Free NIC to DOB Converter for Sri Lanka
This free NIC to birthday calculator decodes the birth-year and day-of-year values embedded in Sri Lankan National Identity Card numbers. It supports both the older 10-character format (ending in V or X) and the newer 12-digit format. The results include the encoded date of birth, age today, weekday and gender code.
How to calculate your birthday from your NIC
- Type the full NIC number into the field above.
- Select Find Birthday.
- Check the displayed birthday and age against your official documents.
How Sri Lankan NIC birth-date codes work
The old NIC format uses the first two digits for the birth year (typically in the 1900s), followed by a three-digit day code. The newer NIC format uses four digits for the year and three for the day code. A day code greater than 500 has 500 subtracted when interpreting the date and indicates the female gender code. Leap years are handled automatically.
Accuracy and privacy
This is an informational decoder, not a government-issued NIC validation service. A correctly formatted number may still be fictitious, cancelled, or unissued. The calculator does not authenticate the check digit or identity. It performs the calculation in your browser rather than submitting your NIC to a website server.
Frequently Asked Questions
How can I find my birthday using my NIC number?
Enter your Sri Lankan NIC above. The tool decodes the embedded year and day code to calculate the birth date.
Does it support both old and new NIC numbers?
Yes. It accepts the older nine digits plus V/X format and the newer 12-digit numeric format.
Does the tool calculate age?
Yes. The age is calculated against your device's current local date.
Is the result an official NIC verification?
No. It only calculates information encoded in a number and does not verify its issuance or ownership.