What converts to what
A converter only helps if it speaks both your starting and ending units, so it pays to match the tool to the exact pair you have in front of you. One converter here is broad and the others are deliberately specialised:
- General measurements — the unit converter handles length, weight, volume, area, and speed across metric and imperial, which covers most everyday "how many X in a Y" questions.
- Temperature scales — when you need Celsius, Fahrenheit, Kelvin, or Rankine, the dedicated temperature converter shows every scale at once instead of one pair at a time.
- Money and specialist formats — the currency converter uses live rates, while the color converter (HEX, RGB, HSL, CMYK) and Roman numeral converter handle notation that general tools never touch.
If you are unsure, start with the unit converter and switch to a specialist only when it cannot represent your value.