Days Between Dates
Free date calculator to count days, weeks, months, and years between any two dates. Track deadlines and plan events with precision.
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Calculate Time Between Any Two Dates
Planning an event? Tracking a deadline? Counting down to something special? Our days-between calculator tells you exactly how much time separates any two dates—in days, weeks, months, and years. Never miscalculate another deadline or anniversary again.
Understanding Date Differences
Calculating the difference between dates involves more than simple subtraction because months have different lengths, leap years add extra days, and time zones can affect the exact count. Our calculator handles all these complexities automatically. Date math is essential for project management, event planning, financial calculations (interest, due dates), and legal matters where exact day counts matter.
Basic Concept
Days Between = End Date - Start DateWhy Use Our Date Calculator?
Multiple Time Units
See the difference in days, weeks, months, and years—all calculated accurately.
Handles Complexity
Automatically accounts for leap years, varying month lengths, and calendar quirks.
Two-Way Calculation
Works for past dates (how long ago) and future dates (how long until).
How to Calculate Days Between Dates
Date Calculation Scenarios
Project Management
Calculate project durations, milestone timelines, and deadline countdowns.
Travel Planning
Count days until departure, trip length, and time until return.
Financial Planning
Calculate interest periods, payment due dates, and investment timeframes.
Personal Milestones
Track anniversaries, count days since important events, or plan celebrations.
Frequently Asked Questions
By default, we calculate the difference between dates (end minus start), which doesn't include both endpoints. If you need to count both days inclusively (like counting vacation days), add 1 to the result.