours from UTC: India is UTC+05:30 and Nepal is UTC+05:45.
- The slider and the working hours highlight help you find a meeting time that falls inside everyone's day.
Convert Time Between Time Zones in Seconds
Time zone maths is easy to get wrong. People forget daylight saving, mix up EST and EDT, or lose a day when the conversion crosses midnight. The converter does the sums for the date you pick, so what you see is the actual clock time in each place.
Your cities and times are processed on your device. Nothing is uploaded, and no account is needed.
How to Use the Time Zone Converter
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1STEP 1 Choose your starting city or time zone, then set the date and time. It starts at the current time.
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2STEP 2 Add the other cities you want to compare. You can search by city, country or zone name.
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3STEP 3 Read the grid. Each row shows the local time, the date and the offset from UTC.
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4STEP 4 Drag the slider to try different times. Rows turn green during working hours and grey at night.
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5STEP 5 Select Copy summary to paste the times into an invite, or Copy share link to send the same view to someone else.
EST to PST Converter and Other Common US Conversions
The most searched conversions are between US zones. Eastern Time is three hours ahead of Pacific Time, Central Time is one hour behind Eastern, and Mountain Time is one hour ahead of Pacific. The gaps stay the same in summer and winter because every zone moves together.
| Convert | Difference | Example |
|---|---|---|
| EST to PST | Pacific is 3 hours behind | 12:00 noon EST is 9:00 AM PST |
| PST to EST | Eastern is 3 hours ahead | 9:00 AM PST is 12:00 noon EST |
| CST to EST | Eastern is 1 hour ahead | 3:00 PM CST is 4:00 PM EST |
| EST to CST | Central is 1 hour behind | 4:00 PM EST is 3:00 PM CST |
| MST to PST | Pacific is 1 hour behind | 10:00 AM MST is 9:00 AM PST |
| EST to MST | Mountain is 2 hours behind | 12:00 noon EST is 10:00 AM MST |
What Time Is It in EST When It Is 3 PM in CST?
It is 4 PM. Eastern is one hour ahead of Central, so add one hour going from CST to EST. The same rule works with daylight time: 3 PM CDT is 4 PM EDT.
ET Time to GMT and EST to UTC: Convert to World Time
To convert Eastern Time to GMT or UTC, add the Eastern offset. In winter, Eastern Standard Time is UTC-05:00, so 9:00 AM EST is 14:00 UTC. In summer, Eastern Daylight Time is UTC-04:00, so 9:00 AM EDT is 13:00 UTC.
| Zone | Offset from UTC | Used in |
|---|---|---|
| EST (Eastern Standard) | UTC-05:00 | Winter |
| EDT (Eastern Daylight) | UTC-04:00 | Summer |
| CST (Central Standard) | UTC-06:00 | Winter |
| CDT (Central Daylight) | UTC-05:00 | Summer |
| MST (Mountain Standard) | UTC-07:00 | Winter |
| MDT (Mountain Daylight) | UTC-06:00 | Summer |
| PST (Pacific Standard) | UTC-08:00 | Winter |
| PDT (Pacific Daylight) | UTC-07:00 | Summer |
"ET" means whichever of the two Eastern times is in force on that date, which is why a converter that takes a date is safer than a fixed rule.
UTC vs GMT: What Is the Difference?
Any good time zone converter treats UTC as its reference point. For everyday scheduling, UTC and GMT show the same clock time. GMT began as the mean solar time at the Royal Observatory in Greenwich. Coordinated Universal Time, UTC, is the modern standard that every time zone is defined against, as an offset such as UTC+05:30.
The United Kingdom uses GMT in winter and British Summer Time, which is UTC+01:00, in summer. So "London time" is not always GMT, and a conversion to GMT in July can be an hour different from a conversion to London time.
Convert UTC to Local Time
To convert UTC to local time, add the local offset. If it is 14:00 UTC, then it is 09:00 in New York in winter, 19:30 in India and 23:00 in Tokyo. For a time in a place west of UTC, subtract the offset instead. The converter does this for you, including the date change when the result crosses midnight.
- Enter the time and choose UTC as the starting zone.
- Add your own city and any others.
- Read each row. A date shown next to the time warns you when the day is different.
Time Zone Calculator: Worked Example for a Global Meeting
A time zone converter is most useful when several cities are involved, so here is a full example.
Say a team in New York needs to meet colleagues in London, India and Tokyo, and the New York time is 9:00 AM. The result depends on whether daylight saving time is in force.
| City | Winter (US on EST, UK on GMT) | Summer (US on EDT, UK on BST) |
|---|---|---|
| New York | 9:00 AM | 9:00 AM |
| London | 2:00 PM | 2:00 PM |
| India (UTC+05:30) | 7:30 PM | 6:30 PM |
| Tokyo (UTC+09:00) | 11:00 PM | 10:00 PM |
India and Japan do not change their clocks, so the gap to New York grows by an hour in winter. A 9:00 AM New York call lands in the evening in India and the late evening in Tokyo, which shows why the working hours highlight matters.
The United States and the United Kingdom change their clocks on different dates, so for a few weeks each year the gap between New York and London is four hours and not five. Use the date picker for any meeting booked near a clock change.
Why Daylight Saving Time Causes Mistakes
Daylight saving time moves clocks forward in spring and back in autumn, usually by one hour. Lord Howe Island in Australia is a rare exception that shifts by 30 minutes. Not every place uses it, and the dates differ by country, which is where most conversion mistakes come from.
- Different change dates. The United States and Europe do not switch on the same weekend.
- Opposite seasons. Countries south of the equator are on summer time while the north is on winter time.
- No change at all. India and Japan keep one offset all year.
- Old rules. Some places have changed their rules over the years, so a date in the past can use a different offset.
The converter uses the IANA time zone database that your browser carries, through Intl.DateTimeFormat. It records each zone's rules and history and applies them to the date you pick. For background, see Wikipedia's time zone article.
If you pick a time that does not exist because the clocks jump forward, or one that happens twice because they go back, the converter shows a note and tells you which time it used.
Time Zones With Odd Offsets
Most zones differ from UTC by a whole number of hours, but not all of them. India is UTC+05:30, Iran is UTC+03:30 and Afghanistan is UTC+04:30. Nepal is UTC+05:45, a 45-minute offset adopted in 1986. Offsets run from UTC-12:00 to UTC+14:00.
This is why an "hours difference" rule of thumb fails for these places. Between New York and India, the gap is 10.5 hours in winter and 9.5 hours in summer.
Find the Best Meeting Time With the Time Zone Converter
A good meeting time keeps everyone inside reasonable hours. The slider shows you where each person's working day starts and ends, and the green bands show the overlap.
- 1Add every attendee's city to the grid.
- 2Set working hours, for example 9:00 to 17:00, or tighter hours if your team prefers them.
- 3Drag the slider until the most rows are green.
- 4If no time works for everyone, pick the option that shares the pain, and rotate it from week to week.
- 5Copy the summary into the invite, and include the zone name or city next to each time.
Write times with a city or an offset, such as "9:00 AM New York (UTC-04:00)", and not with a bare "EST", so nobody has to guess.
Convert Time Zones in Excel, Google Sheets and Code
| Where | Method |
|---|---|
| Excel | =A2+(5.5-(-5))/24 converts a time in A2 from UTC-05:00 to UTC+05:30 by adding the offset difference in hours divided by 24. It does not handle daylight saving by itself. |
| Google Sheets | The same offset formula works. Add the difference in hours divided by 24, and adjust manually for daylight saving. |
| JavaScript | new Intl.DateTimeFormat("en-US", {timeZone: "Asia/Kolkata", dateStyle: "medium", timeStyle: "short"}).format(date) shows a date in a named zone with daylight saving applied. |
Spreadsheet formulas that add a fixed offset ignore daylight saving. For a quick, correct answer on a particular date, use the converter above.
Privacy: Your Times and Cities Stay in Your Browser
The conversion runs on your device. The cities and times you choose are not uploaded or stored. Share links carry the settings in the link itself, so only people you send the link to can see them.
FAQs
How do I convert time between time zones?
Pick the starting city and set the date and time, then add the cities you want to compare. Each row shows the local time and date, with the offset from UTC. Because the converter uses the date you choose, daylight saving time is applied correctly, including when the result falls on a different day.
What is the time difference between EST and PST?
Pacific Time is three hours behind Eastern Time. So 12:00 noon EST is 9:00 AM PST, and 9:00 AM PST is 12:00 noon EST. The gap stays the same in summer, because EDT and PDT are both one hour ahead of their winter times.
What time is 3 PM CST in EST?
It is 4 PM EST. Eastern Time is one hour ahead of Central Time, so you add one hour when you convert from CST to EST. The same rule applies in summer: 3 PM CDT is 4 PM EDT.
How do I convert ET time to GMT?
Add the Eastern offset. In winter, Eastern Standard Time is UTC-05:00, so you add five hours: 9:00 AM EST is 14:00 GMT. In summer, Eastern Daylight Time is UTC-04:00, so you add four hours. The date you convert on decides which applies.
What is the difference between UTC and GMT?
They show the same clock time for everyday use. GMT is the mean solar time at Greenwich, and UTC is the modern standard that all zones are measured against. The UK uses GMT in winter and BST in summer, so London time is not always GMT.
How does daylight saving time affect conversions?
It changes a zone's offset by one hour in most places, on dates that differ from country to country. A conversion that is right in January can be an hour out in July. The converter applies the rules for the date you choose, so you get the real local time.
Why is India 5 hours 30 minutes ahead and not a whole number?
India uses a single national time of UTC+05:30. A few places use offsets that are not whole hours: Iran is UTC+03:30, Afghanistan is UTC+04:30 and Nepal is UTC+05:45. Simple whole-hour rules do not work for them, but the converter handles them correctly.
Does the time zone converter save or upload my data?
No. The conversion runs entirely in your browser, and the cities and times you choose are not stored or sent to a server. If you copy a share link, the settings are inside the link, so only people you send it to can open that view.
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