Unit Converter Online - Length Weight Temperature

Convert between measurement units. Fast, secure, and completely free. All processing happens in your browser — no data is sent to any server.

What is a Unit Converter?

A Unit Converter translates a measurement between different units within the same category — length (meters, feet, inches), weight (kilograms, pounds), temperature (Celsius, Fahrenheit, Kelvin), data storage (megabytes, gibibytes), and more — applying the correct conversion formula for each pair, which for some categories (like temperature) isn't a simple multiplication but requires an offset as well.

How to Use Unit Converter

  1. Select the category of measurement you're converting (length, weight, temperature, data, etc.)
  2. Enter the value and select the source unit
  3. Choose the target unit to see the converted result instantly
  4. Switch categories or units freely to compare multiple conversions
  5. Copy the converted value for use in documentation, code, or a spec

Key Features

Why Use Unit Converter?

Working across systems, teams, or countries that don't share the same measurement convention — a US-based spec in inches and pounds, a European dataset in centimeters and kilograms, a server's storage reported in binary GiB versus a billing invoice in decimal GB — creates constant small friction, and getting a conversion wrong (especially the genuinely confusing binary-vs-decimal data storage distinction) can lead to real mistakes in capacity planning or measurements.

Common Use Cases

Frequently Asked Questions

Why does my hard drive show less storage than advertised?

Drive manufacturers typically advertise capacity using decimal units (1 GB = 1,000,000,000 bytes), while operating systems often report storage using binary units (1 GiB = 1,073,741,824 bytes) — the same physical drive shows a smaller number under the binary convention, which explains the discrepancy without any data actually missing.

Why isn't temperature conversion just a simple multiplication like other units?

Celsius and Fahrenheit use different zero points as well as different scale sizes, so converting between them requires both a multiplication and an addition/subtraction (like °F = °C × 9/5 + 32), unlike length or weight conversions which are pure ratios.

What's the difference between a US gallon and an imperial (UK) gallon?

They're different sizes entirely — a US gallon is about 3.785 liters, while an imperial gallon is about 4.546 liters — so always confirm which gallon standard applies before relying on a volume conversion for something like fuel efficiency figures.

Can I convert between metric and US customary units for cooking measurements?

Yes, common cooking-relevant units like cups, tablespoons, milliliters, and grams are supported alongside the more general measurement categories.

Is the conversion precise enough for engineering or scientific work?

Standard conversion factors are used with full floating-point precision, though for safety-critical or regulatory work, always cross-reference with an authoritative source for the exact conversion factor required in your specific field.

Guides

Related Tools