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Unit Converter

Unit Converter

Free online unit converter for length, weight, temperature, volume, data size, speed, pressure, and more.

From
To
ft

How to use the unit converter

1

Enter the value you want to translate, whether it is a measurement, temperature, file size, speed, or other unit value.

2

Choose the unit you already have, then switch the target unit to the format used by the label, recipe, route, spec sheet, or assignment.

3

Use the result to compare numbers across categories without jumping between separate calculators.

Useful reference formulas

A general unit converter is built from category-specific relationships. Exact pairs use fixed factors, while temperature pairs also include an offset.

  • Length example: in = cm / 2.54
  • Weight example: lb = kg x 2.2046226218
  • Temperature example: °F = (°C x 9/5) + 32

Common mixed-unit checks

55 cm carry-on width

21.65 in

Useful when a luggage rule is written in inches but the bag label is metric.

2.5 L bottle size

0.66 US gal

Useful when comparing container capacity across metric and US listings.

180°C oven setting

356°F

Useful when adapting a recipe to an oven with Fahrenheit controls.

How to use broad unit results

  • Pick a focused converter when you need a page with deeper notes for a specific pair.
  • Temperature conversions are not simple multiplications because Celsius and Fahrenheit use different zero points.
  • For shipping, engineering, lab, medical, or compliance work, confirm the required precision before submitting a value.

Helpful when a task crosses more than one unit category

One place for mixed unit checks

Use it when your work moves between sizes, weights, temperatures, capacities, speeds, and storage values.

Switch units without losing context

Change the value or unit pair and keep the result in view while you compare nearby numbers.

Built from fixed unit relationships

Best for everyday measurement checks where the source and target units have a standard conversion relationship.

Useful beside labels, notes, and listings

Check a unit value while reading packaging, homework, travel details, product specs, or project notes.

Editorial and accuracy note

Unit Converter combines a working converter with practical guidance on the same page. The page is designed to show the formula, examples, rounding notes, and related tools so visitors can judge whether the result fits a task such as shipping, recipes, logs, design, travel, or automotive planning.

  • Results are calculated in the browser with standard conversion factors for common units.
  • For official forms, engineering tolerances, medical decisions, or compliance work, verify the original measurement and the relevant source rule.
  • The surrounding notes focus on real use cases instead of repeating generic placeholder copy.

More measurement tools

Length ConverterCM to Inches ConverterInches to CM ConverterKilometers to Miles ConverterMiles to Kilometers Converter

Unit converter FAQ

How are the unit conversions calculated?
The converter uses fixed relationships for standard unit pairs, then recalculates the result when you change the value or selected units.
When do people usually use a unit converter?
Usually when shopping, comparing product specs, checking luggage or package limits, following recipes, studying, or reading measurements from another region.
Can I use this unit converter on mobile?
Yes. The page works on phones, tablets, and desktop screens.

Want a focused converter instead?

Browse focused tools for length, weight, temperature, data size, speed, and other common categories.

Browse more tools