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Frequently asked questions
Which units can I convert?
The unit converter supports 7 categories: length (mm, cm, m, km, inch, foot, mile), weight (mg, g, kg, tonne, ounce, pound), temperature (Celsius, Fahrenheit, Kelvin), area, volume, speed and data sizes.
How accurate are the conversions?
The conversions use internationally standardised conversion factors with a precision of up to 10 significant digits – more than enough for everyday and professional use.
How do I convert Fahrenheit to Celsius?
Choose the ‹Temperature› category, enter the value in Fahrenheit and pick Celsius as the target unit. The formula is °C = (°F − 32) × 5/9. The tool calculates it automatically.
How many centimetres is an inch?
1 inch is exactly 2.54 centimetres. Just enter a value and the converter shows the result in the unit you want right away.
Does the converter work offline?
Yes. All calculations run locally in your browser, so you don't need an internet connection once the page has loaded.