convertimate Partition coefficient

Log P to natural log P

Type a value in log P to get it in ln P instantly.

4.605ln P

That's 6.5× as greasy as aspirin, while an ideal oral drug is 3.2× greasier. About 99.01% of it ends up in the oily layer.

What it means

Where does it go?

Log P is for the neutral molecule. For anything that ionizes, log D at a stated pH is the figure that matters in the body.

The math

How to convert log P to ln P

To convert log P to natural log P, multiply by 2.30259.

Example: 2 log P × 2.30259 = 4.60517 ln P.

In the other direction, 1 ln P = 0.434294 log P.

Every unit

Your partition in every unit

Tables

log P to ln P conversion table

log P to ln P conversion table
log Pln P
-3 log P-6.90776 ln P
-2 log P-4.60517 ln P
-1 log P-2.30259 ln P
0 log P0 ln P
1 log P2.30259 ln P
2 log P4.60517 ln P
3 log P6.90776 ln P
4 log P9.21034 ln P
5 log P11.5129 ln P
6 log P13.8155 ln P
8 log P18.4207 ln P
ln P to log P conversion table
ln P to log P conversion table
ln Plog P
-3 ln P-1.30288 log P
-2 ln P-0.868589 log P
-1 ln P-0.434294 log P
0 ln P0 log P
1 ln P0.434294 log P
2 ln P0.868589 log P
3 ln P1.30288 log P
4 ln P1.73718 log P
5 ln P2.17147 log P
6 ln P2.60577 log P
8 ln P3.47436 log P

Quick answers

Quick answers

How many ln P is 1 log P?
1 log P is 2.30259 ln P.
How many ln P is 10 log P?
10 log P is 23.0259 ln P.
How many ln P is 2 log P?
2 log P is 4.60517 ln P.

The units

About these units

Log P (log P)

The base-ten logarithm of the octanol–water ratio.

Natural log P (ln P)

The natural-log version, used in thermodynamic work.

Learn more about partition units

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