Lineweaver-Burk Plot Calculator

Lineweaver-Burk Plot Calculator. The Lineweaver-Burk Plot Calculator generates a double-reciprocal plot used in enzyme kinetics to visualize how an enzyme's reaction rate relates to substrate concentration — a standard method for determining key kinetic constants from experimental data. Enter your enzyme's Vmax (maximum reaction velocity) and Km (Michaelis constant), then provide your substrate concentrations as comma-separated values. The calculator returns the Y-intercept (1/Vmax), X-intercept (−1/Km), slope (Km/Vmax), and R² linearity value. Also try the calculate Enzyme Activity (Units) Enzyme Activity.

Vmax (Maximum reaction velocity) *

μmol/min

Maximum velocity of the enzyme-catalyzed reaction

Km (Michaelis constant) *

Michaelis-Menten constant representing substrate concentration at half Vmax

Substrate Concentrations *

Enter substrate concentrations in mM, separated by commas

Number of Plot Points *

Number of calculated points for the plot line

Results

Y-intercept (1/Vmax)

X-intercept (-1/Km)

Slope (Km/Vmax)

R² (Linearity)

Results Table

What is a Lineweaver-Burk plot used for?

The Lineweaver-Burk plot is used to determine enzyme kinetic parameters Km and Vmax by transforming the hyperbolic Michaelis-Menten curve into a straight line using double reciprocal values. See also our Isoelectric Point (pI) Calculator.

How do you read the intercepts on a Lineweaver-Burk plot?

The y-intercept equals 1/Vmax, the x-intercept equals -1/Km, and the slope equals Km/Vmax. This linear transformation makes it easier to determine kinetic parameters accurately.

What are the advantages of the Lineweaver-Burk method?

It converts the hyperbolic Michaelis-Menten equation into a linear form, making it easier to calculate Km and Vmax values and identify different types of enzyme inhibition patterns.

What are the limitations of Lineweaver-Burk plots?

The method can amplify experimental errors at low substrate concentrations and may give unequal weight to data points, potentially leading to less accurate parameter estimates.

At what substrate concentration is the enzyme working at half capacity?

The enzyme works at half its maximum capacity when the substrate concentration equals Km (the Michaelis constant). At this point, the reaction velocity is Vmax/2.

How does the Lineweaver-Burk equation relate to Michaelis-Menten kinetics?

The Lineweaver-Burk equation is the reciprocal form of the Michaelis-Menten equation: 1/v = (Km/Vmax) × (1/[S]) + 1/Vmax, where v is velocity and [S] is substrate concentration. You might also find our find Q₁₀ Coefficient with Q10 Temperature Coefficient Calculator useful.