Age & Date Duration Calculator
Enter your Date of Birth to calculate your exact chronological age down to years, months, weeks, days, hours, and minutes—or switch to the Date Duration tab to find the exact number of calendar days, weeks, and working days between any two dates.
| Time Unit | Calendar Rule / Conversion Factor | Practical Use Case |
|---|---|---|
| Years, Months & Days | Exact calendar month lengths (28/29 days in Feb, 30 or 31 days per month) respecting leap years (divisible by 4, except centuries not divisible by 400). | Official KYC verification, insurance eligibility, passport/exam age cutoffs, and employee onboarding records. |
| Total Weeks & Days | $ ext{Total Weeks} = \lfloor ext{Total Days} \div 7 floor$, with remainder $ ext{Total Days} mod 7$. | Sprint planning, 30-day sales follow-up cycles, and pregnancy/medical milestone tracking. |
| Working Days (Mon–Fri) | Counts Monday through Friday while excluding Saturdays and Sundays across the date span. | B2B lead SLA tracking, invoice payment terms, and project delivery timelines. |
Explore All Free KroLead Calculators & Utility Tools
Estimate lump-sum and recurring investment compounding returns with annual schedules in ₹ INR and $ USD.
Time & Schedule Age & Date Duration Calculator ↗Calculate exact chronological age down to years, months, weeks, and days, or count business days between two dates.
Everyday Metrics All-in-One Unit Converter ↗Switch smoothly between Length (meters to feet), Weight (kg to lbs), and Data Storage (MB to GB / TB).
Writing & Outreach Word & Character Counter ↗Count words, characters, sentences, reading/speaking time, keyword density, and WhatsApp/SMS limits.
Frequently Asked Questions
How does the Age Calculator compute exact months and days across leap years?
The calculator uses exact Gregorian calendar month lengths (28 or 29 days for February in leap years, and 30 or 31 days for other months) from your Date of Birth to the target date, plus exact millisecond-to-day conversion for total weeks, days, and hours.
Can I calculate both total calendar days and Monday–Friday working days between two dates?
Yes. Switch to the 'Duration Between Two Dates' tab to view exact Years/Months/Days, Total Calendar Days, Total Weeks, Working Days (Monday–Friday), and Weekend Days, with an option to include the end date (+1 day).