Date & Time
Date and time calculators
All tools in this category (10)
Date Difference Calculator
Calculate the exact number of days, working days, weeks, months and hours between two dates. Free date difference calculator for deadlines, contracts, planning, HR and personal use.
Age Calculator
Calculate your exact age in years, months and days from your date of birth. Also see total days lived and how many days remain until your next birthday.
Add / Subtract Days from a Date
Add or subtract days, weeks, months or years from any date and instantly get the resulting date. Useful for deadlines, renewals, planning, billing cycles and scheduling.
Time Duration Calculator
Calculate the duration between two times in hours and minutes. Works across midnight. Get total hours, minutes, and seconds instantly.
Business Days Calculator
Add or subtract business days and choose your weekend pattern automatically. Useful for deadlines, deliveries, project schedules and contract timelines.
Business Days Between Dates Calculator
Count business days between two dates and choose your weekend pattern. Useful for delivery times, deadlines, projects and planning.
Days Until Date Calculator
Calculate how many days remain until a future date, plus the equivalent in weeks and approximate months. Useful for countdowns, deadlines, birthdays, trips, exams, events and planning.
Leap Year Calculator
Check whether a year is a leap year and see the number of days in the year and in February. Useful for calendars, payroll periods, planning and date validation.
Days in Month Calculator
Find how many days are in any month and see the first and last day of that month. Useful for payroll, scheduling, billing cycles, rent periods and date planning.
Week Number Calculator
Find the ISO week number for any date and see the start and end dates of that week. Useful for project planning, payroll calendars, logistics, administration and reporting.
Calculate date differences, age, deadlines and working days. Free date calculators for everyone.
Date and time calculators for deadlines and planning
This section helps users calculate date differences, count business days, estimate age and work out future deadlines more easily.
These tools are useful for planning, administration, project timelines and everyday date questions that are tedious to calculate manually.
Full calculator list
- Date Difference Calculator
- Age Calculator
- Add / Subtract Days from a Date
- Time Duration Calculator
- Business Days Calculator
- Business Days Between Dates Calculator
- Days Until Date Calculator
- Leap Year Calculator
- Days in Month Calculator
- Week Number Calculator
Date calculator FAQ
Which date calculations can I do here?
You can compare two dates, count days until a deadline, estimate age, add days and calculate business days.
Are weekends handled in business day tools?
Yes. The business day calculators can account for different weekend patterns, including Friday-Saturday schedules.