Birthday Calculator
Enter your birthdate to see your exact age in every unit imaginable, plus your next birthday countdown and zodiac sign.
How Old Are You Exactly?
Most people know their age in years, but this calculator breaks it down to the exact day, hour, minute, and second. A 30-year-old has been alive for roughly 10,950 days, 262,800 hours, and over 946 million seconds. The live seconds counter updates in real time so you can watch your life tick by.
Fun Birthday Facts
Your heart beats about 100,000 times per day, or roughly 37 million times per year. By age 30, your heart has beaten over 1.1 billion times. You have taken about 22,000 breaths per day since birth, totaling over 240 million breaths by age 30. Every second you are alive, your body is performing an incredible number of chemical reactions.
How is the exact age calculated?
The calculator counts the full years, remaining months, and remaining days between your birthdate and today. It accounts for varying month lengths and leap years. The hours, minutes, and seconds are based on the total milliseconds between the two dates.
When is my 1 billion second birthday?
You turn 1 billion seconds old at approximately 31 years and 251 days. That is about 31 years, 8 months, and 8 days. Check the milestones section to see when yours is.
What day of the week was I born?
Enter your birthdate and the calculator will tell you. There is an old rhyme: "Monday's child is fair of face, Tuesday's child is full of grace, Wednesday's child is full of woe, Thursday's child has far to go, Friday's child is loving and giving, Saturday's child works hard for a living, and the child born on the Sabbath day is bonny and blithe and good and gay."