Date Difference Calculator

Use our free date difference calculator to find the exact duration between any two dates. Shows years/months/days, total days, weeks+d days, total hours, minutes, seconds, and approximate weekday/weekend counts.

Math

Start Date (YYYY-MM-DD)

End Date (YYYY-MM-DD)

Formula

Calculate the exact duration between any two dates. The calculator always uses the earlier date as start and returns the difference in years, months, days, total days, weeks+d days, total hours, minutes, seconds, and approximate weekday/weekend breakdown.

Difference = |Date2 − Date1| in days, then decompose

Percentage: The percentage value you want to apply

Number: The original number or value

Result: The calculated result

How It Works

1Enter the first date.
2Enter the second date.
3Click Calculate to see the full breakdown.

Examples

Jan 1 to Dec 31, 2024

1.2024 is a leap year, so 366 days

Result: 366

Jan 1, 2023 to Jan 1, 2024

1.365 days = 52 weeks + 1 day

Result: 365

Frequently Asked Questions

The absolute difference in milliseconds is converted to days, then decomposed into years, months, and days accounting for calendar boundaries.

No — the calculator automatically uses the earlier date as start.

They are approximate (5/7 and 2/7 of total days) for a quick estimate.

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CalculateMe Team

Last updated: 2026-07-15

Date Difference Calculator

Formula

How It Works

Examples

Jan 1 to Dec 31, 2024

Jan 1, 2023 to Jan 1, 2024

Frequently Asked Questions

How is the difference calculated?

Does order matter?

Are weekdays and weekends exact?

Related Calculators

Date Difference Calculator

Formula

How It Works

Examples

Jan 1 to Dec 31, 2024

Jan 1, 2023 to Jan 1, 2024

Frequently Asked Questions

How is the difference calculated?

Does order matter?

Are weekdays and weekends exact?

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