Hardness Units Converter
Free online concentration unit converter.
Convert between all concentration units instantly with accurate results, formulas, and reference tables.
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Frequently Asked Questions
Common questions about the Hardness Units Converter
Concentration describes how much of a substance is present in a mixture. It can be expressed as mass/volume (mg/L), molar (mol/L), parts per million (ppm), or percentage.
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Sources & References
International System of Units (SI): amount-of-substance concentration
Amount-of-substance concentration is measured in the mole per cubic metre (mol/m³). Conversions between SI and other units use exact, internationally agreed factors maintained by NIST.
International System of Units (SI)
Authoritative definitions for amount-of-substance concentration, from the BIPM SI Brochure (9th edition), the defining reference for the SI.