# NIC Info — NIC to DOB Converter & Sri Lanka ID Card Details Online

> Free NIC to DOB converter — check Sri Lanka ID card details online. Instantly find birthday, age & gender from old (9-digit) and new (12-digit) NIC numbers. Developed by [Pubudu Tharanga](https://pubudu-tharanga.vercel.app).

## Links

- [NIC Info — Sri Lankan NIC Decoder](https://nicinfo.vercel.app/) — Main application & NIC decoder tool
- [Usage Guidelines & Verification Standards](https://nicinfo.vercel.app/guidelines.html) — NIC format specifications & conversion protocols
- [Privacy Notice & Data Protection](https://nicinfo.vercel.app/privacy.html) — Zero-data retention policy
- [Terms of Service & Operating Policy](https://nicinfo.vercel.app/policy.html) — Terms of use
- [Developer Portfolio](https://pubudu-tharanga.vercel.app) — Pubudu Tharanga
- [Department for Registration of Persons (DRP)](https://www.drp.gov.lk) — Official Sri Lankan authority

## Overview

[NIC Info — NIC to DOB Converter & Sri Lanka ID Card Details](https://nicinfo.vercel.app/) is a free web application that converts NIC numbers to date of birth (DOB). Check Sri Lankan ID card details online — extract birthday, age, and gender from any NIC number. Works entirely in the browser using client-side JavaScript, ensuring 100% privacy.

## Purpose

This tool decodes Sri Lankan NIC numbers to reveal encoded personal information:

- **Date of Birth / NIC to DOB**: Extracted from the day-of-year encoding within the NIC number. Converts any NIC number to birthday instantly.
- **Gender**: Determined by the day value (1–366 for male, 501–866 for female)
- **Age**: Calculated precisely from birthday to current date (years, months, days)

### Top Use Cases
- **NIC to DOB**: Convert NIC number to date of birth
- **NIC number detail online**: Check NIC number details online
- **ID number to birthday**: Find birthday from Sri Lankan ID number
- **Sri Lanka ID card check online**: Verify ID card information online
- **ID number details check**: Check encoded details from NIC/ID number

## NIC Decoding Formula

### Old Format (9 digits + letter)
- Structure: `YYDDDNNNNC`
- Example: `941234567V`
- `YY` → Birth year (e.g., 94 → 1994)
- `DDD` → Day of year (001–366 = male, 501–866 = female; subtract 500 for females to get actual day)
- `NNNN` → Unique serial number
- `C` → Check character: V = eligible voter, X = non-voter

### New Format (12 digits)
- Structure: `YYYYDDDNNNNN`
- Example: `199412345678`
- `YYYY` → Full 4-digit birth year
- `DDD` → Day of year (001–366 = male, 501–866 = female; subtract 500 for females)
- `NNNNN` → Unique serial number (5 digits)

### Gender Determination
- Day values 1–366 → **Male**
- Day values 501–866 → **Female** (subtract 500 to get actual calendar day)

### Day-of-Year to Calendar Date
- Day 1 = January 1
- Day 32 = February 1
- Day 60 = March 1 (non-leap year) or February 29 (leap year)
- Day 366 = December 31 (leap year only)

## Old NIC vs New NIC Comparison

| Feature | Old NIC (9-digit) | New NIC (12-digit) |
|---------|-------------------|---------------------|
| Length | 9 digits + V/X | 12 digits |
| Year Format | 2 digits (e.g., 95) | 4 digits (e.g., 1995) |
| Structure | YYDDDNNNNC | YYYYDDDNNNNN |
| Gender Encoding | Day + 500 for females | Same as old |
| Check Character | V (voter) or X | Numeric |
| Issued Since | 1972 | 2016 |

## Key Features

1. **Instant Decoding**: Results appear as you type — auto-decodes when a valid NIC length is reached
2. **Dual Format Support**: Supports both old (9 digits + V/X) and new (12 digits) NIC formats
3. **Privacy-First**: 100% client-side processing, zero server requests, no data storage
4. **Precise Age Calculation**: Calculates years, months, and days from birth date
5. **Dark/Light Mode**: Automatic (system preference) and manual theme switching
6. **Share Results**: Easy sharing via WhatsApp, Facebook, X/Twitter, and copy link
7. **Responsive Design**: Works on all devices (mobile, tablet, desktop)

## How to Use

1. Visit [nicinfo.vercel.app](https://nicinfo.vercel.app/)
2. Enter your NIC number in the input field (old or new format)
3. View your extracted birthday, gender, and precise age instantly
4. Click "Decode another" to check additional NIC numbers
5. Share the tool with friends using the share buttons

## Privacy & Security

This tool guarantees complete privacy:

- All calculations happen in your browser (client-side JavaScript)
- No NIC data is sent to any server
- No cookies are used to store NIC data
- No analytics tracking on NIC inputs
- No data logging or storage of any kind

## Technical Information

- **Stack**: Static HTML, CSS, and vanilla JavaScript
- **Processing**: 100% client-side — no server-side logic
- **Hosting**: [Vercel Edge Network](https://vercel.com)
- **Source**: [GitHub Repository](https://github.com/pubudutharanga/NIC-Info)

## Frequently Asked Questions

### How do I find my birthday from NIC number?
Enter your NIC number at [nicinfo.vercel.app](https://nicinfo.vercel.app/). The tool extracts the encoded birth date automatically from the day-of-year digits embedded in the NIC number.

### Is this tool safe to use?
Yes, 100% safe. Your NIC never leaves your device. All processing is done locally in your browser using client-side JavaScript.

### What's the difference between old and new NIC?
Old format has 9 digits + V/X letter (issued 1972–2015). New format has 12 digits only with a 4-digit year (issued since 2016 as Smart NIC).

### How does the NIC determine gender?
Day values 1–366 indicate male. Day values 501–866 indicate female (500 is added to the actual day-of-year for female citizens).

### What does V mean in a Sri Lanka NIC number?
The letter V at the end of an old-format (9-digit) NIC indicates the holder is an eligible voter. The letter X indicates the holder is not registered as a voter.

### Can I find a NIC number from a birthday?
No. Multiple people share the same birth date, and each gets a unique serial number. You cannot determine a specific NIC number from a birthday alone.

### How to convert old NIC to new NIC format?
Prepend "19" to the 2-digit year, keep the 3-digit day code, insert a "0" before the serial number, and remove the V/X suffix. Example: `852140123V` → `198521400123`.

### Can I check ID number details or find an NIC number by name?
This tool decodes details from an NIC number you already have — enter any old (9-digit + V/X) or new (12-digit) Sri Lankan ID number to instantly see the birthday, age, and gender encoded in it. It cannot search for an NIC number using a person's name, as that data is held only by the Department for Registration of Persons.

### How can I check Sri Lanka ID card details online?
Visit [nicinfo.vercel.app](https://nicinfo.vercel.app/) and enter any Sri Lankan NIC number (old or new format). The tool runs entirely in your browser and instantly shows the date of birth, gender, and precise age encoded in the NIC number — no registration or downloads required.

### How do I convert an ID number or NIC to a birthday (DOB)?
Paste your Sri Lankan NIC number into the decoder at [nicinfo.vercel.app](https://nicinfo.vercel.app/). The tool reads the 3-digit day-of-year code embedded in every NIC — whether it's an old 9-digit card or a new 12-digit card — and converts it to an exact birth date (day, month, year) instantly.

### Why is 500 added to the day number for female Sri Lankan NICs?
The Department for Registration of Persons (DRP) uses a 500-day offset as an elegant single-field encoding scheme. A 3-digit number (001 to 366) represents male births directly. Adding 500 produces numbers 501 to 866 for females. This ensures male and female day-code ranges never overlap, enabling instant gender detection and date recovery without requiring an extra character column.

### What is the check digit formula on 12-digit Sri Lankan NICs?
The 12th digit in the modern NIC format is a mathematical check digit computed using a weighted checksum algorithm (modulo 11 arithmetic) across the preceding 11 digits. This replaces the legacy V/X letter suffix with an automated verification check against transcription errors.

### Day Counting and Leap Year Convention
The Sri Lankan NIC day numbering uses a standard 366-day calendar where March 1 is day 61. In non-leap years, day 60 (February 29) is skipped, so day 61 still corresponds to March 1.

## Data Source

NIC format specifications are based on the official numbering scheme defined by the [Department for Registration of Persons (DRP)](https://www.drp.gov.lk) of Sri Lanka.

## About

Developed by [Pubudu Tharanga](https://pubudu-tharanga.vercel.app), Software Developer based in Sri Lanka.

## Disclaimer

This tool is for informational and educational purposes only. It is not affiliated with, endorsed by, or connected to the Department for Registration of Persons or any other Sri Lankan government body. For official documents and services, please contact the [DRP](https://www.drp.gov.lk).

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**Website**: [nicinfo.vercel.app](https://nicinfo.vercel.app/)
**Developer**: [pubudu-tharanga.vercel.app](https://pubudu-tharanga.vercel.app)
**Source Code**: [github.com/pubudutharanga/NIC-Info](https://github.com/pubudutharanga/NIC-Info)

**Last Updated**: August 2026