Math

Free online percentage calculator. Calculate percentages, find percent of numbers, percentage change, and convert between percent, fraction, and decimal.

Calculate variance and standard deviation

Precise calculation in fraction form

Calculate the nth power of any number

Calculate square root/cube root/nth root

Calculate logarithm values with any base

Calculate growth rate and rate of change online

Calculate the percentage difference between two values

Quickly calculate percentage values, percentage increase/decrease results

Calculate the result after decreasing a value by a specific percentage, automatically computing the decrease amount and final value

Calculate the result after increasing the original value by a specified percentage, automatically computing the increase amount and final value

Calculate the growth amount and growth rate from the original value to the new value, automatically determining growth/decline type with detailed calculation steps

Quickly convert percentages to simplified fractions and decimal forms, supporting integer percentages and decimal percentages (e.g., 37.5%), automatically simplifying numerator and denominator with detailed conversion steps

Quickly calculate the ratio relationship between two numbers, automatically finding the greatest common divisor to obtain the simplest integer ratio, supporting integers and decimals with precise ratio values and detailed calculation steps

Quickly calculate the standard deviation, mean, and variance of a data set, measuring data dispersion. Supports sample standard deviation and population standard deviation, suitable for statistical analysis, quality control, and investment risk assessment

Quickly convert any number to standard form, scientific notation, and engineering notation. Supports regular numbers and e-notation input, providing detailed conversion results and comparison of the three notation types

Quickly calculate the total volume of cylindrical, spherical, and rectangular tanks. Automatically converts between cubic meters, liters, and gallons. Suitable for oil tank, water tank, and chemical container volume estimation scenarios

Calculate function derivatives at specific points using numerical methods. Supports precise differentiation of power, trigonometric, exponential, and logarithmic functions. Provides function values and derivative results with differentiation rule explanations

Quickly calculate the reciprocal of any non-zero number. Supports positive/negative numbers, integers, and decimals. Provides product verification and detailed calculation steps to help understand reciprocal mathematical properties

Quickly calculate equivalent forms of fractions. Supports positive/negative fractions, mixed numbers, integers, proper and improper fractions. Provides decimal representation and lists of equivalent fractions to help understand proportional relationships and fraction reduction principles

Quickly calculate the harmonic mean of a set of positive numbers. Commonly used for average speed, parallel resistance, average rate calculations. Supports comma-separated input, automatically filters invalid data, and provides detailed calculation steps with formula explanations

Quickly calculate kinetic energy, mass, or velocity using the KE = ½mv² formula. Supports three calculation modes with detailed steps and physics principle explanations. Suitable for physics education, engineering mechanics, and motion analysis scenarios

Quickly calculate common logarithms (base 10), natural logarithms (base e), and logarithms with any positive base. Supports custom base selection, results accurate to 10 decimal places, with detailed calculation steps and logarithm property explanations. Suitable for mathematics, science, engineering, and financial calculations

Online solver for quadratic equations ax² + bx + c = 0. Supports real and complex roots, automatically calculates discriminant Δ and provides detailed solution steps. Suitable for math learning, physics problems, engineering design, and financial analysis scenarios

Online fraction addition and subtraction calculator. Supports adding or subtracting multiple fractions, automatic common denominator and reduction with decimal results. Suitable for student math learning, recipe adjustment, woodworking measurements, and financial ratio calculations

Online binary calculator supporting binary-decimal conversion, binary addition, subtraction, multiplication, and division operations. Provides detailed calculation steps and result analysis. Suitable for programming learning, network configuration, computer organization principles, and bit operation optimization scenarios

在线计算反正弦/反余弦/反正切，支持角度弧度单位

在线计算样本/总体方差、标准差和变异系数

在线分数加减乘除运算，自动化简并转小数

快速将分数转换为百分比和小数并约分提示

分数转小数和百分比，支持自定义位数

在线复数加减乘除运算，自动计算模和幅角

在线排列组合与古典概率计算，详细步骤解释

根据a²+b²=c²快速计算直角三角形边长

混合数加减乘除运算，转换为带分数和小数

快速计算水泥沙子碎石和水的用量配比