FPSPOT
Browser calculators for calendar age, decimals, advertising and financial formulas.
Age & dates
Chronological Age Calculator
Find calendar years, months and days on a chosen reference date.
Age Difference Calculator
Compare two birth dates in either order.
Age on a Specific Date Calculator
Work out the age in years, months and days on a date you choose.
Age Calculator by Date of Birth
Enter a date of birth to see the age today and the next birthday countdown.
Pet Age Calculator
Estimate human-equivalent age for cats and medium-sized dogs.
Age Tools
Choose between age gap, calendar age and pet age.