Age Calculator
Find your exact age in years, months, days and total days lived. Also shows your zodiac sign and days until next birthday.
Why Use an Age Calculator?
Calculating your exact age manually is error-prone due to leap years, varying month lengths and time zones. Our free age calculator gives you the precise age in years, months and days instantly — along with your zodiac sign, total days lived and a countdown to your next birthday. It is especially useful for visa applications, government forms, insurance policies, school admissions and medical age verification where exact age matters.
Frequently Asked Questions
How do I calculate my exact age in years months and days? ▼
Enter your date of birth and a reference date (default: today). The calculator subtracts the dates accounting for leap years and varying month lengths, giving you exact years, months and days.
How many days old am I? ▼
Our age calculator shows your total days lived under "Total Days Lived". For example, a person born on 1 January 2000 has lived over 8,000 days by 2024.
How to calculate age from date of birth in Excel? ▼
In Excel use: =DATEDIF(A1,TODAY(),"Y") for years. But our online age calculator is faster and also shows months, days, zodiac sign and birthday countdown without any formula.
What is the age calculator formula? ▼
Age = Reference Date − Date of Birth. The calculation accounts for leap years: if the current day/month has not yet reached the birth day/month in the current year, subtract one year.
Can I calculate someone's age at a specific date in the past or future? ▼
Yes — simply change the "Calculate As Of" date to any past or future date to see what age someone will be at that point in time. Useful for retirement planning and milestone calculations.
Which date format does the age calculator use? ▼
The calculator uses the standard YYYY-MM-DD format internally but displays results in a readable format. It works globally — there is no DD/MM/YYYY vs MM/DD/YYYY confusion.