About this app
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.
Latest release
What’s New
• Modernized user interface • Improved presentation of conversion results • Better usability on iPhone and iPad • Performance and stability improvements • Minor design enhancements and bug fixes
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 19, 2026 · 6:33 PM Free
Screenshots
