Calculate the difference between two dates in years, months, days, weeks, hours, and more.
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Have you ever needed to know the exact number of days until a big event? Or perhaps you need to calculate a contract's end date a specific number of months from today? Our free online Date Calculator is your versatile solution. It's the perfect tool for calculating days between dates, determining project timelines, or simply satisfying your curiosity about time.
Our primary tool helps you find the date difference between any two dates. Just select your start and end dates to instantly get the total number of days, weeks, months, and years. It’s perfect for counting down to anniversaries, birthdays, or important deadlines.
Our second feature allows you to add days to a date to find a future date, or subtract to find a past one. Need to know what day it will be 90 days from now? Or what date a 1-year contract will expire? Our calculator handles it all, accurately managing leap years and different month lengths with precision.
Beyond calculating days until an event, our tool is a must-have for project managers, students, or anyone who needs to quickly plan and schedule.
Need to do more than just date math? Explore our Percentage Calculator for everyday calculations, our Unit Conversion Calculator for all your conversions, and our Mortgage Calculator to plan your financial future.
Input the first date (earlier date) for your calculation.
Input the second date (later date) for your calculation.
Select whether to calculate difference or add/subtract days from a date.
Get the difference in years, months, days, and total days.
Use the results for project planning, age calculations, or event scheduling.
Brief time period suitable for short-term planning, immediate deadlines, or recent events.
Moderate time span good for project planning, seasonal activities, or medium-term goals.
Extended period suitable for long-term planning, career goals, or major life events.
Significant time span often used for historical analysis, lifetime planning, or generational comparisons.
Find years, months, weeks, and days between dates, or add/subtract a duration from a base date. Handles leap years and month length changes.
Find the exact time between two dates, or add/subtract a duration from a base date. Leap years and month lengths are handled for you.
Years, months, weeks and days at a glance.
Difference mode, plus add/subtract mode.
Good for contracts, countdowns and schedules.
Date calculator, difference between dates, add days to a date, weeks and months between dates
Important: This date difference calculator is designed for general calendar calculations and time planning purposes using standard Gregorian calendar arithmetic. While calculations are mathematically accurate for date differences, business day calculations, working day exclusions, and time span measurements, the tool does not account for specific business calendars, regional holidays, timezone differences, daylight saving time transitions, or specialized calendar systems that may be relevant to your specific use case. For legal deadlines, contract terms, financial calculations, project planning, or business-critical date calculations, verify results using appropriate business calendar systems and consult with relevant professionals who understand the specific requirements and regulations applicable to your situation.