Calculators

Estimates the material needed and costs for your paver project, including pavers, base material, and sand.

Calculates the rate constant (k), reaction rate, or substance concentration using the rate law equation.

Calculates the frequency (in Hertz) of a specific musical note.

Calculates your car's miles per gallon (MPG) based on miles driven and gallons of fuel used.

Calculates the recommended clearance hole diameter for bolts and screws based on the bolt/screw size.

Calculates the pKa value of a solution using either the Henderson-Hasselbalch equation or the acid dissociation constant (Ka).

Calculates the angles of constructive interference (maxima) for light passing through a diffraction grating. This calculator uses the grating equation: d * sin(θ) = m * λ, where d is the slit separation, θ is the angle of diffraction, m is the order of the maximum, and λ is the wavelength of light.

Calculates the duration of pregnancy in weeks and days from the last menstrual period (LMP) or conception date.

Tracks and manages personal or business expenses, calculating total expenses and remaining budget.

Calculates the type of chemical bond formed between two atoms based on the difference in their electronegativity values.