Unit Converters
CM to Inches Converter
Convert centimeters to inches instantly using the exact 2.54 cm definition.
Open calculatorCALCULATOR CATEGORY
Unit Converters
Convert length, mass, temperature, area, and US liquid volume with precise factors and named unit definitions.
Unit Converters
Inches to CM Converter
Convert inches to centimeters instantly with the exact conversion factor.
Open calculatorUnit Converters
KG to LBS Converter
Convert kilograms to pounds instantly with a precise conversion factor.
Open calculatorUnit Converters
LBS to KG Converter
Convert pounds to kilograms instantly and accurately.
Open calculatorUnit Converters
Celsius to Fahrenheit Converter
Convert temperatures from Celsius to Fahrenheit instantly.
Open calculatorUnit Converters
Fahrenheit to Celsius Converter
Convert temperatures from Fahrenheit to Celsius instantly.
Open calculatorUnit Converters
KM to Miles Converter
Convert kilometers to miles instantly with a precise conversion factor.
Open calculatorUnit Converters
Miles to KM Converter
Convert miles to kilometers instantly using the exact mile definition.
Open calculatorUnit Converters
Square Meter to Square Feet Converter
Convert area from square meters to square feet instantly.
Open calculatorUnit Converters
Liter to Gallon Converter
Convert liters to US liquid gallons instantly and accurately.
Open calculatorConvert units without losing the definition
These converters use fixed mathematical factors for length, mass, area, and US liquid volume, plus the required offset for Celsius and Fahrenheit. Area factors are squared length factors, and a US liquid gallon is different from an imperial gallon.
- Keep more digits during a calculation and round only the final value for better precision.
- Confirm whether a volume uses US liquid gallons or imperial gallons before converting.
- Use the reverse converter when you need to preserve the direction and units in a saved result.
LEARN & APPLY
All guides →Calculation guides
Worked decisions, assumptions, and checks that put the tools in context. Guides are currently published in English.
Unit Conversion Factors, Area, Temperature & Sensible Rounding
Identify the exact unit before converting length, mass, area, temperature, or volume, and avoid common errors with squared factors, offsets, and rounding.
Read the guide →