Universal Math Calculator

Solve percentages, geometry, averages, and ratios in one place.

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Percentage Calculator

Easily find the percentage of a number or calculate percentage change.

What is
% of
?
is what % of
?
0
Result

Area & Geometry

Calculate the Area of a Circle, Triangle, or Rectangle instantly.

0
Area (Square Units)

Average (Mean) Calculator

Calculate the mathematical mean of a dataset.

0
Average
0
Sum
0
Count

Ratio Solver

Solve for X in any ratio equation (Proportions).

A : B = C : X

:
=
Value of X

Discount Calculator

Calculate final price after % off.

You Save
0.00
Final Price
0.00

Other Useful Calculators

Age Calculator
Mortgage Calculator
Aspect Ratio Calculator
Word Counter

The Ultimate Math Cheat Sheet

Whether you are a student doing homework, a shopper looking for sales, or a contractor measuring a room, having the right formulas at hand is essential. Here is how our calculators work behind the scenes.

Percentage Formulas

Find the Percentage: (Part / Total) × 100
Example: 40/50 = 0.8 -> 80%

Find the Part: (Total × Percentage) / 100
Example: (500 × 20) / 100 = 100

Geometry Formulas

  • Circle Area: A = πr² (Radius squared times 3.14)
  • Rectangle Area: A = Length × Width
  • Triangle Area: A = ½ (Base × Height)

Real World Applications

Cooking (Ratios)

Use the Ratio Solver to scale recipes up or down. If a recipe needs 2 cups of flour for 3 people, how much for 10 people?

Shopping (Discounts)

Use the Discount Calculator during sales events like Black Friday to quickly see the final price tag.

Construction (Area)

Contractors use the Area Calculator to determine how much paint, carpet, or tile is needed for a room.

Math Calculator FAQ

To find the percentage difference between two numbers, take the absolute difference between them, divide it by the average of the two numbers, and multiply by 100.

The area of a circle is calculated using the formula A = πr², where 'r' is the radius of the circle and π (pi) is approximately 3.14159.