Citizenship tools and calculators

Eligibility Calculator

When can you apply? Estimate your eligibility date from your green card date.

90-Day Filing Calculator

The exact earliest date you can file Form N-400 without getting rejected.

Mock Interview

Rehearse the entire USCIS interview with an officer who questions every answer.

Civics Practice Test

20 questions, scored just like the real 2025 civics test.

All 128 Civics Questions

Study every official question and answer at your own pace.

Current Civics Answers

The President, Vice President, Speaker, and Chief Justice answers, kept up to date.

Continuous Residence Calculator

Add your trips and see whether any of them break your continuous residence.

Document Checklist Generator

Answer a few questions and get a printable list of what to bring to your interview.

Fee and Fee-Waiver Checker

See the current fee and whether you qualify for a reduced fee or a waiver.

Will I Lose My Citizenship?

Find your country and see whether you can keep your original citizenship after you naturalize.