Date & Time Calculators
Calcadian
date & time calculator hub.
Twelve focused calculators, each on its own page. Pick your question below and get the answer instantly, no clutter, no account.
What is Calcadian?
Calcadian is a free hub of twelve date and time calculators, each with its own dedicated page. Use how many days between two dates, what date is 30 days from today, how many working days between two dates, how many hours did I work this week, or how old am I exactly.
Popular calculators
The tools people reach for most.
Date Difference Calculator
Count days, weeks, months, and years between two dates.
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.
Date calculators
Date Difference Calculator
Count days, weeks, months, and years between two dates.
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.
Week Number Calculator
Find the ISO week number for any date.
Days Until Calculator
Count how many days are left until any future date.
Time Since Calculator
See how long ago a past date was, in years, months, and days.
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.
Time calculators
Instant answers
Pre-calculated pages that answer one question straight away, updated every day.
Why use Calcadian?
Fast
Lightweight pages and instant results, no loading spinners.
Clean
No clutter, no popups, no distractions. Just the math you need.
Private
Calculations run in your browser. Your dates stay with you.
Mobile-first
Designed for thumbs and small screens before desktop.
Find the page that answers your question
Calcadian keeps one question per page, so you land straight on the answer instead of a wall of options. Pick the closest match:
- How many days between two dates for trips, contracts, anniversaries.
- What date is 30 days from today to add or subtract days, weeks, months, or years.
- How many working days between two dates, with weekends and your own holidays excluded.
- How old am I exactly in years, months, and days from any date of birth.
- How many hours between two times for shifts, meetings, and travel legs.
- How many hours did I work this week across seven days of shifts, breaks, and overtime.
- What week number is this date using ISO 8601 weeks for sprints and payroll.
- What day of the week was this date for any past or future date.
- How many days until a date to count down to a deadline or event.
- Convert a Unix timestamp to a date, from epoch seconds to local time and UTC.
- How many weeks between two dates, in whole weeks plus remaining days.
- How long ago was a date, with years, months, and days elapsed since any past date.
Why Calcadian is built this way
Most calendar tools bury one answer inside a page of unrelated calculators, ads, and popups. Calcadian gives each question its own fast, focused page: a single input area, the answer above the fold, and a short explanation of how it was worked out. Every calculation runs in your browser, nothing you type is sent to a server, and no account is required.
New to it? Start with the full calculator directory, or read the Calcadian blog for worked examples.
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