Unit Converter by Neonway is a free, no-install measurement conversion tool that runs instantly in your browser. It covers 12 conversion categories and more than 100 individual units — from everyday length and weight conversions to specialist categories like fabric weight and fuel economy. Enter a value, choose your source and target units, and the result appears immediately. No account required, no software to install, no data sent anywhere.
12 Conversion Categories
- Length — Mil, Inch, Foot, Yard, Mile, Nautical Mile, Meter, Kilometer, and more.
- Area — Square Inch, Square Foot, Acre, Hectare, Square Kilometer, and more.
- Time — Nanosecond through Century, including Week, Month, Year, and Decade.
- Temperature — Celsius, Fahrenheit, and Kelvin with correct formula conversion.
- Weight — Ounce, Troy Ounce, Pound, Stone, Short Ton, Long Ton, Gram, Kilogram, Metric Ton.
- Volume — Full US and Imperial sets (gallon, quart, pint, cup, fluid ounce, tablespoon, teaspoon) plus metric (liter, milliliter, cubic meter).
- Speed — mph, km/h, m/s, knots, feet per second, and more.
- Power — Watt, Kilowatt, Megawatt, Electric and Metric Horsepower, BTU/min, and more.
- Pressure — Pascal, Bar, Atmosphere, PSI, inHg, mmHg, Torr, and more.
- Energy — Joule, Calorie, Kilocalorie, Watt-hour, kWh, BTU, Electronvolt, and more.
- Fabric — g/m² (GSM) to oz/yd² (OSY) for textile and apparel professionals.
- Fuel Economy — km/L, L/100km, MPG (US), MPG (UK) with correct inverse-formula conversions.
Key Features
- Instant conversion — results update live as you type, with no submit button needed.
- Fraction display — show results as decimal, fraction, or both. Supports denominators up to 128.
- Fraction input — enter values like “3 1/2” or “7/8” directly in the input field.
- Configurable decimal precision — choose 0 to 8 decimal places with a single tap.
- Thousands separator — toggle comma formatting for easier reading of large numbers.
- Scientific notation — auto-switches for very large or very small values.
- Flip units — swap source and target in one click; optionally carry the converted value forward.
- Copy result — one-click copy to clipboard, with or without the unit label.
- Full-screen mode — press F11 or the full-screen button for distraction-free use.
- Dark, light, and system themes — follows your OS setting automatically, or switch manually.
- Keyboard shortcuts — F = flip units, F11 = fullscreen, ⌘, = open settings, Esc = close.
- Settings remembered — your last category, units, and display preferences persist in the browser.
Who It Is For
Unit Converter is built for students working through physics or chemistry problems, engineers and scientists converting between SI and imperial units, cooks and bakers converting recipe measurements, travelers converting distances and temperatures, fitness enthusiasts converting weight and speed, textile and apparel professionals working with fabric weight, and mechanics or motorsport fans converting power and pressure figures.
Free to Use — No Install, No Sign-Up
Unit Converter runs entirely in your browser. There is nothing to download, no account to create, and no personal data required. All conversions happen locally on your device.
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