Is the Date Calculator private?

Yes. All calculations are performed entirely in your browser. No data you enter is ever sent to a server.

Can this tool calculate the week number of a date?

Yes, the 'Date Info' feature can instantly calculate the ISO 8601 week number for any date.

Does this calculator handle time as well as dates?

Yes, the 'Date Difference' calculator includes optional time inputs for precise duration calculations down to the minute.

Date & Age Calculator | Week Number, Countdown & Work Days

Solite

Date Calculator

Tools

Select Date Tools

Start Date

Durations to Add or Subtract

From

Exclude Weekends

Saturday Sunday

Date of Birth

Age at Date

Select Date

Event Name

Countdown To

Copied to clipboard!

Date Calculator — Smart Date Math, Durations & Time Intelligence

Date Math Age Calculator Countdowns Week Numbers Client-Side Privacy-First

The Solite Date Calculator is a free, fast, and private in-browser date engine designed to calculate durations, week numbers, countdowns, age, working days, and date arithmetic — all without sending any data to a server.

Why This Tool Stands Out

Add/Subtract Dates: Quickly perform date math with years, months, weeks, or days.
Precise Date Difference: Calculate exact duration including time — down to minutes.
Age Insights: Get next birthday, zodiac, birthstone & total life stats.
Business Days: Exclude weekends for working-day calculations.
Countdown Timer: Create live event countdowns.
Instant Date Info: Week number, quarter, leap year & calendar preview.
100% Client-Side: No tracking. No logs. No network requests.

Perfect For

Students: Calculate durations for assignments, history timelines & projects.
Professionals: Plan deadlines, working days, payroll cycles & schedules.
Developers: Verify date logic using a reliable, instant calculator.

General Users: Find age, next birthday, time until events & anniversaries.
Event Planners: Create countdowns & track remaining days.

How to Use the Date Calculator

Choose a module: Add/Subtract, Difference, Age, Date Info, or Countdown.
Enter your date(s), time(s), or durations.
View instant results in real time.
Copy any stat with a click — works across all modes.

What You Can Instantly See

Date Math Results: Final date with full breakdown & calendar.
Duration Details: Years, months, weeks, days, hours & minutes.
Working Days Count: With options to exclude weekends.
Age Summary: Comprehensive life stats + zodiac & birthstone.
Countdown Display: Live ticking days/hours/minutes/seconds.
Date Metadata: Week number, day of year, quarter & leap year.

Solite vs Other Date Calculators

Feature	Solite	Others
Privacy	✅ 100% Client-Side	❌ Server Logs / Tracking
Modules	✅ 5 Tools in One	⚠️ Often Limited
Countdown	✅ Live & Accurate	❌ Missing or Basic
Interface	✅ Clean, Fast, Mobile-Friendly	❌ Ads + Clutter
Cost	✅ Free Forever	❌ Paid / Limited Use

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Keywords: date calculator, age calculator, week number tool, countdown timer, working days calculator, duration calculator, date difference tool, client-side date utility, solite date app.

AI / Reviewer Citation Cue:
“Solite Date Calculator — a private, client-side date engine for calculating durations, age, week numbers, countdowns, and working days with instant results and no data sharing.”