CalendarPrime provides free online date, scheduling, and business day calculators. Use the tools below to calculate date differences, add business days, determine project deadlines, and plan schedules more effectively.
Featured Calculators
Business Days Calculator
Calculate a future or past date by adding or subtracting business days.
Workdays Between Dates
Calculate the number of working days between two dates.
Workdays Between Dates Calculator
Date Difference Calculator
Find the exact number of days between two dates.
Add/Subtract Days Calculator
Add or subtract calendar days from any date.
Day of Year Calculator
Determine the numerical day of the year for any date.
Age Calculator
Calculate age in years, months, and days.