kcat ↔ ΔG‡ Calculator

Transition State Theory — Eyring Equation

ΔG‡ = −R · T · ln( h · kcat / kB · T )

kcat → Activation Free Energy (ΔG‡)

s⁻¹
K
— kcal/mol
Enter a kcat value above

Turnover timescale (1/kcat)

—
s
—
ms
—
μs

ΔG‡ → kcat (reverse)

kcal/mol
K
— s⁻¹
Enter a ΔG‡ value above
h (Planck)6.6261 × 10⁻³⁴ J·s kB (Boltzmann)1.38066 × 10⁻²³ J/K R (gas constant)8.314 J/(mol·K) 1 kcal4184 J