Math

Percentage calculator tool supporting common scenarios like percentage increase/decrease and discounts.

Enter a set of numbers to quickly calculate the arithmetic mean, sum, and count.

Free online fraction simplifier. Enter the numerator and denominator to instantly reduce fractions to their simplest form and see the step-by-step GCD calculation process.

Quickly calculate how to make 24 from four numbers using basic math operations.

Input three point coordinates to quickly find the parabola's standard form, vertex coordinates, and axis of symmetry.

Accurately calculate your average running pace and split times based on your distance and time.

Calculate the square of any number, including integers, decimals, and negative numbers. Ideal for math learning and engineering calculations.

Fix map offset issues and easily convert between WGS84, GCJ02, and BD09 coordinate systems. Ideal for developers and geographic data processing.

Enter the side length of a regular hexagon to instantly calculate its exact area. Supports various numerical inputs, ideal for math students and engineering tasks.

Calculate the nth root of any real number. Supports integer and decimal exponents, perfect for students and engineering professionals.

Free online fraction calculator to quickly add, subtract, multiply, and divide fractions. Easily simplify fractions and convert mixed numbers.

Enter the average rate (λ) and number of events (k) to quickly calculate the exact Poisson probability P(X=k) and cumulative probabilities.

Batch convert coordinates between WGS84, GCJ02, and BD09 online. Supports text paste and Excel upload with easy data export.

An online t-test calculator that quickly tells whether the difference between two group means is significant — enter the means, standard deviations, and sample sizes to get the t-value and p-value.

Quickly calculate the weighted average by entering values and their corresponding weights. Supports unlimited data sets.

Quickly calculate the recommended TV size range based on your viewing distance and resolution.

Input display resolution and diagonal size to instantly calculate PPI, total pixels, and dot pitch.

Quickly calculate the linear interpolation result of an intermediate point based on two known coordinates.

Enter any two sides of a right triangle to instantly calculate the length of the third side.

Input TV diagonal inches, instantly calculate screen width, height, area and recommended viewing distance.