Classic Unit Converter
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About Unit Converter OS

Fast, accurate, and easy to use. Just like 1995.

About the Creator

Classic Unit Converter was created by Jacob Langvad Nilsson, a developer focused on building intuitive and reliable web applications. With a passion for combining retro aesthetics with modern functionality, Jacob developed this tool to make unit conversions both accurate and enjoyable.

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What is Unit Converter OS?

Unit Converter OS is a comprehensive unit conversion tool designed with a retro aesthetic but powered by modern technology. It provides accurate conversions across a wide range of measurement categories, from common everyday units to specialized scientific measurements.

Features

Core Features

  • Real-time unit conversion
  • Built-in calculator
  • Conversion history tracking
  • Copy results to clipboard
  • Multiple category filters

Unit Categories

  • Common measurements
  • Engineering units
  • Scientific measurements
  • Specialized conversions

Technical Details

Conversion Precision

Our conversion engine uses IEEE 754 double-precision floating-point format, providing accuracy up to 15-17 decimal digits. All conversion factors are stored with maximum available precision to ensure accurate results.

Interactive Example

Try this live meter to feet conversion:

Meters

=

Feet

Implementation Details

  • Built with React and TypeScript for type safety
  • Modular architecture for easy extension
  • Efficient conversion algorithms
  • Local storage for conversion history
  • Responsive design using Tailwind CSS

Understanding Unit Systems

Metric System (SI)

The International System of Units (SI) is the modern form of the metric system. It is the most widely used system of measurement globally, providing a standardized way to measure physical quantities.

Imperial/US System

The Imperial and US customary systems are traditionally used in the United States and a few other countries. These systems have historical roots but are still commonly used in everyday measurements.

Accuracy & Standards

Our conversion factors are based on internationally recognized standards and are regularly updated to ensure accuracy. We follow the guidelines set by:

  • International Bureau of Weights and Measures (BIPM)
  • National Institute of Standards and Technology (NIST)
  • International Organization for Standardization (ISO)

Frequently Asked Questions

How accurate are the conversions?

Our conversions use precise conversion factors from international standards organizations, providing accuracy up to 8 decimal places for most conversions.

Can I use the calculator for complex calculations?

Yes! The built-in calculator supports basic arithmetic operations and can be used alongside conversions.

Why does it look like an old operating system?

The retro design is intentional, paying homage to classic operating systems while providing modern functionality and accuracy.

Are the conversion formulas available offline?

Yes, all basic conversion formulas are built into the application and work without an internet connection.

How do I report an incorrect conversion?

You can report any issues through our GitHub repository or contact us directly through the Help page.

    Universal Unit Converter

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    Popular Conversions

    • Meters to Feet
    • Celsius to Fahrenheit
    • Kilograms to Pounds
    • Kilometers to Miles

    © 2025 Classic Unit Converter v3.3 - Made with in Copenhagen, Denmark

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