Age Calculator
Enter your date of birth to calculate your exact age in years, months, and days. Also discover what day of the week you were born and how many days remain until your next birthday.
How to use
Select your date of birth using the date picker. The calculator automatically computes your exact age broken down into years, months, and days. It also tells you which day of the week you were born and calculates how many days are left until your next birthday.
How It Works
The calculator computes the difference between your birth date and today's date, accounting for varying month lengths and leap years. Days until next birthday are calculated by finding your birthday in the current (or next) year and computing the day difference.
When this tool helps
Whether you need your exact age for a legal form, want to celebrate a milestone birthday in days, or are simply curious about the precise breakdown of your years, months, and days on Earth, this age calculator does the calendar math for you. Parents can track infant ages in months and days, travelers can check age rules for visa applications, and anyone can find out what day of the week they were born.
Examples
Example 1: Visa Application
A person born on March 15, 1990 applying for a visa on January 10, 2026 needs to state their exact age. The calculator shows 35 years, 9 months, and 26 days. Total days lived: 13,084. They were born on a Thursday and their next birthday is 64 days away.
Example 2: Baby Age in Months
A parent with a baby born on August 22, 2025 checks the age on April 1, 2026. The calculator shows 0 years, 7 months, and 10 days, the baby is 7 months old. Pediatricians track milestones in months during the first two years, making this calculation useful for well-baby checkups.
Example 3: Milestone Celebration
Someone born on June 1, 1998 wants to know when they turn 10,000 days old. At roughly 27 years and 4.5 months, that milestone falls around October 14, 2025. Many people celebrate quirky milestones like 10,000 days, 1 billion seconds (around age 31.7), or their golden birthday.
Things to watch
- •Make sure to enter the correct year, a common mistake is selecting the current year instead of your birth year in the date picker.
- •Leap year babies (born February 29) technically have a birthday every 4 years, the calculator handles this correctly.
- •Age calculations can differ by one day depending on whether you count the birth date itself, this tool uses the standard method.
- •Some East Asian cultures count age differently, a newborn is considered 1 year old at birth and gains a year each New Year.
- •For legal purposes, always verify age requirements with the specific institution, as some use "age at last birthday" while others use exact dates.
Common questions
- How is exact age calculated?
- Exact age is calculated by finding the difference between your birth date and today in years, months, and days. For example, if you were born on March 15, 2000 and today is March 23, 2026, your exact age is 26 years, 0 months, and 8 days.
- Does the age calculator account for leap years?
- Yes, this calculator fully accounts for leap years when computing exact age and days until the next birthday. Leap years (divisible by 4, except centuries unless divisible by 400) have 366 days instead of 365, which affects date calculations.
- How do I calculate age in months?
- To calculate total age in months, multiply the years by 12 and add the remaining months. For example, 26 years and 3 months equals 315 months. This tool shows the breakdown, making it easy to see months as part of your exact age.
- Why would I need to know my exact age in days?
- Exact age in days is useful for legal documents, visa applications, insurance policies, and medical records that require precise age calculations. Some countries use exact day counts for pension eligibility or retirement age. It is also fun for milestones, for example, your 10,000th day alive typically falls around age 27.
- What day of the week was I born on?
- Enter your birth date in this calculator and it will tell you your birth day of the week. For example, if you were born on July 20, 1969 (the Moon landing), that was a Sunday. Knowing your birth day is a fun conversation starter and is used in some cultural traditions.