Chemistry
Dilution Calculator
Solve V2 from C1V1=C2V2.
Free to use — no sign-up or login.
V2 (mL)
Amortization schedule
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Dilution here uses V2 = C1 × V1 / C2. C1 and C2 must share one concentration unit. V1 and V2 share the volume unit you type, labeled in milliliters.
If you need moles from a mass, start with the mole calculator and bring the concentration back here.
Same concentration unit on both sides
The formula cancels concentration only when C1 and C2 use the same unit, such as mol/L with mol/L. Mixing mol/L and percent does not cancel.
Not a pH or titration tool
This page does not convert pH to concentration and it does not solve an acid-base titration. It only scales one volume so the diluted concentration is C2.
Worked example: 1 mol/L to 0.1 mol/L
C1 = 1, V1 = 50 mL, C2 = 0.1. V2 = 1 × 50 / 0.1 = 500 mL. The result is shown to three decimal places.
\[ V_2 = (1 \times 50) / 0.1 = 500\ \mathrm{mL} \]
Frequently asked questions
What does V2 mean?
The volume after dilution that reaches concentration C2 from stock C1 and volume V1.
Do C1 and C2 need the same unit?
Yes. The labels say so. The number 1 and the number 0.1 only match if both are mol/L, or both are the same other unit.
Is this a pH calculator?
No. Enter concentration, not pH.
What if C2 is larger than C1?
That would be concentrating, not diluting, and V2 would come out smaller than V1. Check the inputs.
Why three decimal places?
Volumes and concentrations on this page are shown to three decimals so a long tail does not appear.
References
Assumptions and limitations
Chemistry calculators are for study and illustration, not laboratory procedure or safety guidance. Confirm units, significant figures, and protocols from primary references before any practical work.
The calculator assumes you mix into a final volume V2. It does not compute the solvent volume separately, and it is not a titration worksheet.