Converter for Water Hardness

Convert water hardness instantly! Supports all common units and delivers fast, accurate results for home, aquariums, pools, coffee machines and more.

The easy way to convert water hardness values.

Water Hardness Converter allows you to convert water hardness between all common international units quickly and accurately.

Whether you need the correct value for your coffee machine, aquarium, swimming pool, water softener or laboratory work, this app provides reliable conversions in seconds.

Different countries use different water hardness scales. Simply enter one value and the app automatically calculates all other supported units.

Features • Convert between all major water hardness units • German degrees (°dH) • French degrees (°fH / °f) • English degrees (°e) • American hardness (ppm / mg/l CaCO₃) • Millimoles per litre (mmol/l) • Instant calculations • Clean and intuitive interface • Accurate and reliable conversions

Ideal for: • Coffee machines and espresso makers • Water softeners and filtration systems • Aquariums and fish tanks • Swimming pools and spas • Heating systems • Laboratories and education

Keep all important water hardness values at your fingertips with Water Hardness Converter.