Free & Accurate

Calculate Age with Precision

Chronological age, biological age, pet years, and more. Free calculators built for accuracy.

Calculate your exact age in years, months, weeks, and days.

Calculate chronological age in months for testing and assessments.

Estimate your true biological age based on lifestyle factors.

All Calculators

Calculate age in the format required for Pearson assessments.

Calculate chronological age for Brigance developmental assessments.

Calculate adjusted (corrected) age for premature babies.

Convert your dog's age to human years using modern formulas.

Convert your cat's age to human years.

Convert your age to the Korean age system.

Calculate the exact age difference between two people.

Find out how many days until your next birthday.

Calculate when you can retire and plan for the future.

Get accurate calculations instantly. No waiting, no loading.

All calculations happen in your browser. We never store your data.

No signup, no fees. All calculators are completely free to use.