Create customizable real-time countdown timers to any future date, holiday, wedding, or product launch with live days, hours, and seconds.

Convert colors between HEX, RGB, HSL, and CMYK formats. Free online color format converter for developers and designers.

Calculate operational working hours between two dates, excluding weekends, custom opening/closing schedules, and lunch breaks.

Calculate working days between dates, excluding weekends and public bank holidays.

Calculate battery run-time in hours and minutes online. Free battery capacity calculator for UPS backups, solar storage, drones, and RV battery banks.

Free online alarm clock. Set alarms, choose sounds, and use snooze functionality directly in your browser.

Calculate the exact age difference between two people in years, months, days, hours, and find the exact date when one was twice as old as the other.

Free, fast, and secure age calculator pro tool for your everyday needs.

Free add or subtract days calculator. Calculate a future or past date by adding or subtracting days, weeks, months, or business days from any reference date.