Date Calculator — Days Between Dates

Calculate the number of days, weeks and working days between two dates. Add or subtract days from a date.

Last updated: April 2026 · Source: GOV.UK — UK bank holidays

Days Between Two Dates

Add or Subtract Days

Disclaimer

This calculator is provided for informational purposes only and should not be considered as financial or tax advice. All calculations are performed locally in your browser — no personal data is collected or sent to our servers. Rates and thresholds are sourced from HMRC and GOV.UK and are updated for the current tax year. Always verify results with HMRC or consult a qualified professional before making financial decisions.

How It Works

This calculator finds the exact number of days, weeks, months and years between any two dates. You can choose to include or exclude weekends and UK bank holidays, making it useful for calculating working days for employment notice periods, project timelines or legal deadlines.

The UK has eight permanent bank holidays in England and Wales (Scotland has nine, Northern Ireland has ten). When calculating business days, the tool accounts for these automatically based on the nation you select. It also handles leap years correctly.

You can also add or subtract a set number of days, weeks or months from a given date. This is handy for calculating due dates, contract expiry or the end of a notice period.

Example: Days between 1 January and 31 March 2026

  1. Calendar days: 89
  2. Weeks and days: 12 weeks and 5 days
  3. Working days (excluding weekends): 63
  4. Working days (excluding weekends and bank holidays): 61

Source: GOV.UK — UK bank holidays

Frequently Asked Questions

What does the Date Calculator — Days Between Dates do?
Calculate the number of days, weeks and working days between two dates. Add or subtract days from a date. All calculations are performed in your browser using official UK rates and thresholds.
Is this calculator free to use?
Yes. All calculators on Calks.uk are completely free to use. No account or registration is required. All calculations run in your browser — no data is collected.
Can I use this on my phone?
Yes. All our calculators are fully responsive and work on smartphones, tablets and desktop computers. The interface adapts to your screen size automatically.