%m/V prep
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The m/V percentage solution preparation calculator determines the solute mass needed for a specific solution concentration. Using the formula m = (% × V)/100, where m is mass in grams, % is the concentration as a percentage (m/V), and V is the solution volume in milliliters. It's commonly used in chemistry labs to prepare diluted solutions for experiments.
The calculation multiplies the desired percentage by the solution volume and divides by 100. For instance, creating 500 mL of 10% solution requires (10 × 500)/100 = 50 grams of solute. The result provides the exact mass to dissolve in the solvent to achieve the target concentration.
Units must be verified: volume in milliliters and percentage without units. This method is standard in clinical labs and pharmaceutical industries where precision is critical. Avoid approximations, especially for medical or food-grade preparations to prevent contamination risks.
Frequently asked questions
How to use the calculator for solution preparation?
Enter the concentration percentage and desired volume. The formula (mass = (% × volume)/100) automatically calculates the required solute mass.
What's the difference between % m/V and other concentration types?
% m/V indicates grams of solute per 100 mL solution, contrasting with % m/m (mass/mass) and % V/V (volume/volume).
Can I use liters instead of milliliters?
No. The formula requires volume in milliliters. Convert liters to mL by multiplying by 1000 before inputting.
What does the calculated mass represent?
It represents the exact amount of solute to dissolve in solvent to achieve the specified concentration.