What is a Unix timestamp?

A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It is a standard way for computers to track time, used in most programming languages and databases. Use our epoch converter to convert between Unix timestamps and human-readable dates.

How do I convert between time zones?

To convert between time zones, find the UTC offset for each zone (e.g., EST is UTC-5, GMT is UTC+0) and calculate the difference. Our timezone converter handles all conversions automatically, including daylight saving time adjustments.

How many days between two dates?

To find the number of days between two dates, subtract the earlier date from the later date. Our days-between-dates calculator does this instantly and also shows weeks, months, and years. It can optionally exclude weekends for business day calculations.

Every Time Calculation
You'll Ever Need

Precise time, date, and timezone tools for developers, remote teams, and travelers. Fast. Accurate. No signup required.

Epoch — UTC --:--:-- Today --- --- -- Day --/--- · W-- World Clock NYC--:-- LDN--:-- DXB--:-- TYO--:--

Timezones

For remote teams, travelers, and global coordination.

Timezone Converter

Convert any time between any two time zones, with DST handled automatically.

Popular

World Clock

Current time in all major cities around the world, live.

Meeting Time Planner

Find the best overlap hour for a meeting across multiple time zones.

Popular

Time Difference Calculator

How many hours ahead or behind is any city from another?

Date & Duration

Evergreen tools for planning, HR, legal, and everyday use.

Age Calculator

Calculate exact age in years, months, and days from any date of birth.

Days Between Dates

Calculate the exact number of days (or business days) between any two dates.

Most Used

Add Days to Date

What date is it 30, 60, or 90 days from today?

Countdown Timer

How many days, hours, and minutes until any date?

Business Days Calculator

Count working days between dates, excluding weekends and holidays.

Work Hours Calculator

Calculate total hours worked from clock-in and clock-out times.

Time Units

Simple, fast, evergreen.

Military Time Converter

Convert between 12-hour and 24-hour (military) time.

Hours to Minutes

Convert hours (and fractions of hours) to minutes.

24 to 12 Hour Converter

Quickly convert any 24-hour time to 12-hour AM/PM format.

Time to Decimal Calculator

Convert hours:minutes to decimal hours for payroll and billing.

Days to Hours Converter

Convert any number of days to hours instantly.

Developer

Bookmark-worthy precision tools — used daily, not just once.

Epoch Converter

Convert Unix timestamps to dates and back. Shows current epoch time live.

Dev Favorite

UTC Time Now

Current UTC time, updated every second. No fluff.

Cron Expression Generator

Build cron expressions visually and see them in plain English.

ISO 8601 Converter

Convert between ISO 8601 format and readable dates.

Date Format Converter

Convert between date formats: MM/DD/YYYY, DD/MM/YYYY, YYYY-MM-DD, and more.

Why Use TimeMath?

TimeMath is a free collection of time, date, and timezone tools built for people who work with time every day. Developers use the epoch converter and cron generator. Remote teams use the timezone converter and meeting planner. Everyone uses the days-between-dates calculator and countdown timer.

Every tool on this site runs entirely in your browser. There are no signups, no server-side processing, and no data collection. Enter your values, get your result instantly, and move on. All calculations use the Intl API and standard date-time libraries for accuracy across time zones and daylight saving transitions.

TimeMath covers four categories: timezone tools for converting and comparing times worldwide, date and duration calculators for counting days and planning deadlines, time unit converters for switching between formats, and developer tools for working with Unix timestamps, ISO 8601 strings, and cron expressions. Bookmark the tools you use most and come back anytime.

Every Time Calculation You'll Ever Need