Date & Time
Date Difference Calculator
Calculate days between two dates with a years, months, and days breakdown.
- Mobile Friendly
- Accessibility Tested
- Formula Verified
- SEO Optimized
- Fast Loading
- Responsive
Version 1.0.0 · Last reviewed
Tool
Result
Live output from your inputs
Enter values and calculate to see results.
How it worksShow guideHide guide
Introduction
Find the number of days between two dates, plus a years/months/days breakdown. Runs fully in your browser.
Formula
Absolute calendar difference between two dates in days, with Y/M/D breakdown.
- d1 — Start date
- d2 — End date
Step-by-step
- Enter the start date.
- Enter the end date.
- Compute absolute day count and calendar Y/M/D breakdown.
Worked example
From 1 Jan 2024 to 1 Jan 2025 is exactly 1 year (366 days if 2024 is a leap year).
Use cases
- Project duration between two milestones
- Count days until an event
- HR / leave day estimates
Frequently asked questions
What if end is before start?
The tool returns the absolute difference and notes the order in the breakdown.
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