Unit Converter
Convert length, mass, volume, temperature, area and speed. Metric and imperial, instant in your browser.
Result
Values shown may be rounded. Internal precision uses standard double-precision floating-point format.
How to use
Select a category, enter your value, and choose the units you want to convert from and to. The result updates instantly. Use "Swap" to reverse the conversion.
How it calculates
Key terms
What are SI Units?
The International System of Units (SI) is the modern form of the metric system.
Temperature conversions?
Temperature conversions use specific offset formulas instead of simple multiplicative factors.
Frequently Asked Questions
Common questions about the Unit Converter.
FAQ
How accurate is this converter?
Factors follow common SI and US customary definitions used in reference tables. JavaScript uses double-precision floats, so extremely long decimals may show tiny rounding differences.
Does my input leave my device?
No. The page runs entirely in your browser; values are not sent to AnyServ servers for conversion.
US vs imperial gallons?
Volume presets use US customary cups, fluid ounces and gallons. UK imperial gallons differ; add a category later if you need them.
Can I convert currencies here?
No - use the Currency Converter for money. This tool is for physical units only.
What about data and energy units?
This version focuses on everyday length, mass, volume, temperature, area and speed. More categories can be added over time.