Time & Date Calculators
Date math is easy to get wrong by hand, because months have different lengths and leap years add a day. These time and date calculators handle those edge cases for you: your exact age in years, months, and days, a pregnancy due date from your last period, conception, or IVF transfer, the number of days between any two dates, and the date a set number of days before or after another.
The Age Calculator also converts human years to dog years and finds your US Social Security full retirement age from your birth year. All of the calculations run in your browser, and every result can be shared as a link.
- Age Calculator
Calculate your exact age, convert dog years, or find your retirement age.
- Due Date Calculator
Estimate your due date, conception date, and how far along you are.
- Date Calculator
Count days, weeks and business days between dates, or add and subtract days, months and years.
- Hours Calculator
Add up hours worked, overnight shifts and breaks, or total a weekly time card with overtime pay.