Calculadora de Concentração
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
C = m/V (g/L) ; M = n/V = m/(Mm·V)
About this calculator
This concentration calculator allows you to determine the common concentration (in g/L) and molar concentration (in mol/L) of a solution. The common concentration is calculated by dividing the mass of the solute (in grams) by the volume of the solution (in liters). The molar concentration is obtained by dividing the number of moles of solute by the volume of the solution, where the number of moles is the mass of the solute divided by its molar mass.
To use the tool, you need to provide the mass of the solute, the volume of the solution, and the molar mass of the solute. The calculator then displays both types of concentration. This is useful in chemical laboratories, solution preparation, quality control, and academic studies, where knowing the exact amount of solute in a given volume of solution is essential.
Important precautions: ensure that the units are correct (grams for mass, liters for volume, and g/mol for molar mass). Common mistakes include using milliliters instead of liters or forgetting to convert the molar mass. Also, remember that molar concentration depends on molar mass, which varies for each substance. Always check the purity of the solute and the temperature of the solution, as density can vary.
Frequently asked questions
What is the difference between common concentration and molar concentration?
Common concentration is expressed in grams per liter (g/L) and relates the mass of solute to the volume of solution. Molar concentration is expressed in moles per liter (mol/L) and relates the amount of substance (number of moles) of solute to the volume of solution.
Can I use milliliters instead of liters?
Yes, but you need to convert milliliters to liters by dividing by 1000. The calculator expects volume in liters to give correct results.
What is molar mass and how do I find it?
Molar mass is the mass of one mole of the substance, expressed in g/mol. It can be found in the periodic table by summing the atomic masses of the elements that make up the substance.
Does the calculator consider the temperature of the solution?
No, the calculator does not consider temperature. For accurate calculations, remember that density and volume can vary with temperature. Use volumes measured at the temperature of interest.
Can I use this calculator for solutions with more than one solute?
No, this calculator is for solutions with a single solute. For mixtures, calculate the concentration of each component separately.