# Birthday Calculator

> Find your next birthday, the weekday it falls on, and how many days are left, plus your current age, decimal age, next ten birthdays, and half birthday.

**URL:** https://www.calculatoranswers.com/birthday-calculator
**Category:** Everyday Life

## Quick Answer

Enter your date of birth to find your next birthday, days remaining, the age you will turn, your current calendar age, and your decimal age.

## Definition

A birthday calculator finds the next anniversary of a date of birth and counts the calendar days remaining until it. It also reports the age reached on that date, the current completed age, and the decimal age, which is the completed years plus the share of the current birthday year that has already passed. Anniversaries of 29 February are clamped to 28 February in a common year, the same convention the age calculator uses.

## How to Use

1. **Enter your date of birth** — Type or pick the day, month and year you were born. Impossible dates such as 30 February are rejected rather than shifted to another day.
2. **Check the reference date** — Calculate as of defaults to today and can be changed to any date on or after the date of birth.
3. **Read your next birthday** — The result gives the date and weekday of your next birthday, the days remaining, the age you will turn, your current age, your decimal age, and how far you are through your birthday year.
4. **Look further ahead** — A table lists your next ten birthdays with weekdays. Separate fields give your birthday in a chosen year and the date you turn a chosen age.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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