British citizenship
UK citizenship absence calculator
This calculator helps standard 5-year naturalisation applicants estimate whole days outside the UK against the usual 450-day qualifying-period limit and the final 12-month absence limit.
The interactive calculator loads with JavaScript and lets you enter trip dates, review the qualifying period, and export a summary. This page is guidance only, not legal advice. Always check GOV.UK Form AN guidance before applying.
What to prepare
- Your intended citizenship application date.
- Departure and return dates for each trip outside the UK.
- Any notes you need to compare with official naturalisation guidance.