Date & Time Calculator
Date & Time Calculator
6 date and time tools — age calculator, days between dates, add/subtract days, working days, time zones and countdown timer. All free and instant.
6
Tools
Live
Clock
00:00:00
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Age Calculator
Enter date of birth
Days Between Two Dates
Select both dates
Add / Subtract Days from Date
Select a start date
Working Days Calculator
Select both dates
Time Zone Converter
Select date and time zone
Countdown to a Date
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Days
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Hours
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Minutes
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Seconds
Set a target date to start countdown
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Educational use only. All tools and course content on SmartUtilz are for informational and study purposes. Results must be independently verified by a qualified engineer before use in any design or safety-critical application. Read full disclaimer →
How to Use the Date & Time Calculator
This toolkit handles everything date-related: calculate your exact age, find the difference between two dates, add or subtract days from any date, or count down to an upcoming event.
Common Use Cases
- Age Calculation: Enter your date of birth to get your exact age in years, months, and days.
- Project Deadlines: Add 90 days to today's date to find a Q3 deadline automatically.
- Days Between Dates: Calculate how many working days remain until a contract end date.
- Countdown Timer: Find how many days until a birthday, exam, or product launch.
- Time Zone Conversion: Convert a meeting time across different global time zones instantly.
All calculations run locally in your browser — no data is sent to any server. Results update instantly as you type.