Math

Average Calculator

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

Nth Root Calculator

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

Printable Multiplication Table

Generate and download a free high-resolution 1-9 multiplication table chart for easy printing.

24 Game Calculator

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

Online Stopwatch Timer

Free online stopwatch timer with no download required. Features one-click start/stop, lap tracking, and easy time copying.

T-Test Calculator

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.

Fraction Calculator

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

Yu'e Bao Earnings Calculator

Enter principal, annual yield rate, and days to quickly calculate expected returns for Alipay Yuebao

Chinese Zodiac Lookup

Enter your Gregorian birth date or year to instantly discover your Chinese zodiac sign, heavenly stems & earthly branches, and five element attribute.

Linear Interpolation Calculator

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

Chinese Gender Predictor Chart (2026)

Predict your baby's gender in 2026 using the traditional Chinese Gender Chart. Simply enter the mother's lunar age and conception month. For entertainment purposes only, not scientifically proven.

System of Linear Equations Calculator

Enter two linear equations to instantly solve for x and y. Free online calculator with step-by-step solutions.

Online Text Formatting Tool

Automatically handle first-line indents, clean up extra blank lines and spaces, and unify punctuation for clean, well-formatted text.

Cube Calculator

Calculate the 3rd power (cube) of any real number online. Ideal for math learning and engineering calculations.

Current Unit Converter

Quickly and accurately convert current units like amps and milliamps.

PPI Calculator

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

Vertical Text Converter

Convert horizontal text into traditional vertical layout, great for calligraphy, classical Chinese, and poster design.

Water Density Calculator

Calculate water density instantly by entering temperature and salinity. Get accurate results in kg/m³ or g/cm³.

Scientific Notation Converter

Fast and free online scientific notation converter. Easily convert between scientific notation and standard numbers with customizable precision and significant figures.

Greek Alphabet Reference

Quickly query 24 Greek letters with uppercase, lowercase, pronunciation, and common usage scenarios.