How to calculate days between two dates?

Enter your start date and end date in our calculator. It instantly shows the exact number of days, weeks, months, and years between the dates.

How to add days to a date?

Select 'Add to Date' mode, enter your start date and the number of days to add. The calculator shows the resulting future date instantly.

How to calculate age from date of birth?

Enter your birth date as the start date and today's date as the end date. The calculator shows your exact age in years, months, and days.

Date Calculator - Days Between Dates Calculator Free

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Why Choose Our Date Calculator

Looking for the best date calculator 2024? Our comprehensive date calculator provides accurate days between dates, age calculator, and date difference calculator functionality. Whether you're planning projects, calculating ages, or determining future dates, our professional tool delivers instant results with precision.

✅ Complete Date Calculations

• Days Between Dates: Calculate exact duration between any two dates
• Age Calculator: Find precise age in years, months, and days
• Add Days to Date: Determine future dates by adding time periods
• Subtract Days: Calculate past dates by subtracting time periods

🏆 Advanced Features

• Business Days Calculator: Exclude weekends and holidays
• Multiple Time Units: Days, weeks, months, and years
• Instant Results: Real-time calculations as you type
• Gregorian Calendar: Accurate leap year handling

👨‍💼 Project Management

Calculate project timelines, deadline tracking, and milestone planning.

🎂 Personal Events

Age calculations, anniversary countdowns, and special date planning.

💼 Business Operations

Invoice terms, contract durations, and employee tenure calculations.

💡 Pro Tip: Use our date calculator for precise planning - it handles leap years, varying month lengths, and provides both exact days and human-readable time periods.

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Advanced Date Calculator Features

📊 Professional Date Calculations

Calculate Days Between Two Dates

Precise calculation of exact days, weeks, months, and years between any two dates. Perfect for project planning, age determination, and timeline analysis.

Date Calculator Add Subtract Days

Add or subtract days, weeks, months, or years from any date to find future or past dates. Essential for deadline planning and historical calculations.

Business Days Calculator

Calculate working days excluding weekends and holidays. Perfect for project timelines, shipping estimates, and business planning requirements.

📅 Specialized Date Tools

Working Days Calculator

Professional working days calculation for business operations, excluding weekends and customizable holiday schedules for accurate planning.

Age Calculator from Date

Calculate exact age from birth date to any specified date, showing precise years, months, and days for accurate age determination.

Date Difference Calculator Years Months Days

Comprehensive date difference calculation showing results in multiple formats: total days, years/months/days breakdown, and time period summaries.

🎯 Date Calculator with Holidays

Holiday-Aware Calculations:

• Business days excluding federal holidays
• Custom holiday schedule support
• International holiday calendar integration
• Working day calculations for payroll

Professional Applications:

• Project delivery date calculations
• Contract term and renewal dates
• Employee leave and tenure tracking
• Financial settlement timelines

💡 Professional Date Analysis: Our comprehensive date calculator handles all date calculations from simple days between dates to complex business day calculations with holiday considerations. Calculate age from date, determine working days, and perform date arithmetic with professional accuracy for planning and analysis needs.

Popular Date Calculations

👨‍💼 Business & Project Planning

Project Deadlines: Calculate completion dates

Contract Terms: Determine start and end dates

Invoice Due Dates: 30/60/90 day payment terms

Employee Tenure: Years of service calculations

Business Days: Exclude weekends and holidays

🎂 Personal & Life Events

Age Calculation: Exact age in years, months, days

Birthday Countdown: Days until next birthday

Anniversary Dates: Relationship milestones

Vacation Planning: Trip duration and countdown

Retirement Date: Days until retirement

🏥 Health & Legal Applications

Pregnancy Due Date: 40-week gestation period

Medical Timelines: Treatment duration tracking

Legal Deadlines: Court date calculations

Statute of Limitations: Legal time limits

Insurance Terms: Policy expiration dates

Date Calculation Tips & Best Practices

💡 Accuracy Guidelines

Consider Leap Years

Leap years occur every 4 years (except century years not divisible by 400). This affects February calculations and long-term date arithmetic.

Month Length Variations

Months have 28-31 days. Adding "1 month" to January 31st results in February 28th (or 29th in leap years), not March 3rd.

Time Zone Considerations

For international dates, consider time zone differences. Our calculator uses the Gregorian calendar standard for consistency.

📚 Common Use Cases

Project Management

Calculate project duration, milestone dates, and delivery schedules. Use business days for realistic timelines excluding weekends.

Financial Planning

Calculate loan terms, investment periods, and payment schedules. Precise date calculations are crucial for financial accuracy.

Legal and Compliance

Calculate deadline compliance, statute of limitations, and contract terms. Accuracy is essential for legal requirements.

Date Calculator