Diluição % (C₁V₁ = C₂V₂)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The percentage dilution calculator helps determine concentrations and volumes when preparing diluted solutions. It uses the formula C₁V₁ = C₂V₂, where C represents concentration and V is the volume. It's commonly used in chemistry, biology, and industry to adjust reagents or samples to specific concentrations.
The formula operates on the principle of solute conservation: when mixing different volumes of varying concentrations, the product of the initial concentration and volume must equal the product of the final concentration and volume. For example, diluting a concentrated acid with water to achieve a lower acidity solution.
Use this calculator when you need to prepare solutions with specific concentrations, such as in laboratories or pharmaceutical industries. It's ideal for calculating how much solvent to add to a concentrated solution to reach the desired volume.
Note: Ensure all units are compatible (e.g., mL and M for volume/concentration). The calculator does not account for chemical reactions between components, only physical mixtures.
Frequently asked questions
What formula does the calculator use?
The calculator uses the formula C₁V₁ = C₂V₂, where C is concentration and V is volume, keeping the solute amount constant.
How to find an unknown initial volume?
Enter known values for C₁, C₂, and V₂. The calculator will solve for V₁ using the rearranged formula.
Can I use different concentration units?
Yes, but all units must be converted to the same system (e.g., M for molarity) before calculating.
Does it work for multiple dilution steps?
No, this calculator is for single-step dilutions. For multiple steps, use each result as input for the next.
What is a dilution factor?
It is the ratio of initial to final concentration (C₁/C₂), showing how many times the solution was diluted.