What this calculator does
This online tool counts down the exact number of days until your next birthday, and shows the date and the age you'll turn — a quick way to satisfy curiosity or plan a celebration.
Worked example
Born on November 20, 1990 and checking on September 2, 2026: your next birthday is November 20, 2026, which is 79 days away, and you'll turn 36.
Common mistakes
- Forgetting a birthday that already passed this year. If your birthday already happened this year, the countdown correctly points to next year's date instead.
- Leap-day birthdays. If you were born on February 29, your birthday is usually observed on February 28 in non-leap years.
- Confusing "days until" with total age. This calculator only counts down to the next birthday — use the age calculator for your full current age breakdown.