The Age Calculator is designed to determine a person’s exact age in years, months, and days. Different cultures calculate age in different ways, but this tool follows the most common and globally recognized method — where your age increases on your birthday each year. For example, if someone has lived for 3 years and 11 months, the Age Calculator will display their age as 3 years old, and it will turn 4 on their next birthday. This system is widely used in most Western countries. However, some regions follow unique traditions for calculating age. In certain cultures, a person’s current year of life is included when counting. For example, someone described as being “in their 21st year” would be considered 20 years old by Western standards. In traditional Chinese culture, a baby is considered 1 year old at birth, and their age increases during the Lunar New Year rather than on their actual birthday. That means a child born one day before the Chinese New Year would already be 2 years old two days later — even though only two days have passed. Sometimes, age calculations involving months and days can be confusing, especially when the dates fall near the end of a month. For instance, from February 20 to March 20 is counted as one month. But if we measure from February 28, 2022, to March 31, 2022, two valid outcomes appear. If we treat February 28 to March 28 as one full month, the Age Calculator result will be 1 month and 3 days. However, if both February 28 and March 31 are treated as month-ends, the result becomes 1 month. Both results are correct, but the variation arises from the unequal number of days in different months. To ensure consistent results, our online Age Calculator uses the first approach — providing accurate, easy-to-understand outcomes every time you calculate your age.
This tool calculates the difference between two dates in years, months, and days. You can choose any start and end date, or simply check “Use Current Date” to find your exact age today.
Yes! Just uncheck “Use Current Date,” then select both start and end dates. The calculator will instantly display the precise duration in years, months, and days.
Absolutely. It uses real-time date and time functions in JavaScript to ensure precision down to the second, giving you the most accurate results possible.
It offers a professional UI, live age counter, copy-to-clipboard function, and dark mode. Plus, it’s fully responsive and works smoothly on all devices.
No. Everything runs locally in your browser. Your dates and results never leave your device, ensuring complete privacy and security.
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