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Unit Converter

Convert between units of length, weight, temperature, area, volume, speed, data, and time —instantly.

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All conversions 1 unit = —

What is a Unit Converter?

A unit converter turns a measurement in one unit into equivalent values in other units from the same category. It is useful for everyday conversions across metric, imperial, temperature, speed, area, volume, and data storage systems.

How to Use the Unit Converter

  1. Pick a category such as length, temperature, speed, or data storage.
  2. Type a value into any one of the available unit fields.
  3. Read the converted values in the rest of the fields instantly.
  4. Copy the number you need for travel, reports, recipes, or engineering work.

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Understand Unit Conversion (examples, use cases & FAQs) ▾
Example
Input Temperature: 100°F →37.78°C / 310.93 K
Output Length: 5 miles →8.047 km / 26,400 feet
Common Use Cases
  • Convert recipe measurements between metric and imperial (cups →mL, oz →g)
  • Calculate distances when traveling between countries using different systems
  • Convert file sizes between bytes, KB, MB, and GB for storage planning
  • Check temperature for travel or HVAC settings (°F →°C)
  • Convert speed limits from mph to km/h for driving abroad
Why Use This Unit Converter
  • Handles multiple categories in one place instead of switching tools.
  • Updates every related unit at once, which makes comparisons faster.
  • Useful for metric-versus-imperial work, travel, HVAC, cooking, and storage planning.
  • Runs locally in the browser with no uploads or server calls.
Frequently Asked Questions
How accurate are the conversions?

Conversions use standard SI-defined ratios and are accurate to JavaScript's floating-point precision (15—7 significant digits). For most practical purposes, results are exact. Temperature conversions use the official formulas: °C = (°F ∀32) × 5/9, K = °C + 273.15.

What unit categories are supported?

Length, weight/mass, temperature, area, volume, speed, and digital storage. More categories may be added over time.

Can I convert between metric and imperial units?

Yes. All categories include both metric (SI) and imperial/US customary units. For example, the length converter includes meters, centimeters, kilometers, inches, feet, yards, and miles simultaneously.

What does Unit Converter Online —Length, Weight, Temperature & More do?

Unit Converter Online —Length, Weight, Temperature & More runs entirely in your browser and helps you complete this task without uploading data to a server.