Timezone Calculator

The Timezone Calculator set makes it simple to convert clock times across the world's major zones. Dedicated tools like the UTC to EST Converter, UTC to PST Converter, and UTC to IST Converter handle daylight-saving offsets automatically, while the general Time Zone Converter lets you compare any two zones side by side.

Browse the Popular list to find the most-used converters instantly, or switch to the Trending tab to see what's catching on. Every tool is free, requires no sign-up, and works on any phone, tablet, or computer.

  • Flight Arrival Local Time Calculator
    Calculate your flight's local arrival time across time zones. Enter departure time, flight duration, and origin/destination UTC offsets to get arrival time.
  • Hours Until a Given Time Calculator
    Find how many hours and minutes remain until a given time of day. Enter the current time and target time to get the countdown on a 24-hour cycle.
  • CST to UTC Converter
    Convert Central Standard Time (CST, UTC−6) to Coordinated Universal Time (UTC). Enter any CST hour and minute to get the exact UTC time instantly.
  • UTC to SGT Converter
    Convert UTC time to Singapore Standard Time (SGT) instantly. SGT is UTC+8 year-round, with no daylight saving. Enter the UTC hour and minute.
  • CST to EST Time Converter
    Convert CST (Central Standard Time) to EST (Eastern Standard Time) instantly. EST is 1 hour ahead of CST. Enter a time and get the result.
  • CST to IST Time Converter
    Convert Central Standard Time (CST/CDT) to India Standard Time (IST). CST is +11:30 ahead of IST, CDT is +10:30. Get instant accurate results.
  • Minutes to Hours and Minutes Converter
    Convert total minutes into hours and minutes instantly. Enter any number of minutes to see the equivalent hours, remaining minutes, and decimal hours.
  • EST to CET Time Converter
    Convert Eastern Standard Time (EST, UTC−5) to Central European Time (CET, UTC+1). CET is 6 hours ahead of EST. Enter a time to see the instant result.
  • MST to EST Time Converter
    Convert Mountain Standard Time (MST) to Eastern Standard Time (EST) instantly. EST is always 2 hours ahead of MST. Enter any MST time to get EST.
  • EST to IST Converter
    Convert Eastern Standard Time (EST) to India Standard Time (IST) instantly. IST is 10 hours 30 minutes ahead of EST. Enter any time to convert.
  • PST to IST Converter
    Convert PST (Pacific Standard Time, UTC−8) to IST (India Standard Time, UTC+5:30) instantly. Add 13 hours 30 minutes with automatic day rollover.
  • IST to PST Time Converter
    Convert India Standard Time (IST) to Pacific Standard Time (PST) instantly. PST = IST − 13.5 hours. Enter the IST hour and minute to get the PST time.
  • EST to PDT Converter
    Convert Eastern Standard Time (EST) to Pacific Daylight Time (PDT) instantly. PDT = EST − 3 hours. Enter any hour and minute to see the Pacific time.
  • IST to EST Time Converter
    Convert India Standard Time (IST) to US Eastern Standard Time (EST). Enter an IST hour and minute to get the equivalent EST time (IST − 10h 30m).
  • GMT to IST Converter
    Convert GMT to IST (India Standard Time) instantly. IST = GMT + 5:30. Enter any GMT hour and minute to get the exact India time, plus day rollover.
  • PST to EST Converter
    Convert Pacific Standard Time (PST) to Eastern Standard Time (EST) instantly. EST is 3 hours ahead of PST. Enter a time and get the EST equivalent.
  • GMT to PST Converter
    Convert GMT (UTC) to Pacific Standard Time instantly. Enter a GMT hour and minute to get the equivalent PST time in 12-hour and 24-hour format.
  • EST to CST Converter
    Convert Eastern Standard Time (EST) to Central Standard Time (CST) instantly. Enter the EST hour and minute to get the equivalent CST time (EST − 1 hour).
  • Add or Subtract Hours from a Time Calculator
    Add or subtract hours from any start time and get the resulting clock time. Wraps correctly past midnight using a 24-hour, mod-1440 calculation.
  • Current Unix Timestamp Calculator
    Convert milliseconds to a Unix timestamp (epoch seconds). Get the current epoch now plus minutes, hours, and days since Jan 1, 1970 UTC.
  • Arrival Local Time Across Time Zones Calculator
    Calculate your arrival local time after a flight across time zones. Enter departure time, flight duration and UTC offsets to get destination local time and day offset.
  • Epoch Milliseconds to Date Converter
    Convert a Unix epoch timestamp in milliseconds to a human-readable UTC date and time (ISO 8601), with year, month, day, hour, minute and second breakdown.
  • What Time Will It Be in X Hours?
    Find out what time it will be in X hours from any start time. Enter a start time and number of hours to get the result in 24-hour HH:MM format.
  • EST to UTC Converter
    Convert Eastern Standard Time (EST) to Coordinated Universal Time (UTC) instantly. EST is UTC−5, so UTC = EST + 5 hours (mod 24).

Frequently asked questions

What do these timezone calculators help me do?

They convert a given time from one zone to another — useful for scheduling meetings across continents, coordinating with remote teams, or figuring out when a broadcast or deadline lands locally. You can convert from UTC to any major US zone, to Indian Standard Time, or between any two zones worldwide using the general Time Zone Converter.

Are the converters free to use?

Yes — completely free. No account, subscription, or download is needed. Open any converter on a phone, tablet, or desktop browser and start converting right away.

How accurate are the time-zone conversions?

The converters follow official UTC offset rules for each zone, including daylight-saving transitions as defined by each jurisdiction. Results are reliable for everyday scheduling and coordination. For legally or contractually time-sensitive purposes — contracts, filing deadlines, audit logs — verify the exact offset against an authoritative source such as the IANA Time Zone Database.

Do you store the times I enter?

No. All calculations run entirely in your browser. Nothing you enter is sent to a server or saved anywhere — close the tab and it is gone completely.

How do I find the most-used or trending converters?

The default Popular list ranks every tool by real user traffic, so the most-reached-for converters sit at the top. You can also flip to the Trending tab for tools gaining momentum, Recently Added for the newest entries, or Last Updated to find freshly revised tools.

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