Unit Converter
Convert between units of length, weight, temperature, area, and speed. Results update instantly.
1 Meter (m) =
0.001
Kilometer (km)
How to use
- Pick a category (length, weight, temperature, area, or speed).
- Enter a value and select the unit you are converting from.
- Choose the target unit — the result updates instantly.
- Switch categories anytime; inputs reset for the new dimension.
Unit conversion with trustworthy constants
This tool focuses on SI-derived and common US customary factors used in engineering and daily life. Temperature uses defined offsets (°F vs °C) rather than linear ratios, so the UI treats it specially.
When precision matters: aviation fuel pounds-to-gallons vs lab chemistry μL conversions may need instrument-specific densities—use this for everyday accuracy, not certification paperwork.
Pairs with BMI / TDEE calculators when you flip between metric and imperial health inputs.
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Frequently Asked Questions
What types of units can I convert?
The converter supports length, weight/mass, temperature, volume, area, speed, and more. Select a category, choose your units, and enter a value.
How accurate are the conversions?
Conversions use standard internationally recognised factors. Results are shown to several significant figures, sufficient for most everyday and technical uses.
Can I convert temperature using the same interface?
Yes. Select the Temperature category and choose between Celsius, Fahrenheit, and Kelvin. Temperature uses offset formulas, not simple multiplication, which the tool handles automatically.
Why are some conversions approximate?
Some units (e.g., cups to millilitres) have slight regional variations. The tool uses the most widely accepted international standard value.
Can I convert in both directions?
Yes. Enter a value in either the source or result field, and the opposite field updates automatically.
Does it work offline?
Yes. All conversion factors are built into the tool and require no internet connection.