Universal Math Calculator
Solve percentages, geometry, averages, and ratios in one place.
Percentage Calculator
Easily find the percentage of a number or calculate percentage change.
How to Calculate Percentage
The percentage formula is one of the most used math equations in daily life. To find the percentage of a number, use the formula:
(Part / Total) × 100 = Percentage. For example, if you scored 40 out of 50 on a test, your percentage is (40 ÷ 50) × 100 = 80%.
Area & Geometry Calculator
Calculate the Area of a Circle, Triangle, or Rectangle instantly.
Area Formulas Explained
- Area of a Circle: The formula is
A = πr²(Pi times radius squared). - Area of a Triangle: The formula is
A = ½(b × h)(Half of base times height). - Area of a Rectangle: The formula is
A = l × w(Length times Width).
Average (Mean) Calculator
Calculate the mathematical mean of a dataset.
How to Calculate Average
The "Average" (or Arithmetic Mean) is calculated by adding all numbers in a set and dividing by the count of numbers. For example, the average of 2, 4, and 9 is (2+4+9) ÷ 3 = 5.
Ratio Solver (Proportions)
Solve for X in any ratio equation.
A : B = C : X
Solving Ratios for X
To solve a ratio like A/B = C/X, you use cross-multiplication. The formula to find X is: X = (B × C) / A. This is widely used in chemistry, cooking, and resizing images.
Discount & Sale Price Calculator
Calculate final price after % off.
Discount Calculation Formula
To find the discounted price, multiply the original price by the discount percentage to get the savings. Then subtract the savings from the original price.