Enzyme Activity Calculator
Free calculate enzyme activity, michaelis-menten kinetics, vmax, km, and enzyme inhibition parameters.
Enter Enzyme Data
Optional - for inhibition studies
Results
Enter enzyme data to calculate activity
Michaelis-Menten Equation
Michaelis-Menten Equation
v = (Vmax × [S]) / (Km + [S])
- • v = Initial velocity
- • Vmax = Maximum velocity
- • [S] = Substrate concentration
- • Km = Michaelis constant
- • Km = [S] when v = Vmax/2
Enzyme Parameters
- • Vmax: Maximum reaction rate
- • Km: Substrate affinity
- • kcat: Turnover number
- • kcat/Km: Catalytic efficiency
- • Lower Km = higher affinity