Unit Converter
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Unit Conversion – Quick Answers
Why is an inch exactly 2.54 cm?
The English inch equals the German “Zoll”. Since 1959 it’s defined as exactly 25.4 mm (2.54 cm). Use the inch-to-cm converter for screen sizes, tyres or woodworking.
Popular searches & solutions
- cm to mm converter: multiply by 10 or pick “cm → mm”.
- kg to g: value × 1 000 – the tool auto-does it.
- litres to ml: factor 1 000; choose “L → mL”.
- lbs to kg: 1 lb ≈ 0.453592 kg.
How accurate are the factors?
Length and weight conversions follow SI definitions; volume uses the US-gallon (3.78541 L). Results are rounded to two decimals.