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Math & Calculators

Calculate percentages, solve equations, convert units, and crunch numbers.

78 tools

Percentage Calculator - free online tool

Percentage Calculator

Calculate percentages, percentage change, and what percent one number is of another.

๐Ÿ”ข Math & Calculators
Fraction Calculator - free online tool

Fraction Calculator

Add, subtract, multiply, and divide fractions with automatic simplification.

๐Ÿ”ข Math & Calculators
Scientific Calculator - free online tool

Scientific Calculator

Full-featured scientific calculator with trigonometry, logarithms, factorials, and more.

๐Ÿ”ข Math & Calculators
Matrix Calculator - free online tool

Matrix Calculator

Perform matrix operations: add, multiply, find determinant, inverse, and transpose for 2ร—2 and 3ร—3 matrices.

๐Ÿ”ข Math & Calculators
Quadratic Equation Solver - free online tool

Quadratic Equation Solver

Solve quadratic equations (axยฒ + bx + c = 0) and find roots, discriminant, and vertex.

๐Ÿ”ข Math & Calculators
Exponent Calculator - free online tool

Exponent Calculator

Calculate x raised to the power of n (xโฟ) with scientific notation output.

๐Ÿ”ข Math & Calculators
Factorial Calculator - free online tool

Factorial Calculator

Calculate the factorial of any number (n!) with digit count and expansion.

๐Ÿ”ข Math & Calculators
GCD & LCM Calculator - free online tool

GCD & LCM Calculator

Find the Greatest Common Divisor and Least Common Multiple of two or more numbers.

๐Ÿ”ข Math & Calculators
Prime Number Checker - free online tool

Prime Number Checker

Check if a number is prime and find its factors and nearest primes.

๐Ÿ”ข Math & Calculators
Prime Factorization - free online tool

Prime Factorization

Find the prime factors of any number with expanded form and divisor count.

๐Ÿ”ข Math & Calculators
Fibonacci Calculator - free online tool

Fibonacci Calculator

Generate the Fibonacci sequence up to N terms with exact BigInt precision.

๐Ÿ”ข Math & Calculators
Standard Deviation Calculator - free online tool

Standard Deviation Calculator

Calculate population or sample standard deviation, variance, mean, and range of a dataset.

๐Ÿ”ข Math & Calculators
Mean, Median & Mode Calculator - free online tool

Mean, Median & Mode Calculator

Calculate mean, median, mode, range, and other central tendency measures for any dataset.

๐Ÿ”ข Math & Calculators
Probability Calculator - free online tool

Probability Calculator

Calculate simple probability, union, intersection, conditional probability, and complement.

๐Ÿ”ข Math & Calculators
Permutation Calculator (nPr) - free online tool

Permutation Calculator (nPr)

Calculate the number of permutations (ordered arrangements) of n items taken r at a time.

๐Ÿ”ข Math & Calculators
Combination Calculator (nCr) - free online tool

Combination Calculator (nCr)

Calculate combinations (unordered selections) with or without repetition.

๐Ÿ”ข Math & Calculators
Binary Calculator - free online tool

Binary Calculator

Perform binary arithmetic and bitwise operations (AND, OR, XOR, NOT).

๐Ÿ”ข Math & Calculators
Hexadecimal Calculator - free online tool

Hexadecimal Calculator

Perform hexadecimal arithmetic and bitwise operations with multi-base output.

๐Ÿ”ข Math & Calculators
Octal Calculator - free online tool

Octal Calculator

Perform octal (base-8) arithmetic with decimal, binary, and hex conversions.

๐Ÿ”ข Math & Calculators
Number Base Converter - free online tool

Number Base Converter

Convert numbers between any bases from 2 to 36, including binary, octal, decimal, and hex.

๐Ÿ”ข Math & Calculators
Mortgage Calculator - free online tool

Mortgage Calculator

Calculate monthly mortgage payments, total interest, and view amortization schedule.

๐Ÿ”ข Math & Calculators
Loan EMI Calculator - free online tool

Loan EMI Calculator

Calculate Equated Monthly Installment (EMI) for any loan with year-by-year breakdown.

๐Ÿ”ข Math & Calculators
Compound Interest Calculator - free online tool

Compound Interest Calculator

Calculate compound interest with different frequencies and regular contributions.

๐Ÿ”ข Math & Calculators
Simple Interest Calculator - free online tool

Simple Interest Calculator

Calculate simple interest with flexible time period units (years, months, days).

๐Ÿ”ข Math & Calculators
ROI Calculator - free online tool

ROI Calculator

Calculate return on investment (ROI) with optional annualized ROI for time-based comparison.

๐Ÿ”ข Math & Calculators
Break-Even Calculator - free online tool

Break-Even Calculator

Calculate break-even point in units and revenue with profit/loss projections.

๐Ÿ”ข Math & Calculators
Profit Margin Calculator - free online tool

Profit Margin Calculator

Calculate gross margin, net margin, and markup percentage from revenue and costs.

๐Ÿ”ข Math & Calculators
Discount Calculator - free online tool

Discount Calculator

Calculate discount amount and final price from percentage or fixed discounts.

๐Ÿ”ข Math & Calculators
Sales Tax Calculator - free online tool

Sales Tax Calculator

Calculate sales tax amount and total price, or extract tax from a tax-inclusive amount.

๐Ÿ”ข Math & Calculators
VAT Calculator - free online tool

VAT Calculator

Calculate VAT inclusive/exclusive amounts with preset rates for popular countries.

๐Ÿ”ข Math & Calculators
Tip Calculator - free online tool

Tip Calculator

Calculate tip amount and total with bill splitting for any number of people.

๐Ÿ”ข Math & Calculators
Bill Splitter - free online tool

Bill Splitter

Split restaurant bills among multiple people with tax and tip included.

๐Ÿ”ข Math & Calculators
Currency Converter - free online tool

Currency Converter

Convert between 30+ world currencies with approximate exchange rates.

๐Ÿ”ข Math & Calculators
Salary Calculator - free online tool

Salary Calculator

Convert salary between hourly, daily, weekly, bi-weekly, monthly, and annual rates.

๐Ÿ”ข Math & Calculators
Paycheck Calculator - free online tool

Paycheck Calculator

Estimate take-home pay with federal tax, state tax, Social Security, and Medicare deductions.

๐Ÿ”ข Math & Calculators
Investment Return Calculator - free online tool

Investment Return Calculator

Project future investment value with initial investment and regular monthly contributions.

๐Ÿ”ข Math & Calculators
Retirement Calculator - free online tool

Retirement Calculator

Project retirement savings and check if you're on track using the 4% rule.

๐Ÿ”ข Math & Calculators
Savings Goal Calculator - free online tool

Savings Goal Calculator

Calculate the monthly savings needed to reach a financial goal within a time frame.

๐Ÿ”ข Math & Calculators
Debt Payoff Calculator - free online tool

Debt Payoff Calculator

Plan debt payoff with snowball vs avalanche strategies and extra payment analysis.

๐Ÿ”ข Math & Calculators
APR Calculator - free online tool

APR Calculator

Calculate the Annual Percentage Rate including fees and charges for true loan cost comparison.

๐Ÿ”ข Math & Calculators
BMI Calculator - free online tool

BMI Calculator

Calculate your Body Mass Index based on height and weight with metric and imperial units.

๐Ÿ”ข Math & Calculators
BMR Calculator - free online tool

BMR Calculator

Calculate your Basal Metabolic Rate using Mifflin-St Jeor and Harris-Benedict equations.

๐Ÿ”ข Math & Calculators
TDEE Calculator - free online tool

TDEE Calculator

Calculate Total Daily Energy Expenditure based on BMR and activity level for weight management.

๐Ÿ”ข Math & Calculators
Calorie Calculator - free online tool

Calorie Calculator

Calculate daily calorie needs with macro breakdown for weight loss, maintenance, or muscle gain.

๐Ÿ”ข Math & Calculators
Body Fat Calculator - free online tool

Body Fat Calculator

Estimate body fat percentage using the US Navy method with waist, neck, and hip measurements.

๐Ÿ”ข Math & Calculators
Ideal Weight Calculator - free online tool

Ideal Weight Calculator

Calculate ideal body weight using Robinson, Miller, Devine, and Hamwi formulas plus BMI range.

๐Ÿ”ข Math & Calculators
Pace Calculator - free online tool

Pace Calculator

Calculate running pace, finish time, or distance for training and race planning.

๐Ÿ”ข Math & Calculators
Blood Alcohol Calculator - free online tool

Blood Alcohol Calculator

Estimate Blood Alcohol Concentration (BAC) based on drinks, weight, sex, and time elapsed.

๐Ÿ”ข Math & Calculators
Pregnancy Due Date Calculator - free online tool

Pregnancy Due Date Calculator

Calculate estimated due date from last period, conception date, or IVF transfer with progress tracking.

๐Ÿ”ข Math & Calculators
Age Difference Calculator - free online tool

Age Difference Calculator

Calculate the exact age difference between two people in years, months, days, weeks, and hours.

๐Ÿ”ข Math & Calculators
Dog Age Calculator - free online tool

Dog Age Calculator

Convert dog years to human years using size-adjusted calculations based on AKC guidelines.

๐Ÿ”ข Math & Calculators
GPA Calculator - free online tool

GPA Calculator

Calculate your GPA on a 4.0 scale with support for multiple courses, credits, and letter grades.

๐Ÿ”ข Math & Calculators
Grade Calculator - free online tool

Grade Calculator

Calculate final grades from weighted scores or find the score needed on a final exam.

๐Ÿ”ข Math & Calculators
Weighted Average Calculator - free online tool

Weighted Average Calculator

Calculate weighted averages with dynamic data entry, showing both weighted and simple averages.

๐Ÿ”ข Math & Calculators
Sample Size Calculator - free online tool

Sample Size Calculator

Calculate required sample size for surveys based on confidence level, margin of error, and population.

๐Ÿ”ข Math & Calculators
Confidence Interval Calculator - free online tool

Confidence Interval Calculator

Calculate confidence intervals from summary statistics or raw data with multiple confidence levels.

๐Ÿ”ข Math & Calculators
Z-Score Calculator - free online tool

Z-Score Calculator

Calculate Z-scores and percentiles, or find values from Z-scores using the standard normal distribution.

๐Ÿ”ข Math & Calculators
P-Value Calculator - free online tool

P-Value Calculator

Calculate p-values from Z or t test statistics with one-tailed and two-tailed options.

๐Ÿ”ข Math & Calculators
Correlation Calculator - free online tool

Correlation Calculator

Calculate Pearson and Spearman correlation coefficients with R-squared interpretation.

๐Ÿ”ข Math & Calculators
Linear Regression Calculator - free online tool

Linear Regression Calculator

Perform linear regression to find the best-fit line equation with prediction capability.

๐Ÿ”ข Math & Calculators
Ohm's Law Calculator - free online tool

Ohm's Law Calculator

Calculate voltage, current, resistance, or power using Ohm's Law and the power equation.

๐Ÿ”ข Math & Calculators
Resistor Color Code Calculator - free online tool

Resistor Color Code Calculator

Decode resistor values from color bands with visual selector for 4-band and 5-band resistors.

๐Ÿ”ข Math & Calculators
Voltage Divider Calculator - free online tool

Voltage Divider Calculator

Calculate output voltage or required resistor value for voltage divider circuits.

๐Ÿ”ข Math & Calculators
Fuel Cost Calculator - free online tool

Fuel Cost Calculator

Calculate fuel cost for any trip based on distance, fuel efficiency, and fuel price.

๐Ÿ”ข Math & Calculators
Cooking Measurement Converter - free online tool

Cooking Measurement Converter

Convert between cooking volume and weight measurements โ€” teaspoons, cups, ounces, grams, and more.

๐Ÿ”ข Math & Calculators
Recipe Scaler - free online tool

Recipe Scaler

Scale recipe ingredients up or down by changing the number of servings with fraction display.

๐Ÿ”ข Math & Calculators
Aspect Ratio Calculator - free online tool

Aspect Ratio Calculator

Calculate aspect ratios from dimensions and resize images/videos while maintaining proportions.

๐Ÿ”ข Math & Calculators
PPI/DPI Calculator - free online tool

PPI/DPI Calculator

Calculate pixel density (PPI/DPI) from screen resolution and physical size.

๐Ÿ”ข Math & Calculators
Screen Size Calculator - free online tool

Screen Size Calculator

Calculate physical screen dimensions from diagonal size and aspect ratio, or diagonal from width and height.

๐Ÿ”ข Math & Calculators
Bandwidth Calculator - free online tool

Bandwidth Calculator

Convert between bandwidth and data rate units โ€” bps, Kbps, Mbps, Gbps, MB/s, and more.

๐Ÿ”ข Math & Calculators
Download Time Calculator - free online tool

Download Time Calculator

Calculate how long a file download will take based on file size and connection speed.

๐Ÿ”ข Math & Calculators
Subnet Calculator - free online tool

Subnet Calculator

Calculate subnet details from IP address and CIDR prefix โ€” network, broadcast, host range, and mask.

๐Ÿ”ข Math & Calculators
IP Range Calculator - free online tool

IP Range Calculator

Convert between IP address ranges and CIDR notation, showing total addresses and range details.

๐Ÿ”ข Math & Calculators
Roman Numeral Calculator - free online tool

Roman Numeral Calculator

Convert between decimal numbers and Roman numerals (1โ€“3999) with a reference chart.

๐Ÿ”ข Math & Calculators
Scientific Notation Converter - free online tool

Scientific Notation Converter

Convert between decimal and scientific notation, with E-notation display and arithmetic operations.

๐Ÿ”ข Math & Calculators
Logarithm Calculator - free online tool

Logarithm Calculator

Calculate logarithms in any base (natural log, logโ‚โ‚€, logโ‚‚, custom) and antilogarithms.

๐Ÿ”ข Math & Calculators
Trigonometry Calculator - free online tool

Trigonometry Calculator

Calculate all six trig functions (sin, cos, tan, csc, sec, cot) and inverse trig functions.

๐Ÿ”ข Math & Calculators
Area Calculator - free online tool

Area Calculator

Calculate area and perimeter for 8 shapes โ€” rectangle, circle, triangle, trapezoid, and more.

๐Ÿ”ข Math & Calculators