How to convert units
- Search for or select a measurement category.
- Enter a value and choose the source and destination units.
- Copy the result or review all equivalent values below it.
UNIVERSAL CONVERSION TOOL
Convert almost any
measurement instantly.
One focused workspace for everyday and professional conversions—from centimeters and PSI to flow, viscosity, electricity, magnetism and radiation.
80 categoriesInstant resultsPrivate calculations
11UNIT CONVERTER Live
80 converter categories
Length converter
Calculations run locally in your browser. No values are uploaded.
AT A GLANCE
Convert to every unit
Your entered value is shown across the active category.
Private and lightweight. All standard calculations happen on your device. No value, file, account or registration is required.
ONE CONVERTER, MANY DISCIPLINESEveryday simplicity.
Everyday simplicity.
Engineering depth.
Use common conversions for travel, cooking, school and technology, or switch to specialist quantities used in instrumentation, process plants, electrical work, heat transfer, fluids and radiation safety.
- Live results while you type.
- Search by category, name, symbol or unit.
- Swap source and destination units instantly.
- Compare the result across every unit in the category.
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Unit Converter FAQ
Which converter categories are included?
The page contains 80 categories covering common measurements, engineering, heat, fluids, light, electricity, magnetism, radiology and specialist quantities.
Are the conversions suitable for engineering work?
The converter uses recognized SI relationships and exact definitions where available. Always follow your organization’s approved standards, instrument ranges and required rounding for safety-critical calculations.
Why are US and Imperial gallons separate?
They are different units. The converter labels US and Imperial values separately to prevent an incorrect result.
Does the converter work offline?
Once the page and website assets are available in your browser, standard conversion calculations do not require a server request.