Molar to milliosmoles per liter
Type a value in M to get it in mOsm/L instantly.
150,000mOsm/L
That's 150× as concentrated as seawater — nothing on our list beats it. That is hypertonic: cells placed in it would shrink.
What it means
How concentrated is that?
Real salts do not dissociate perfectly, so measured osmolarity runs a few percent below the ideal figure. The osmotic coefficient of saline is about 0.93.
The math
How to convert M to mOsm/L
Osmosis counts particles: mOsm/L = mmol/L × particles per molecule. The figures below use the solute selected above.
Example: 150 M = 150,000 mOsm/L.
The table below is for Glucose (1 particle).
Every unit
Your osmolarity in every unit
Tables
M to mOsm/L conversion table
| M | mOsm/L |
|---|---|
| 10 M | 10,000 mOsm/L |
| 25 M | 25,000 mOsm/L |
| 50 M | 50,000 mOsm/L |
| 100 M | 100,000 mOsm/L |
| 150 M | 150,000 mOsm/L |
| 200 M | 200,000 mOsm/L |
| 280 M | 280,000 mOsm/L |
| 300 M | 300,000 mOsm/L |
| 500 M | 500,000 mOsm/L |
| 1,000 M | 1,000,000 mOsm/L |
| 2,000 M | 2,000,000 mOsm/L |
mOsm/L to M conversion table
| mOsm/L | M |
|---|---|
| 10 mOsm/L | 0.01 M |
| 25 mOsm/L | 0.025 M |
| 50 mOsm/L | 0.05 M |
| 100 mOsm/L | 0.1 M |
| 150 mOsm/L | 0.15 M |
| 200 mOsm/L | 0.2 M |
| 280 mOsm/L | 0.28 M |
| 300 mOsm/L | 0.3 M |
| 500 mOsm/L | 0.5 M |
| 1,000 mOsm/L | 1 M |
| 2,000 mOsm/L | 2 M |
Quick answers
Quick answers
- How many mOsm/L is 1 M?
- 1 M is 1,000 mOsm/L.
- How many mOsm/L is 10 M?
- 10 M is 10,000 mOsm/L.
- How many mOsm/L is 150 M?
- 150 M is 150,000 mOsm/L.
The units
About these units
Molar (M)
Moles per liter of the solute itself.
Milliosmoles per liter (mOsm/L)
The clinical standard. Plasma is about 290 of them.
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