Education & Student
Dilution Calculator
Dilution: it applies the dilution relation C₁V₁ = C₂V₂ to solve for the unknown concentration or volume. Worked through below with real figures, and the calculator repeats the working on your own inputs — free, on-device, instant.
Dilution Calculator takes your initial concentration, initial volume and final concentration and gives back the missing concentration or volume, applying C₁V₁ = C₂V₂. It's a quick, browser-based way to work out a dilution.
About this calculator
Dilution is easiest to get wrong in the setup, not the arithmetic. It applies the dilution relation C₁V₁ = C₂V₂ to solve for the unknown concentration or volume. It matters when grades, percentages or averages decide a next step and hand arithmetic is error-prone. The worked example on this page (Using C₁V₁ = C₂V₂, diluting 2 M to 0.5 M in 100 mL needs 0.5 × 100 ÷ 2 = 25 mL of stock topped up to 100 mL.) shows the full substitution; the calculator above runs the same working on your own numbers, in your browser, with nothing uploaded.
How to use
- Enter the initial concentration C₁.
- Enter the initial volume V₁.
- Enter the desired final concentration C₂.
- Press Calculate to find the final volume and diluent to add.
Why use Dilution Calculator
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Accurate
Uses standard formulas for quick educational estimates; check critical results before relying on them.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Honest disclaimers wherever browser limits or regional rules apply.
Common uses
Use it for tutoring and study groups
Use it for quick what-if calculations
Use it for science-fair preparation
Use it for verifying a textbook result
Use it for cross-checking a measurement
Use it when revising for science exams
Technical notes
Dilution Calculator applies the dilution relation C₁V₁ = C₂V₂ to solve for the unknown concentration or volume.
Results assume ideal conditions and consistent units, so convert your inputs to the units shown before calculating.
Nothing you type is uploaded — the calculation happens entirely on your device.
FAQ
What formula does this use?
It uses C₁V₁ = C₂V₂, the standard dilution relationship for concentration and volume.
Why must the final concentration be lower?
Diluting always lowers concentration, so the final concentration must be less than the initial one.
What does the diluent amount mean?
It is how much solvent to add to reach the final volume, equal to the final volume minus the starting volume.
Does the Dilution Calculator send my data to a server?
No. The Dilution Calculator runs entirely in your browser, so nothing you enter is uploaded, stored, or shared.
Worked example
Using C₁V₁ = C₂V₂, diluting 2 M to 0.5 M in 100 mL needs 0.5 × 100 ÷ 2 = 25 mL of stock topped up to 100 mL.