Age Calculator
Result
The age in years, months and days is counted the way a birthday is, not by dividing the total days. Change the second date to see an age at any point in the past or future.
History for this tool
The most recent data you entered in this tool, stored only in this browser.
Save what you type here, in this browser? Your work would go into this browser's local storage, so a refresh or a trip to another tool does not wipe it. You also get a short list of previous entries under the form, each one restorable with a click. Nothing is ever uploaded, and there is no account.
Being straight about the trade-off: anything kept there can be read by anyone who can use this browser profile, and by any script that later runs on this site. A tool page can hold a private key, a password or a signed token. Saving is convenient; it is not private.
About this tool
Work out an age the way a birthday works: whole years, then whole months, then the leftover days. Alongside that it shows the totals in days, weeks, months and hours, the weekday someone was born on, and how long until the next birthday. Move the second date to see an age at any point.
Questions
- Why not just divide the total days by 365?
- Because a year is not 365 days on average and months have different lengths. Counting whole years, then months, then days is how people read an age, and it stays correct across leap years.
- Which date is the second field for?
- It is the date you are measuring the age at. It defaults to today, but you can set it to a past date for a record or a future date to see how old someone will be.
- How is the next birthday counted?
- The page takes the birth month and day in the current year, or the next one if that has already passed this year, and counts the days between. A birthday today shows as today.