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Date & Time Tools

Every date & time tool on Online Tool Store, in one place. Runs entirely in your browser — nothing is ever uploaded.

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Habitable Zone Estimator

Quick, free Habitable Zone Estimator in your browser

Moon Landing Anniversary Countdown

Quick, free Moon Landing Anniversary Countdown in your

Nozzle Temperature Reference

Quick, free Nozzle Temperature Reference in your browser

Pizza Dough Calculator

Quick, free Pizza Dough Calculator in your browser

Solstice and Equinox Finder

Quick, free Solstice and Equinox Finder in your browser

Day of Week Finder

Find the weekday for any date

Business Days Calculator

Count working days between dates

Hours Calculator

Calculate hours between two times

Age Calculator

Find your exact age and next birthday

Countdown Timer

Simple countdown with alarm sound

Alarm Clock

Set a browser-tab alarm for any time of day

Pomodoro Timer

A focus timer with work and break cycles

Stopwatch

A precise stopwatch with lap times

World Clock

Live clocks for cities you choose

Timesheet Calculator

Weekly work hours with breaks and overtime

Calendar Generator

Generate printable monthly calendars for any year

Birthday Countdown

Days until your next birthday

Moon Phase Calculator

Moon phase, age, and illumination for any date

Leap Year Checker

Check any year and see the next five leap years

Date Difference Calculator

Find the exact span between two dates

Days Until Calculator

Live countdown to any future date

Time Duration Calculator

Add and subtract hours and minutes

Retirement Date Calculator

Date you hit retirement age or tenure

Chinese Zodiac Calculator

Animal year from birth date

Decimal Time Converter

Minutes to decimal hours for payroll

Military Time Converter

12-hour and 24-hour clock conversion

Meeting Planner

Find overlap hours across team time zones

Anniversary Calculator

Milestone dates from a start date

Date to Roman Numerals

Convert dates into Roman numeral strings

Week Number Lookup

ISO week number for any date

Countdown Timer Maker

Build a live countdown to any date

Zodiac Sign Finder

Zodiac Sign Finder

Date Adder

Add or subtract time, with the edge cases shown

Time Zone Converter

Compare times across multiple cities

Sunrise Sunset Lookup

Daylight times from coordinates offline

Current Time

See the exact time in any time zone

Fermentation Timer

Time a ferment against temperature

Dough Proofing Estimator

Estimate proof time at your dough temperature

Time-Lapse Interval Calculator

Plan frame intervals for motion capture

Egg Timer Calculator

Time eggs for the perfect boil

Daylight Hours Calculator

Estimate daylight length from the date and place

Livestock Due Date Calculator

Calculate an expected birth date for farm animals

Notice Period Calculator

Find your last working day from notice dates

Golden Hour Calculator

Calculate golden hour and blue hour times for a location

Time Zone Meeting Planner

Coordinate meeting times across zones

Flight Layover Timer

Estimate layover windows

Recurring Event Date Generator

Generate all occurrence dates for a recurring event rule

Public Holiday Overlap Finder

Find overlapping public holidays between two selected countries

Countdown to Multiple Time Zones

Show one event's countdown across several time zones

Recurring Bill Due Date Tracker

Track upcoming due dates for recurring bills