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 dilution calculator (C1V1 = C2V2) is a critical tool for analytical chemistry, especially in solution preparation. It calculates the concentration or volume needed after diluting a solution using the formula C1·V1 = C2·V2. Apply it in labs, pharmaceutical industries, or environmental analysis for precise reagent adjustments.
It works with three variables: initial concentration (C1), initial volume (V1), and final volume (V2). The formula calculates the final concentration (C2) by multiplying C1 by V1 and dividing by V2. For example, diluting 50 mL of 2 M acid to 100 mL results in 1 M. Factor order is essential to avoid preparation errors.
Use this tool when you need accurate dilutions, such as titration experiments, sample preparation for analysis, or medication adjustments. Avoid common mistakes like confusing dilution with concentration or neglecting unit measurements. Always verify reagent balance before calculations.
Frequently asked questions
What are C1 and C2 in the formula?
C1 is the initial solution concentration, and C2 is the concentration after dilution. Both must use the same unit (e.g., mol/L).
How to calculate the final volume needed?
Input C1, V1, and C2. The calculator solves V2 = (C1·V1)/C2 automatically.
Can this formula be used for any substance?
Yes, as long as dilution doesn't change the solution's stoichiometry and units are compatible.
What if the result is negative?
Negative values indicate input errors. Check that C1 > C2 and V2 > V1 for dilutions.