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CALCURON Fast, focused online tools.
No Accounts • No Tracking • Zero Data Stored

Calcuron – Analytics Made Simple

A growing collection of fast, privacy-first calculators, generators and converters. No accounts, no stored data, and no background tracking — everything runs directly in your browser.

⚡ Fast, Static Tools 🛡 No Tracking, No Stored Personal Data 📱 Optimized for Mobile
Browse calculators About Calcuron

What you can do here

Use Calcuron for quick everyday calculations:

  • Calculate your age in years, months, and days
  • Estimate BMI using feet, inches, and pounds
  • Plan loans and monthly payments
  • Convert units, compute tips, and generate passwords
  • Estimate your Mortgage Loan Pre-Approval amount
  • Estimate your Tax Withholdings
  • Calculate your Return on Investment
  • Convert cooking measurements
  • Create a weekly & yearly budget planner
  • Calculate sleep, water intake, calorie burn, and Heart Rate Zone

Core tools

Instant calculations right on the homepage. Open full pages for extended versions.

🧮 Basic Calculator

Quick four-function calculator for everyday arithmetic.

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You can also use your keyboard: digits, +, −, ×, ÷, Enter, Backspace, and Esc.

🎂 Age Calculator

Type your date of birth to see your exact age in years, months, and days.

Type your birth date — slashes will auto-fill (e.g., 04/15/1990).
Enter your birth date and tap “Calculate Age”.
Open full Age Calculator ↗

⚖️ BMI Calculator

Estimate your Body Mass Index using height in feet/inches and weight in pounds.

Enter height in feet and inches (e.g., 5 ft 9 in).
Enter your height and weight, then tap “Calculate BMI”.
Open full BMI Calculator ↗

🏦 Loan Calculator

Estimate your monthly payment, total paid, and total interest for a fixed-rate loan.

Enter loan details and tap “Calculate Payment”.
Open full Loan Calculator ↗

📏 Unit Converter

Convert length, weight, and temperature using a compact, fast converter.

Choose a category, units, and value to convert.
Open full Unit Converter ↗

🔐 Password Generator

Create strong random passwords generated entirely in your browser.




Choose options and tap “Generate Password”.
Open full Password Generator ↗

📈 Compound Interest

Estimate future value with compound interest and optional monthly contributions.

Optional — leave at 0 for no additional contributions.
Enter your starting balance, contributions, rate, and years.
Open full Compound Interest Calculator ↗

📜 A Short History of the Calculator

Long before phones and laptops, people were already building tools to make numbers easier to handle. The story of the calculator stretches from wooden beads all the way to sites like Calcuron.

  • Ancient beginnings – Devices like the abacus were used as far back as ~2000 BCE to help merchants and officials add, subtract, and keep track of trade.
  • Mechanical age – In 1642, Blaise Pascal built the Pascaline, a geared machine that could add and subtract. Two centuries later, Thomas de Colmar’s arithmometer became the first commercially successful office calculator.
  • Electronics & pocket calculators – In the 1960s and 1970s, electronic calculators shrank from desk-sized machines to pocket-sized devices, thanks to integrated circuits and early microprocessors. By the late 1970s, simple pocket calculators were cheap enough for schools and everyday use.
  • From hardware to the browser – Today, modern calculators live in phones, operating systems, and the web. Calcuron continues that evolution with focused, browser-based tools that stay on your device while doing the same core job: turning real-world questions into clear, reliable numbers.

Further reading: Calculator (Wikipedia)

All Other Tools & Calculators ↗