Date & Time Tools
Free online date and time calculation utilities. Calculate ages, date differences, business days, convert timestamps, and work with timezones—all in your browser.
Age Calculator
Calculate age from birthdate with precision
PopularDays Between Dates
Calculate days, weeks, months between two dates
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates
Why Use Date & Time Calculators?
Date and time calculations are essential for project planning, age verification, scheduling, and data analysis. These tools eliminate manual counting errors and handle complex scenarios like leap years, timezones, and business days automatically.
Common Use Cases
📊 Project Management
Calculate project durations, estimate delivery dates, count business days for deadlines, and plan sprints with accurate date calculations.
💼 HR & Administration
Calculate employee ages, tenure, vacation days, notice periods, and retirement dates with precision for HR processes and compliance.
💻 Software Development
Convert Unix timestamps for debugging, handle timezone conversions for global applications, and calculate date differences for features and analytics.
📅 Personal Planning
Calculate ages for birthday planning, count days until events, plan travel across timezones, and track important milestones and anniversaries.
Frequently Asked Questions
Are these date calculators accurate?
Yes, all calculations account for leap years, varying month lengths, and timezone differences. Results are precise to the day, hour, minute, and second depending on the tool.
Do business day calculators include holidays?
The business days calculator excludes weekends by default. For country-specific holidays, you may need to manually adjust the result based on your local holiday calendar.
What is a Unix timestamp?
A Unix timestamp is the number of seconds since January 1, 1970 (UTC). It's commonly used in programming and databases to store dates in a universal, timezone-independent format.
Can I calculate dates in the past and future?
Yes, all tools work with both historical and future dates. You can calculate differences between any two dates, regardless of how far apart they are.