Chemistry

Instant, private, and free

Mixing Ratio Calculator.

Calculate a solute-to-solvent ratio with an explicit mass, volume, or molar basis.

On-device calculationNo signup
01

Set your values

Results update as you type.

Solute-to-solvent ratio: 0.25

Solute-to-solvent ratio

0.25
Ratio percent: 25 %

Ratio percent

25.00%

How to Use

Ratio = numerator ÷ denominator. Select the basis so the two entered quantities use the same convention.

Use a named source for any material-specific coefficient. This page does not infer local rates, species tables, laboratory methods, or safety guidance.

Use Cases

Preparing laboratory solutions

Quickly determine the ratio of solute to solvent needed for a solution, whether by mass, volume, or moles, to ensure accurate concentrations.

Example: Mix 5 g of salt with 100 mL of water to get a 1:20 mass-to-volume ratio.

Diluting concentrated chemicals

Calculate the ratio for diluting a stock solution to a desired concentration, using volume or molar amounts.

Example: Dilute 10 mL of acid with 90 mL of water for a 1:9 volume ratio.

Frequently Asked Questions

What does the mixing ratio calculator do?
It calculates the ratio of solute to solvent based on the amounts you enter. You can choose the basis as mass, volume, or molar amount, then input the solute and solvent amounts to get the ratio.
How do I choose the ratio basis?
Select 'Mass' if you are measuring in grams or kilograms, 'Volume' for liters or milliliters, or 'Molar amount' for moles. The calculator then uses the same unit for both solute and solvent to compute the ratio.
Can I use this calculator for any solute and solvent?
Yes, as long as you know the amounts. It works for any chemical or liquid where you need a mixing ratio, such as solutions, dilutions, or mixtures.

Tips & Common Mistakes

Tips

  • Ensure both solute and solvent amounts are in the same unit for the chosen basis (e.g., both in grams for mass, both in liters for volume).
  • For molar amounts, use moles; if you have molarity and volume, convert to moles first.
  • Double-check your inputs for accuracy, as the ratio is directly affected by the amounts entered.
  • Use the ratio to scale up or down your mixture proportionally.

Common Mistakes to Avoid

  • Mixing units, such as using grams for solute and milliliters for solvent when the basis is mass.
  • Forgetting to convert volume to the same unit (e.g., using mL and L together).
  • Entering the solute and solvent amounts in the wrong fields, which would invert the ratio.

Last updated: August 13, 2026