Naturalization Physical Presence Calculator accuracy and testing

Formula source

• Estimated physical-presence days = total window days - days outside the United States. Total window days uses the selected inclusive or exclusive date-counting assumption. Days above/below threshold = estimated physical-presence days - required threshold.

Test cases

Known limitations

• This calculator does not determine naturalization eligibility. It does not classify trips, verify travel history, apply legal exceptions, or account for all requirements beyond simple physical-presence arithmetic.

Assumptions

• This is a planning estimate only, not legal advice, not an official government eligibility decision, and not an official deadline determination.
• The date window, absence days, threshold, and inclusive-counting choice are user-entered assumptions.
• The calculator does not evaluate continuous residence, good moral character, filing jurisdiction, exceptions, military rules, marital eligibility, or any other legal requirement.
• Dates and thresholds are processed locally in your browser and are not stored by Calwarden.

Unit handling

• Period Start Date accepts calendar dates.
• Period End Date accepts calendar dates.
• Days Outside United States accepts values in days.
• Required Physical-Presence Threshold accepts values in days.
• Inclusive Date Counting accepts Yes/No values.
• Estimated Physical-Presence Days is displayed in days.
• Total Window Days is displayed in days.
• Days Above/Below Threshold is displayed in days.
• Physical-Presence Share is displayed as a percentage.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Percent outputs are displayed with two decimal places.
• Input precision follows configured step values where provided.

Version history

Change log