About Unit Converter

Unit Converter is a free, lightweight web calculator designed for everyday metric and imperial conversions. It supports temperature, length, weight, volume, pressure, speed, and area conversions without requiring a page reload or account signup.

Our Mission

We believe unit conversion should be fast, simple, and easy to verify. The tool keeps calculations on the page, stores recent conversions locally in your browser, and may display Google AdSense advertising to support the site.

How It Works

All calculations run locally in your browser using standard international conversion factors (SI units). Your recent conversion history and dark mode preferences are stored only in your browser's localStorage; conversion values are not submitted to our server.

Key Features

• Dark Mode: Easy on the eyes during nighttime use
• Copy & Share: One-click copying and native sharing
• Conversion History: Access your last 5 conversions
• Accessibility First: WCAG 2.1 compliant with full keyboard navigation
• Offline Ready: Works without internet after initial load
• Clear privacy choices: Local preferences stay in your browser, with advertising disclosures explained in the privacy policy

Supported Conversions

Temperature (Celsius, Fahrenheit, Kelvin) • Length (mm, cm, m, km, inches, feet, yards, miles) • Weight (mg, g, kg, oz, lb, ton) • Volume (ml, l, fl oz, cup, pint, gallon) • Pressure (Pa, kPa, bar, psi, atm) • Speed (m/s, km/h, mph, knots) • Area (mm², cm², m², km², in², ft², acres)

Accuracy

Our converter uses precise international unit definitions and mathematical formulas for accurate results. All conversions are calculated with up to 12 significant figures of precision. However, Unit Converter is provided without warranties and is intended for general informational purposes only. For critical applications (engineering, medicine, legal, financial), please verify conversions independently.