Birthday Countdown

A birthday countdown calculates the exact number of days, hours, and minutes until your next birthday. If your birthday has already passed this year, it counts to next year\

The calculator uses the standard published formula for birthday countdown. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The calculator applies the standard formula for this type of calculation. See the 'How It Works' steps above for the detailed formula breakdown.