U.S. immigration calculators
Many immigration questions come down to "which day": the earliest date you can file, the date your status expires, whether your child will age out. These tools calculate using the rules written in the statutes and regulations, and cite their sources so you can check them yourself. All calculations run in your browser; nothing is uploaded.
Results are for reference only and are not legal advice. Individual cases often involve exceptions; if you are unsure, book an attorney consultation.
N-400 filing date + days in the U.S. calculator
Enter your green card date and travel history to find your earliest filing date and actual days in the U.S., with long trips that may break continuous residence flagged.
CSPA child age calculator
Calculate your child's CSPA age under the Child Status Protection Act to see whether they can still immigrate with you as a child under 21.
OPT / STEM OPT timeline
Find your OPT filing window, start and end dates, STEM extension window, unemployment-day limits and grace period.
H-1B / L-1 maximum stay calculator
Calculate the 6-year / 7-year / 5-year limit plus recapturable time abroad, with the 240-day rule date.
Green card travel risk check
Enter your departure and return dates to see whether the trip exceeds 6 months or 1 year and whether you need a reentry permit.
I-485 document checklist
Generate a checklist for employment- or family-based cases and for the principal applicant, spouse or child; check items off and print it.
The tools can calculate dates, but they cannot replace judgment about your case. Book an attorney consultation and we will advise you based on your full situation.