Percentage calculator
Mass Percent Calculator
Mass percent describes how much of a mixture or solution is made up by a particular component, based on mass.
Mass percent
15%
Component mass as a percentage of total mixture mass.
Formula
(Component Mass / Total Mass) × 100Step-by-step calculation
- 1
Make sure both masses use the same unit.
- 2
Divide component mass by total mixture mass.
- 3
Multiply by 100 to get mass percent.
Formula
Mass Percent = (Mass of Component ÷ Total Mass of Mixture) × 100
How to calculate it
- Measure the mass of the component being studied.
- Determine the total mass of the complete mixture or solution.
- Divide component mass by total mass and multiply by 100.
A solution contains 5 g of salt in 100 g of solution
Values: Component mass = 5 g; total solution mass = 100 g.
Result: 5 ÷ 100 × 100 = 5% by mass.
Frequently asked questions
Is mass percent the same as mass divided by solvent mass?
No. The denominator is the total mass of the mixture or solution, including the component.
Do both masses need the same unit?
Yes. Convert component mass and total mass to the same unit before calculating.
Can mass percent exceed 100%?
For a non-negative component that is part of the stated total mixture mass, its mass percentage cannot exceed 100%.