Time & Date

Age Calculator From Date of Birth

Free age calculator from date of birth. Get exact age in years, months, and days, a next birthday countdown, and fun facts like your generation.

Countdown Calculator

Count down to any date and time in days, hours, minutes, and seconds — live-updating, with presets for popular dates like New Year's and Christmas.

Days Between Dates Calculator

Free days between dates calculator with business day count. Get total days, weeks and days, months and days, and a month-by-month breakdown instantly.

Meeting Time Finder

Find overlapping working hours across up to 3 time zones to schedule a meeting everyone can actually attend, with correct daylight saving time handling.

Overtime Calculator

Calculate overtime pay at a single hourly rate — regular pay, overtime pay, and total gross pay for the week. Adjustable overtime threshold and multiplier.

PTO Calculator

Calculate your accrued PTO balance from your annual allotment, pay period frequency, and days already used. Covers vacation, sick, and combined PTO plans.

Time Duration Calculator

Calculate the exact duration between two clock times, in hours, minutes, and decimal hours. Handles durations that cross midnight.

Time Zone Converter

Convert a date and time between time zones with correct daylight saving time handling for the exact date you enter, across 13 major world time zones.

Timesheet Calculator

Enter real clock-in and clock-out times for each day of the week and get your actual weekly total hours and gross pay — not a projection from a single day.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Automatically detects seconds vs. milliseconds, with ISO 8601 and UTC output.

Weighted Overtime Calculator

Calculate weighted overtime (blended rate) under FLSA rules for employees working multiple jobs at different pay rates. Free payroll calculator.

Work Hours Calculator With Lunch Break

Free work hours calculator with lunch break deduction. Enter start and end time to get decimal hours, total minutes, and weekly or monthly totals instantly.

How to Calculate Work Hours with Lunch Break (Formula + Free Calculator)

Learn how to calculate work hours with lunch break using a clear formula and real examples, plus try our free work hours calculator for instant results.

How to Calculate Age from Date of Birth (Manual Formula + Free Tool)

Learn how to calculate age from date of birth manually, in exact years, months, and days, plus try our free age calculator for instant, accurate results.

How to Calculate Days Between Two Dates (Including Business Days Only)

Learn how to calculate days between two dates, including business days only and weeks, plus use our free days between dates calculator for instant totals.

UTC

UTC (Coordinated Universal Time) is the primary time standard the world coordinates against — every time zone is defined as a fixed or seasonal offset from it. Unlike local time zones, UTC never observes daylight saving time, which is why servers, APIs, and scheduling systems typically store timestamps in UTC and convert to a local time zone only for display.

Unix Time

Unix time (also called epoch time) is the number of seconds elapsed since midnight UTC on January 1, 1970, ignoring leap seconds. It represents a single absolute instant with no time zone attached, which is why most databases, APIs, and log files store timestamps this way internally rather than as formatted local dates.