📅 Date Calculator — Add Days, Date Diff & Age
Add or subtract days from any date, calculate the difference between two dates, and compute age from a birthdate. Three calculators in one free online date tool.
How to Use
Choose a calculator tab
Select Add/Subtract to offset a date, Date Difference to find the gap between two dates, or Age to compute exact age from a birthdate.
Enter your dates
Use the native date picker or type in YYYY-MM-DD format. All calculations update instantly as you change the inputs.
Read the result
Results show in multiple units simultaneously — days, weeks, months, and years — so you can use whichever suits your needs.
Frequently Asked Questions
संपूर्ण गाइड: Date Calculator
Date Calculator क्या है?
Date Calculator dates के बीच difference calculate करता है, future/past dates find करता है, और business days count करता है। Project deadlines, age calculations, subscription expiry, contract durations — सभी date arithmetic involve करते हैं जो manually error-prone होती है।
यह tool leap years, month lengths, timezone differences, और public holidays consider करता है accurate calculations के लिए।
कैसे उपयोग करें
- Calculation type select करें: difference, add/subtract, या business days।
- Start date enter करें।
- End date या duration enter करें।
- Calculate click करें।
Pro Tips
- Business days calculation weekends automatically exclude करती है।
- Relative dates use करें: "30 days from today", "3 months ago"।
- International projects के लिए timezone-aware calculations करें।