Universal Unit Converter
Convert between units across length, weight, volume, temperature, and more.
What is Unit Converter?
A single-pane unit converter covering the most common physical quantities, each with its own unit list and precise conversion factors.
How it works
Every unit is defined relative to a base unit per category, so conversion is always value × (from factor ÷ to factor), with temperature handled by its own formulas.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Mixed unit conversions
Convert 3.5 miles to kilometers, 250 grams to ounces, and 2 liters to cups in one place — with results formatted to a sensible precision.
Common mistakes
Imperial vs metric confusion
Fluid ounces and weight ounces are different units. The converter labels each category so you convert volume to volume and mass to mass.
Frequently asked questions
Which unit families are supported?
Length, mass, volume, temperature, area, speed, energy, power, data size, and more — each with both metric and imperial options.
How accurate are the results?
Conversions use exact conversion factors where defined and round only at display time to the precision you choose.
Does it convert between any two units in a family?
Yes — pick any source and target unit within a family and the conversion works in both directions.