Volume from Molarity Calculator Formula
Understand the math behind the volume from molarity calculator. Each variable explained with a worked example.
Formulas Used
Volume Needed
volume_liters = moles_needed / molarityVolume Needed
volume_mL = (moles_needed / molarity) * 1000Variables
| Variable | Description | Default |
|---|---|---|
moles_needed | Moles Needed(mol) | 0.1 |
molarity | Molarity of Solution(M) | 0.5 |
How It Works
How to Calculate Volume from Molarity
Formula
V = n / M
Rearrangement of M = n/V. V is in liters when M is mol/L and n is mol.
Worked Example
How much 0.5 M NaOH to get 0.1 mol?
moles_needed = 0.1molarity = 0.5
- 01V = n / M
- 02V = 0.1 / 0.5
- 03V = 0.2 L = 200 mL
Frequently Asked Questions
When would I use this?
When you know how many moles of reagent you need and want to know what volume of stock solution to measure.
Can I use other concentration units?
This works with molarity (mol/L). Convert other units to molarity first.
What if I need a mass instead of moles?
Convert mass to moles first by dividing by molar mass, then use this calculator.
Ready to run the numbers?
Open Volume from Molarity Calculator