How to use the hydrate water percentage calculator
Find the percent water in a hydrated salt. Enter hydrate formula, number of water molecules in the fields above; the molar mass of hydrate, water mass percent are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- f — Hydrate formula
- w — Number of water molecules
Worked example
With hydrate formula = CuSO4.5H2O, number of water molecules = 5, the calculator gives molar mass of hydrate ≈ 249.677 g/mol; water mass percent ≈ 36.07661 %.
Frequently asked questions
What is the formula for the hydrate water percentage calculation?
Molar mass of hydrate (g/mol) = molmass(f). Water mass percent (%) = 100 × w × 18.015 / [Molar mass of hydrate]. Here f is hydrate formula, w is number of water molecules.
What inputs do I need for the hydrate water percentage calculator?
You need hydrate formula, number of water molecules. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.