Equilibrium constant to log K
Type a value in K to get it in log K instantly.
3log K
That's about the same as a favorable reaction. At equilibrium about 99.9% has reacted.
Convert the other way: log K to K
What it means
Which way does it go?
Values are at 25 °C. Free energy scales with temperature, so the same K means a different ΔG° in a furnace.
The math
How to convert K to log K
The constant and the free energy are the same statement: ΔG° = −RT ln K, which at 25 °C is ΔG° = −5.708 × log₁₀K kJ/mol.
Example: 1,000 K = 3 log K.
Every unit
Your equilibrium in every unit
Tables
K to log K conversion table
| K | log K |
|---|---|
| 1×10⁻¹⁰ K | -10 log K |
| 1×10⁻⁶ K | -6 log K |
| 0.001 K | -3 log K |
| 0.1 K | -1 log K |
| 1 K | 0 log K |
| 10 K | 1 log K |
| 1,000 K | 3 log K |
| 1,000,000 K | 6 log K |
| 1×10¹⁰ K | 10 log K |
| 1×10¹² K | 12 log K |
log K to K conversion table
| log K | K |
|---|---|
| -10 log K | 1×10⁻¹⁰ K |
| -6 log K | 1×10⁻⁶ K |
| -3 log K | 0.001 K |
| -1 log K | 0.1 K |
| 0 log K | 1 K |
| 1 log K | 10 K |
| 3 log K | 1,000 K |
| 6 log K | 1,000,000 K |
| 10 log K | 1×10¹⁰ K |
| 12 log K | 1×10¹² K |
Quick answers
Quick answers
- How many log K is 1 K?
- 1 K is 0 log K.
- How many log K is 10 K?
- 10 K is 1 log K.
- How many log K is 1,000 K?
- 1,000 K is 3 log K.
The units
About these units
Equilibrium constant (K)
Products over reactants at equilibrium.
Log K (log K)
The base-ten logarithm, which is what tables usually print.
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