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Solution Dilution Calculator

Solve the C1V1 = C2V2 equation for any value and see how much diluent to add.

Dilute a stock solution

Result: —
Stock solution: —
Diluent to add: —
Dilution uses C1 x V1 = C2 x V2. Both concentrations must share one unit and both volumes another.

How to use the Solution Dilution Calculator

  1. Choose which value you want to solve for.
  2. Enter the three known concentrations and volumes.
  3. Read the answer and the volume of diluent to add.

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Frequently Asked Questions

Common questions about the free online solution dilution calculator.

The dilution equation is C1 times V1 equals C2 times V2, where C1 and V1 describe the stock solution and C2 and V2 the diluted one.
Multiply the stock concentration by the stock volume, then divide by the final concentration to get the final volume after dilution.
Subtract the stock volume from the final volume. The difference is the volume of solvent you add to reach the target.
Yes. Both concentrations must share one unit and both volumes another, though either pair may be litres or millilitres.
Yes. Set the solve option to stock concentration and fill in the other three values to find the strength you started with.
Dilution only adds solvent, so the moles of solute stay the same while the volume rises and the concentration falls.
No. The dilution calculation runs locally in your browser and your values never leave your device.
Yes. The calculator is responsive and behaves the same way on a phone, a tablet or a desktop computer.

Last updated: October 10, 2026