A professional, client-side calculator helping applicants prepare their N-400 travel records safely.
CitizenCalc was founded to resolve a major procedural bottleneck in the U.S. naturalization process: compiling and auditing Form N-400 travel history logs.
Under Section 316(a) of the Immigration and Nationality Act (INA), U.S. citizenship applicants must list all international trips lasting 24 hours or longer over a statutory period of 3 or 5 years. While the official CBP I-94 Portal allows users to view their logs, the website displays this data as an unpaired list of raw arrivals and departures.
This requires applicants to manually pair entry and exit events, handle partial-day exclusions, calculate durations, and compile them into structured tables. Errors in these counts can lead to application delays or denials due to continuous residence breaks or physical presence day count issues. CitizenCalc automates this sorting process completely inside the user's browser sandbox.
Immigration travel logs and passport details are highly sensitive. Many online helpers require users to upload their travel histories to remote servers, exposing private records to database breaches, corporate trackers, and potential leaks.
To ensure total privacy, CitizenCalc uses a **zero-server static architecture**. All text parsing, layout generation, and mathematical metrics are computed strictly locally inside your web browser. No travel history, names, A-numbers, or flight details are ever uploaded to a server, stored in a database, or transmitted over the internet.
You can verify this protocol by loading the webpage, turning off your internet connection (entering offline mode), pasting your records, and performing calculations. The calculator remains fully functional offline.
Our tools are engineered to comply with the official rules set forth in the USCIS Policy Manual (Volume 12, Part D) and 8 CFR § 316.5. All formulas, transition-day definitions, and calculations are regularly audited to ensure parity with official standards.
To maintain high editorial and regulatory quality, our guides and calculators are reviewed voluntarily by our technical review panels, comprising independent software developers and immigration specialist editors who verify that the algorithms adapt to active USCIS rule changes (such as leap year counting and early filing windows).
Please note that CitizenCalc is an independent software tool and is not affiliated with the U.S. Citizenship and Immigration Services (USCIS) or any government agency. We do not provide legal representation or counsel.
We are dedicated to maintaining the reliability of CitizenCalc. Please contact our team via the appropriate channel:
For calculator suggestions, content comments, or partnership inquiries:
contact@citizencalc.comFor calculation bug reports, parser errors, or browser alignment issues:
support@citizencalc.com