Calculate cube, cylinder, sphere, and prism volume.

Calculate alcohol dilution to a target strength.

Calculate an average score from a list of grades.

Add, subtract, multiply, and divide fractions.

Calculate discounted price and savings.

Solve ax² + bx + c = 0 using the discriminant.

Basic currency conversion with editable rates.

Percentage calculator online: find a percent of a number, ratio percentage, or percent increase and decrease.

VAT calculator online: add VAT to a net amount or extract VAT from a gross total with clear net, tax, and gross results.