Unit Converter
Convert measurements by category, swap source and destination units and compare all supported units in a table.
Browser-based · No signup · Transparent assumptions
- 01Enter your values
- 02Adjust your settings
- 03Review your results
| Unit | Symbol | Value |
|---|
Showing all units in the current category converted from your input value.
Precision affects display only. US and imperial volume units are distinct; select the correct convention.
Calculations run in this browser. Shared URLs can contain input values. Review links before sharing financial, dietary or birth-date information.
When to use this calculator
Convert a measurement for a recipe, document or technical calculation and compare related units in the conversion table. Check the unit labels and rounding, particularly for US/imperial volume, decimal/binary data or reciprocal fuel economy.
Review the worked example and assumptions below, then use the supported report or copy controls to keep the result with its inputs. Calculations run in this browser; a shared URL can include the values you entered.
How to use Unit Converter
- Choose the measurement category and source and destination units.
- Enter a finite value and choose display precision.
- Review the conversion and table; swap directions or copy the result.
Linear, temperature and reciprocal conversions
Linear conversions multiply by the source factor and divide by the destination factor. Temperature conversion includes an offset. Fuel economy conversions can be reciprocal: liters per 100 km falls as kilometers per liter rises. US and imperial gallons are separate units.
Worked example
1 inch = 2.54 cm
0 °C = 32 °F = 273.15 K
5 L/100 km = 20 km/LAssumptions and limits
Floating-point results with selected display rounding. Temperatures below absolute zero and nonpositive fuel-economy values are rejected. Binary data units and decimal data units differ; read the unit labels. This is not a currency converter or a calibration certificate.
Reference: NIST: SI units and conversion factors. Model/source review: 19 October 2026. See the tool-specific scope and precision limits above.
Frequently asked questions
Are US and UK gallons interchangeable?
No. The imperial gallon is larger. Choose the explicitly labeled gallon or MPG unit.
Why is zero fuel economy rejected?
Reciprocal units require division by the value. Nonpositive values cannot give a finite, physically useful comparison across the table.
Does display precision change the conversion?
It changes the displayed rounding; calculations use the underlying floating-point value.
A practical input scenario
Select the source and destination units explicitly and inspect the labels before copying a result into another document.
Read the scope alongside the result
Display rounding differs from underlying arithmetic. This is not a currency conversion service or a calibration certificate.