Four calculation modes: basic percentage, what percent, find original number, and percentage change
What is P% of N?
Basic (X% of Y), What Percent (X is what % of Y), Find Number (X% of ? = Y), and Percentage Change — all in a single tool.
Every result includes the formula and step-by-step breakdown so you can follow the math and catch mistakes.
Calculator
Basic calculator for mathematical operations
Average Calculator
Calculate the average of a set of numbers
Area Calculator
Calculate area and perimeter for 9 shapes — rectangle, circle, triangle, trapezoid, ellipse & more
GST Calculator
Calculate GST, add or remove tax from prices
Unit Converter
Convert between different units of measurement
Trigonometric Functions
Calculate sine, cosine, tangent and other trig functions