Dilution Calculator

Concentration of the solution you are diluting. Leave blank to solve for it.
Volume of stock taken, or the volume of solution you already have. Leave blank to solve for it.
Concentration you want after dilution. Leave blank to solve for it.
Total volume of the finished solution. Leave blank to solve for it.
Labels the answer only. C1 and C2 must already be in the same unit.
Number of successive transfers. Leave at 0 for a single dilution.
A 10 means each tube is one tenth of the one before it.
Stock volume to take (V1)
20.000000
Dilution Calculator
Solvent to add
80.000000
Final volume (V2)
100.000000
Stock concentration (C1)
10.000000
Final concentration (C2)
2.000000
Dilution factor
5.000000
Concentration unit
mol/L
Worked out from OpenStax Chemistry 2e, section 3.3 Molarity - Dilution of Solutions and 2 other sources.
Add the stock to the solvent and make the solution up to the final volume; volumes of mixed liquids are not exactly additive. Verify the result before preparing reagents that will be dosed or assayed.

How this is worked out

3 steps
  1. V1 = C2 x V2 / C1 = 2 x 100 / 10 = 20
  2. Solvent to add = V2 - V1 = 100 - 20 = 80
  3. Dilution factor = C1 / C2 = 5 -fold

Results are general information, not financial, tax, legal, medical or engineering advice.