N 400 Days Outside US Calculator

What is the N 400 Days Outside US Rule?

The N 400 Days Outside US Rule is a provision in US immigration law that allows certain individuals to qualify for permanent residency or citizenship by demonstrating they have lived outside the US for at least 400 days in the past 5 years. This rule is particularly relevant for individuals who have dual citizenship or who have lived abroad for extended periods.

Key Points About the N 400 Days Rule

• The rule applies to individuals who have lived outside the US for at least 400 days in the past 5 years
• It is often used to qualify for permanent residency or citizenship
• The calculation is based on the total number of days spent outside the US
• There are specific requirements for how the days are counted

How to Use This Calculator

Using the N 400 Days Outside US Calculator is straightforward. Follow these steps:

1. Enter the start date of your first period outside the US
2. Enter the end date of your first period outside the US
3. If you have additional periods outside the US, click "Add Another Period" and enter the dates
4. Click "Calculate" to determine if you meet the 400-day requirement

The calculator will display your total days outside the US and indicate whether you meet the 400-day requirement.

Formula and Assumptions

The N 400 Days Outside US Calculator uses the following formula:

The calculator makes the following assumptions:

• All periods outside the US are counted
• Days are calculated as full days (partial days are not counted)
• The calculation is based on the past 5 years

Worked Example

Let's look at an example to illustrate how the calculator works.

Example Scenario

You have lived outside the US in the following periods:

• January 1, 2022 - March 31, 2022 (90 days)
• June 1, 2022 - August 31, 2022 (92 days)
• November 1, 2022 - January 31, 2023 (92 days)

Total days outside the US: 90 + 92 + 92 = 274 days

Since 274 days is less than 400 days, you do not meet the requirement.