Calculators Tools

Calculate the precise difference between two dates in years, months, weeks, days, hours, minutes, and seconds. Perfect for tracking project durations, age calculations, event countdowns, and more.

Calculate the exact number of days between two dates. Get instant results for total days, business days, weekends, and more. Perfect for project planning, vacation tracking, and deadline management.

Calculate the duration between two dates and times. Get results in days, hours, minutes, and seconds.

Calculate days until any future date with countdown for important events, deadlines, and milestones.

Display current time in multiple cities around the world. Compare time zones and schedule across regions.

Add or subtract days, weeks, months, or years from any date to calculate future or past dates with precision.

Online stopwatch timer with lap tracking. Measure time intervals precisely for sports, cooking, work tasks, and more.

Calculate business days between two dates, excluding weekends and optional holidays for accurate work-day planning.

Calculate aspect ratios, find missing dimensions, and convert between different aspect ratios for videos, images, and screens. Supports 16:9, 4:3, 21:9, and more.

Find out what day of the week any date falls on - past, present, or future dates instantly.

Set a countdown timer for any duration. Perfect for cooking, workouts, meetings, and time management with customizable timers and preset options.

Calculate DPI (dots per inch), image dimensions, and print sizes. Convert between pixels and physical dimensions for printing and displays.

Count down to special events and important dates. Perfect for weddings, birthdays, vacations, project deadlines, and celebrations with live time tracking.

Calculate PPI (pixels per inch) for screens and displays. Find pixel density from resolution and screen size for phones, tablets, monitors, and TVs.

Calculate which day number (1-365/366) any date is in its year. Track progress through the year and find milestone days.

Boost productivity with the Pomodoro Technique: work in focused 25-minute intervals with short breaks. Perfect for studying, coding, writing, and focused work.

Calculate ISO week number for any date. Find which week (1-53) of the year any date falls in.

Add or subtract hours, minutes, and seconds to/from any time. Perfect for calculating flight arrivals, work schedules, cooking times, and time zone conversions.

Check if any year is a leap year. Understand leap year rules and find past or future leap years instantly.