Math Calculators

Percentages, tips, discounts, probability, and general maths.

Percentage Calculator

Find percentages, percentage of a number, and percentage differences instantly.

Calculate the tip amount and split any bill equally between your group.

Find the sale price, savings amount, and effective discount rate for any deal.

Calculate sales commission earned from revenue at any flat, tiered, or percentage rate.

Calculate interest earned or owed on a principal at a fixed annual rate.

Calculate your semester or cumulative GPA from course grades and credit hours.

Calculate the percentage increase or decrease between any two values.

Calculate the probability of single or multiple events occurring using simple inputs.

Calculate the area and perimeter of rectangles, circles, triangles, and trapezoids with unit conversions.