Passport Expiry Calculator
Compare a passport expiry date with a selected travel-date rule; verify all destination requirements with official guidance.
Formula and sources updated · Data sources · 2View algorithm, constants and default inputs (JSON)
Results
About this calculator
Compare the passport expiry date with one selected date rule. Requirements vary by destination, nationality, transit, and itinerary. This page does not check the passport issue date, visa rules, or blank pages; confirm all current requirements with the destination’s official guidance.
Worked example
calculated with the default values below
Passport expiry date 2027-01-31 · Date you enter / start the trip 2026-12-31 · Date you leave the destination / return 2027-01-09 · Destination requirement 6 months after trip start Months of validity left at departure 1.0 months · Passport must be valid until 2027-06-30 · Status Does not meet the selected date rule · Renewal timing guidance Check current passport-office processing and mailing times · Note Entry rules vary by destination and may depend on nationality, transit, and trip dates. Verify with official destination guidance; some countries also require blank visa pages.
Method and assumptions
v = 1 when expiry ≥ D_rule; M ≈ (expiry − D_dep) ÷ 30.44 Compares expiry with one selected date rule using UTC calendar dates; adding months clamps to the final valid day in the target month. It does not verify destination or nationality rules, passport issue date, visas, transit, or blank pages. Confirm with current official destination guidance. Compare the passport expiry date with one selected date rule. Requirements vary by destination, nationality, transit, and itinerary. This page does not check the passport issue date, visa rules, or blank pages; confirm all current requirements with the destination’s official guidance.
Data sources
Disclaimer
These calculators give general estimates. Sizing, pricing, availability and standards vary by brand, retailer and country, so treat the output as a starting point and confirm it against the seller's or authority's own figures.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
v = 1 when expiry ≥ D_rule; M ≈ (expiry − D_dep) ÷ 30.44
- expiry
- Passport expiry date
- D_dep
- Trip start / entry date
- D_ret
- Trip return / destination-exit date
- D_rule
- Date threshold selected by the rule
- M
- Approximate months remaining at departure (30.44 days)
Compares expiry with one selected date rule using UTC calendar dates; adding months clamps to the final valid day in the target month. It does not verify destination or nationality rules, passport issue date, visas, transit, or blank pages. Confirm with current official destination guidance.
Frequently asked questions
Does this calculator determine whether I can enter a country?
No. It compares the expiry date with one date rule you choose. Entry rules can depend on destination, nationality, transit and itinerary, and may include issue-date or blank-page requirements. Verify the current official rules for every destination and transit point.
Does this check every passport rule for my trip?
No. It compares expiry with the selected date rule only. For a three-month rule, use the date you leave the destination area; this is not necessarily the day you return home. The check does not cover passport issue-date limits, visas, nationality-specific rules, transit, or blank pages. For example, non-EU visitors to Schengen generally need a passport issued within the previous 10 years and valid at least three months after leaving; verify current official guidance.
Which inputs and limits apply to Passport Expiry Calculator?
Use the units shown beside each field. These are form limits, not recommended settings. v = 1 when expiry ≥ D_rule; M ≈ (expiry − D_dep) ÷ 30.44 Compares expiry with one selected date rule using UTC calendar dates; adding months clamps to the final valid day in the target month. It does not verify destination or nationality rules, passport issue date, visas, transit, or blank pages. Confirm with current official destination guidance. Compare the passport expiry date with one selected date rule. Requirements vary by destination, nationality, transit, and itinerary. This page does not check the passport issue date, visa rules, or blank pages; confirm all current requirements with the destination’s official guidance.
What is a complete worked example for Passport expiry date = 2027-01-12; Date you enter / start the trip = 2026-12-12?
Inputs: Passport expiry date = 2027-01-12; Date you enter / start the trip = 2026-12-12; Date you leave the destination / return = 2026-12-21; Destination requirement = 6 months after trip start. Calculation: v = 1 when expiry ≥ D_rule; M ≈ (expiry − D_dep) ÷ 30.44. Results: Months of validity left at departure = 1.0 months; Passport must be valid until = 2027-06-12; Status = Does not meet the selected date rule; Renewal timing guidance = Check current passport-office processing and mailing times; Note = Entry rules vary by destination and may depend on nationality, transit, and trip dates. Verify with official destination guidance; some countries also require blank visa pages.. Reference date: 2026-10-12 (UTC).