Free Age, Date & Birthday Calculators — Fast, Accurate, Trusted by Professionals
Get an exact chronological age in years, months and days — instantly, with no sign-up, and formatted the way SLPs, psychologists and teachers actually need it.
Popular Calculators
Mark calculators as "Popular" from the page editor to feature them here.
Built for SLPs, psychologists & educators
Get chronological age in the years;months notation used by Pearson, Brigance and CELF-5 manuals, plus a printable, clinically formatted report you can drop straight into documentation.
See the professional guide →Frequently Asked Questions
Is this calculator accurate?
Yes — calculations use exact calendar math down to the day, accounting for leap years automatically.
Do you store my birth date?
No. All calculations run in your browser; nothing is sent to or saved on our servers.
Is this free?
Every calculator on this site is completely free, with no sign-up required.
Can I use this for official documents?
These tools are for informational and professional-reference use; always verify against official records for legal purposes.