Math Tools Tools
Mathematics, statistics, and probability tools
Percentage Calculator
Calculate percentages easily. Instantly compute ratios, rate of change, and percent values.
Split Bill Calculator
Easily split bills for dining and parties. Instantly calculate per-person amount.
Random Number Generator
Generate random numbers within a specified range. Customize count, decimal places, and duplicate control.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal. Also supports custom base conversion (base 2 to 36).
GPA Calculator
Calculate your GPA (Grade Point Average) from course grades. Supports credit-weighted calculations.
Ratio Calculator
Calculate, simplify, and solve ratios. Solve for unknown values in A:B = C:D proportions.
Fraction Calculator
Perform arithmetic operations on fractions (add, subtract, multiply, divide). Automatic common denominator and simplification.
GCD & LCM Calculator
Calculate the greatest common divisor and least common multiple of two or more integers. Supports multiple numbers at once.
Prime Factorization Calculator
Factorize integers into prime factors. Also supports primality testing and divisor enumeration.
Factorial Calculator
Calculate factorials (n!). Handles large factorials with high precision.
Exponent Calculator
Calculate exponents (powers). Compute x^n with high precision.
Square Root & Nth Root Calculator
Calculate square roots, cube roots, and nth roots in one tool. Customize the root degree and view a common square roots table.
Logarithm Calculator
Calculate common logarithms, natural logarithms, and logarithms with any base. Supports log₁₀, ln, and custom base with a log table included.
Permutation Calculator
Calculate permutations (nPr) — the number of ways to arrange r items from n. Displays the formula and handles large numbers.
Combination Calculator
Calculate combinations (nCr) for choosing r items from n. View calculation steps and visualize with Pascal's triangle.
Probability Calculator
Calculate event probability as fractions, decimals, and percentages. Supports AND/OR compound events and complement calculations.
Mean, Median & Mode Calculator
Calculate mean, median, and mode of a data set at once. Also displays range, sum, count, and sorted data.
Standard Deviation Calculator
Calculate standard deviation and variance to measure data spread. Supports both population and sample calculations with step-by-step details.
Standard Score Calculator
Calculate standard scores (deviation values) from test scores. View percentile rankings and batch calculations.
Quadratic Equation Calculator
Solve quadratic equations (ax²+bx+c=0) by entering coefficients. Classifies solutions by discriminant with step-by-step calculations and graph plotting.
System of Equations Solver
Solve systems of 2 or 3 linear equations automatically. Shows step-by-step solutions and handles no-solution or infinite-solution cases.
Trigonometry Calculator
Calculate sin, cos, tan, and other trigonometric function values. Supports degree/radian modes, inverse functions, and hyperbolic functions.
Pythagorean Theorem Calculator
Calculate the missing side of a right triangle using the Pythagorean theorem. Solve for any side with diagram and step-by-step formula display.
Scientific Calculator
A full-featured calculator with trigonometric, logarithmic, and exponential functions. Includes calculation history, memory functions, and keyboard input support.
Online Calculator
A web-based calculator for basic arithmetic and percentage calculations. Optimized for both touchscreen and keyboard numpad input.
Matrix Calculator
Calculate matrix addition, subtraction, multiplication, determinant, inverse, and transpose. Supports up to 10x10 matrices with step-by-step row operations.
Vector Calculator
Calculate dot product, cross product, magnitude, and angle between vectors. Supports 2D and 3D vectors with visual graph display.
Complex Number Calculator
Perform arithmetic, modulus, and argument calculations on complex numbers. Supports polar form conversion and complex plane visualization.
Z-Score Calculator
Calculate Z-scores (standard scores) and visualize position on the normal distribution. Also computes percentiles and probabilities.
Weighted Average Calculator
Calculate weighted averages by assigning weights to each item. Great for grade calculations and score aggregation.
Expected Value Calculator
Calculate expected values (mean) from probability distributions. Ideal for gambling odds and investment decision simulations.
Modulo Calculator
Instantly calculate the remainder of division (mod operation). Handles negative numbers and large values.
Scientific Notation Converter
Convert between standard numbers and scientific notation. Useful for working with very large or very small values.
Decimal to Fraction Converter
Convert decimals to fractions and fractions to decimals. Automatically simplifies and converts to mixed numbers.
Fibonacci Sequence Generator
Generate the Fibonacci sequence up to a specified number of terms. Useful for math study and test data generation.
Prime Number Checker & Generator
Instantly determine if a number is prime. Also generate a list of primes within a specified range.
Dog Age Calculator
Convert your dog's age to human years. Calculations account for breed size differences.
Cat Age Calculator
Convert your cat's age to human years. View care guidelines for each life stage.
Tip Calculator
Calculate tip amounts and split bills per person. Perfect for dining out and group payments.
Slope Calculator
Calculate the slope and equation of a line from two points. Also computes the y-intercept and distance between points.
Circle & Sphere Calculator
Calculate area, circumference, volume, and surface area for circles and spheres. Compute from either radius or diameter.
Triangle Calculator
Calculate sides, angles, area, and perimeter of triangles. Supports right, isosceles, equilateral, and scalene triangles.
Trapezoid Area Calculator
Calculate trapezoid area and perimeter from parallel sides and height. Also computes leg lengths and diagonals.
Shape Area Calculator
Calculate the area of various shapes including rectangles, pentagons, hexagons, and ellipses. Simply enter side lengths or radii to get results.
3D Shape Volume Calculator
Calculate the volume of various 3D shapes including rectangular prisms, cylinders, cones, and pyramids. Surface area is also calculated.
Aspect Ratio Calculator
Calculate and convert aspect ratios for images and videos. Automatically compute width and height when resizing.
Number Sequence Generator
Generate arithmetic, geometric, Fibonacci, and other number sequences. Useful for test data and learning purposes.
Number Sorter & Filter
Sort number lists in ascending or descending order and filter by conditions. Also supports duplicate removal and range filtering.
Gradient / Slope Calculator
Calculate gradient, slope angle, and percent grade from rise and run. Useful for road design and ramp planning.
Scale Calculator
Calculate actual dimensions from map or drawing scales. Also supports scale ratio conversion and reverse distance calculation.
100-Grid Math Drill
A 10×10 grid math drill tool to practice arithmetic skills. A popular calculation training method widely used in Japanese education.
Rounding Calculator
View round half up, ceiling, and floor results at once. Specify decimal places and compare rounding methods side by side.
Significant Figures Calculator
Automatically determine the number of significant figures and round results correctly. Essential for chemistry and physics lab reports.
Golden Ratio Calculator
Calculate lengths and ratios based on the golden ratio (1:1.618). Useful for design and layout dimension planning.
Normal Distribution Calculator
Calculate probability, CDF, and percentile for normal distributions. Just enter mean and standard deviation to see the distribution graph.
Binomial Distribution Calculator
Calculate probability, expected value, and variance for binomial distributions. Determine statistics from the number of trials and success probability.
Confidence Interval Calculator
Statistically calculate confidence intervals for means and proportions. Specify sample size and confidence level to perform interval estimation.
Regression Analysis Tool
Automatically calculate and visualize regression lines and curves from data. Useful for checking R-squared and regression equations.
Correlation Coefficient Calculator
Calculate Pearson and Spearman correlation coefficients between two data sets. Visualize data relationships with a scatter plot.
Percentile Calculator
Calculate any percentile value from a data set. Also useful for finding quartiles and medians.
Variance Calculator
Calculate variance, standard deviation, and coefficient of variation at once. View both population and sample results simultaneously.
Force & Acceleration Calculator
Calculate force, mass, or acceleration using Newton's second law (F=ma). Enter any two values to automatically solve for the third.
Kinetic Energy Calculator
Calculate kinetic energy from an object's mass and velocity. Supports unit conversion and reverse calculation for physics problems.
Work & Power Calculator
Calculate work and power from force, distance, and time. Perfect for physics problem-solving and energy calculations.
Ohm's Law Calculator
Calculate voltage, current, resistance, and power based on Ohm's Law (V=IR).
Tile Calculator
Calculate the number of tiles needed based on room and tile dimensions. Includes waste factor for accurate ordering estimates.
Concrete Calculator
Calculate the amount of concrete needed from project dimensions. Specify thickness and shape to determine volume and weight.
Wallpaper Calculator
Calculate the number of wallpaper rolls needed from room dimensions. Accurately deducts window and door areas for precise estimates.
Flooring Calculator
Calculate the amount of flooring material needed from room dimensions. Includes waste factor for accurate ordering estimates.
Momentum Calculator
Calculate momentum (p=mv) from an object's mass and velocity. Supports unit switching and reverse calculation from momentum.
Potential Energy Calculator
Calculate gravitational potential energy (U=mgh) from mass, height, and gravity. Supports calculations for other planets like the Moon and Mars.
Density Calculator
Calculate density (ρ=m/V) from mass and volume. Supports reverse calculation and comparison with common materials.
Resistor Color Code Calculator
Read resistance values from resistor color bands. Also supports reverse lookup from resistance value to color code.
Force Unit Converter
Convert between force units like Newton, Dyne, and kilogram-force. All unit conversions are displayed instantly as you type.
Frequency Unit Converter
Convert between frequency units like Hz, kHz, MHz, and GHz. Also supports period (seconds) and RPM conversion.
Density Unit Converter
Convert between density units like kg/m³, g/cm³, and lb/ft³. Includes reference densities for common materials.
Electric Current Unit Converter
Convert between electric current units like Ampere, Milliampere, and Microampere. Supports scientific notation for very small and large values.
Fuel Economy Converter
Convert between fuel economy units like km/L, L/100km, and MPG. Also calculates fuel cost from economy and distance.
GPS Coordinate Converter
Convert between GPS coordinate formats: DMS, decimal degrees, and degrees-minutes. Instantly converts any format to all others.
Biorhythm Calculator
Calculate your physical, emotional, and intellectual biorhythm cycles from your date of birth. View wave graphs to identify peak and critical days.