Math Calculators

Free online math calculators for averages, statistics, percentages, and everyday number crunching.

Acreage Calculator

Find the area of a rectangular plot of land in acres, hectares, square feet, or any other unit. Enter width and length — the area updates instantly.

Area of a Circle Calculator

Calculate the area of a circle from its radius, diameter, or area. Enter any one value and the other two update instantly.

Area of a Rectangle Calculator

Calculate the area, perimeter, and diagonal of a rectangle. Enter any two values and the rest update instantly.

Average Calculator

Find the mean, median, mode, range, sum, and more for any list of numbers. Enter values separated by commas or spaces.

Circumference Calculator

Calculate the circumference, diameter, radius, or area of any circle — enter any one value and all three others update instantly.

Cylinder Volume Calculator

Calculate the volume of a cylinder by entering the radius (or diameter) and height. Results appear instantly in cubic feet, cubic yards, cubic meters, and liters.

Exponent Calculator

Calculate any power instantly — enter a base and exponent to get the result and a full step-by-step solution.

Factor Calculator

Find all factors of any positive integer instantly — enter a number to get its complete factor list, factor pairs, and prime factorization.

Fraction Calculator

Add, subtract, multiply, or divide fractions and mixed numbers with a step-by-step solution. Simplify any fraction or convert it to a decimal.

Mean Calculator

Calculate the arithmetic, geometric, and harmonic mean of any list of numbers — all three at once, instantly.

Percentage Calculator

Calculate percentages instantly — find what percent of a number is, determine what percentage one value is of another, or find the percentage change between two numbers.

Calculate the percentage change between two values. Enter any two of three fields — starting value, ending value, or percentage change — and the third is computed automatically. The result is signed: positive for an increase, negative for a decrease.

Percentage Decrease Calculator

Calculate the percentage decrease between two values, or find the original or final value when you know the percentage. Enter any two of three fields and the third is computed automatically.

Percentage Difference Calculator

Calculate the percentage difference between two values, or switch to Percentage Change mode to find the relative increase or decrease from an old value to a new one. Any two of three fields can be filled — the third is computed automatically.

Percentage Increase Calculator

Calculate the percentage increase or decrease between two values. Enter any two of three fields — initial value, final value, or percentage — and the third is computed automatically.

Percentage of a Percentage Calculator

Calculate a percentage of another percentage — find the result, work backwards to find the base, or find what percentage one value is of another.

Power of a Power Calculator

Apply the power of a power rule instantly — enter a base and two exponents to compute (xᵐ)ⁿ = x^(m·n) with a step-by-step solution.

Pythagorean Theorem Calculator

Calculate any side of a right triangle using the Pythagorean theorem. Enter any two sides and get the third instantly, along with both angles, area, and perimeter.

Root Calculator

Calculate the nth root of any number instantly — enter a value and a root degree to get the result and a step-by-step solution.

Scientific Notation Calculator

Convert any number to scientific, E-notation, engineering, and decimal formats — or perform arithmetic on two numbers and see the result in all four.

Speed Calculator

Calculate speed, distance, or time. Enter any two values and the third is computed instantly. Supports metric, imperial, and nautical units.

Square Root Calculator

Calculate the square root of any number instantly, or work backwards from a square root to find the original number. Enter either value and get the result on the fly.

30-60-90 Triangle Calculator

Calculate the short leg, long leg, hypotenuse, area, and perimeter of a 30-60-90 triangle. Enter any one value and all others update instantly.

45-45-90 Triangle Calculator

Calculate the leg, hypotenuse, area, and perimeter of a 45-45-90 triangle. Enter any one value and all others update instantly.

About Math Calculators

Math calculators on EasyCalc are built for practical, everyday use — the kinds of problems that come up in school, work, data analysis, and daily life. No advanced mathematics required: enter your numbers, click Calculate, and get a clear result with the key statistics shown at a glance.

What You Can Calculate

Averages — find the mean, median, and mode of any set of numbers
Statistics — see the range, minimum, maximum, and total alongside the average
Percentages — coming soon
And more — new calculators are added regularly

Why Use an Online Calculator

Online calculators are faster than spreadsheet formulas for quick one-off calculations, and more reliable than doing the math in your head. They work the same way on any device — phone, tablet, or computer — with no installation needed.

Frequently Asked Questions

What kinds of math can I do with these calculators?

The calculators cover practical everyday math: finding averages and statistical measures like median and mode, working with percentages, and other common calculations you'd normally reach for a spreadsheet or app to solve.

Are these calculators free?

Yes. Every calculator on EasyCalc is free to use with no sign-up, no download, and no usage limits.

Do the calculators handle decimal numbers?

Yes. All math calculators accept decimal numbers such as 3.14, 0.5, or 99.99. Just use a period as the decimal separator.

How accurate are the results?

Results are calculated using standard floating-point arithmetic and are accurate to at least 10 significant figures for typical inputs. For very large or very precise calculations, scientific notation is used to avoid display errors.