---
title: "Date Difference Calculator | Numequo"
description: "Count days and weeks between any two dates. Enter your values to get a clear result, then review the formula, examples and practical explanations."
canonical: "https://www.numequo.com/time/dates-calendar/date-difference-calculator/"
locale: "en"
---
[Numequo](https://www.numequo.com/) › [Time](https://www.numequo.com/time/) › [Dates and calendar](https://www.numequo.com/time/dates-calendar/)

# Date Difference Calculator

Compare two calendar dates, with an optional inclusive end date.

## Input data

- **Start date** - type: date; default: 2026-01-01
- **End date** - type: date; default: 2026-12-31
- **Include end date** - type: choice; default: no; options: No, Yes

## How it works

Total days are calculated from UTC calendar dates to avoid daylight-saving shifts.

## Quick examples

- **Full year 2026** - Start date: 2026-01-01, End date: 2026-12-31, Include end date: yes
- **Two weeks** - Start date: 2026-08-01, End date: 2026-08-15, Include end date: no
- **Leap February** - Start date: 2024-02-01, End date: 2024-03-01, Include end date: no

## Understanding your result

The result is the absolute interval between both dates. Enabling the inclusive option adds the end date itself, while the summary indicates which date comes first.

Last verified: 29 September 2026 (2026-09-29)

## Frequently asked questions

### Is the end date included?

Only when you select the inclusive option.

### Are leap days counted?

Yes. Every real calendar day is counted.

### Does daylight saving affect the result?

No. Dates are compared at UTC midnight.

### Can the start be after the end?

Yes. The calculator reports the absolute interval and indicates the order.

## Related calculators

- [Age Calculator](https://www.numequo.com/time/dates-calendar/age-calculator/) - Calculate an exact age between two dates.
- [Business Days Calculator](https://www.numequo.com/time/dates-calendar/business-days-calculator/) - Count business days between two dates with configurable weekends and holidays.
- [Date Add or Subtract Calculator](https://www.numequo.com/time/dates-calendar/date-add-subtract-calculator/) - Add or subtract days, weeks, months or years from any calendar date.
- [Due Date Calculator](https://www.numequo.com/time/dates-calendar/due-date-calculator/) - Add calendar, business or working days to calculate a due date.
- [ISO Week Number Calculator](https://www.numequo.com/time/dates-calendar/iso-week-number-calculator/) - Find the ISO week number and week-based year for any date.
- [Day of the Week Calculator](https://www.numequo.com/time/dates-calendar/day-of-week-calculator/) - Find which weekday corresponds to any valid calendar date.

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