World Time Calculators

Calculate epoch converter, timestamp converter and time zone converter and other world time calculations.

Popular:Epoch ConverterTimestamp ConverterTime Zone ConverterUnix Timestamp ConverterWorld Clock

All World Time Calculators

Epoch ConverterConvert an epoch time (seconds since 1 January 1970 UTC) into a readable date and time.Timestamp ConverterConvert a numeric timestamp (seconds since 1 January 1970 UTC) into a readable date and time.Time Zone ConverterConvert a time of day between major world time zones, such as IST, UTC, EST, and JST.Unix Timestamp ConverterConvert a Unix timestamp (seconds since 1 January 1970 UTC) into a readable date and time.World ClockSee the equivalent time in several major world time zones at once, from a single reference time.

World Time Guides

Date & Time2 min read

How a Raw Timestamp Becomes a Real Countdown to an Event

A launch date buried in an API response as a raw Unix timestamp converts to a real calendar date, and that same date, fed straight into the countdown calculator, produces the exact same 110-day countdown as typing the date in directly.

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Date & Time1 min read

How a Unix Timestamp Converts Into a Readable Date

A Unix timestamp is just a count of seconds since 1 January 1970 UTC — adding that many seconds to the epoch gives the exact date and time it represents, in UTC.

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Date & Time2 min read

How Timezone Conversion Works (And Why the Date Can Change Too)

Converting a time between timezones is simply adding or subtracting the fixed offset between them — but because that offset is often several hours, the converted time can land on the previous or next calendar day, which is why a timezone converter needs to report a date shift, not just a new clock time.

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Date & Time2 min read

What Is a Unix Timestamp? (And How to Read One)

A Unix timestamp is simply the number of seconds elapsed since 1 January 1970, 00:00:00 UTC (the "Unix epoch") — a single, unambiguous, timezone-independent number that computers use internally to represent a moment in time, before it's converted to a human-readable date for display.

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Other Date & Time Subcategories

Date Calculations11 calculatorsExplore →Time Arithmetic7 calculatorsExplore →Countdowns5 calculatorsExplore →Date Arithmetic3 calculatorsExplore →