Date Difference Calculator
Count days, weeks, months, and years between two dates.
Widget gallery
Free calculator widgets for your website
Browse every free Calcadian calculator widget you can embed on your site — date difference, working days, time card, age and more. Copy the iframe, keep the small attribution link.
All embeddable calculators
Add or Subtract Days Calculator
Find a future or past date by adding or subtracting time.
Business Days Calculator
Count working days between two dates, excluding weekends.
Age Calculator
Calculate exact age from any date of birth.
Time Duration Calculator
Calculate hours and minutes between two times.
Weekly Time Card Calculator
Add up a full week of shifts with breaks and overtime.
Week Number Calculator
Find the ISO week number for any date.
Days Until Calculator
Count how many days are left until any future date.
Weeks Between Dates Calculator
Calculate total weeks, remaining days, and decimal weeks between two dates.
Day of the Week Calculator
Find what day of the week any date falls on.
Unix Timestamp Converter
Convert between Unix epoch time and readable dates.
Who uses these
HR and payroll teams, school and university calendar pages, project management blogs, and internal intranets.
What it costs
Nothing. No account, no API key, no tracking pixels injected into your page — just an iframe and a small credit link.
How to credit us
Keep the attribution line under the iframe: the calculator name plus a link to Calcadian. That is the whole licence.
Used a Calcadian widget?
Tell us where it lives and we'll feature the page in this gallery. Send us the link.