Free · Mixtures and solutions calculators ⚗️

Solution Concentration and Dilution Modes

Calculate mass/volume percent, mass fraction, molarity, dilution or a density-based concentration with separate mode controls.

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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

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Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

10 g in 100 mL gives 10 g per 100 mL, conventionally 10% mass/volume.

w/v percent = 100 m/V; molarity = solute mass/(molar mass × solution volume)

Worked example

Enter these known values and leave the other values blank.

I want to calculate...
Mass volume percent (w/v%)
Mass of solute
10 g
Volume of solution
100 mL
Concentration
10 m/v %

Assumptions and limitations

  • Mass/volume percent means grams per 100 mL; it is not a dimensionless mass fraction. Mass-percent mode uses total solution mass, and molarity uses final solution volume.
  • Dilution assumes conserved solute and compatible concentration units. Density mode uses solution density, not pure-solute density, and assumes the stated solvent basis for mass per 100 g water.

Common questions

What does this model assume?

Mass/volume percent means grams per 100 mL; it is not a dimensionless mass fraction. Mass-percent mode uses total solution mass, and molarity uses final solution volume.

Can I solve backward?

Clear the unknown value and enter compatible known values. Choices, one-way outputs and singular boundary cases cannot always be inverted.

References

Explicit physical and mathematical model domains: finite positive denominators, dilute limiting-law applicability, integral ionic charge numbers, nonnegative concentrations and normalized isotope abundances.

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