Free Online Math Calculators
Powerful math calculators for students, teachers, engineers, and professionals. From basic arithmetic to advanced algebra and statistics - all free, no registration required.
★ Most Popular Math Calculators
Scientific Calculator
Advanced calculator with trigonometry, logarithms, exponents, and scientific functions for students and professionals.
Percentage Calculator
Find percentages, calculate what percent one number is of another, or determine percentage increase and decrease.
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions and simplified results.
Square Root Calculator
Calculate square roots of any number instantly, including perfect squares and decimals.
Quadratic Formula Calculator
Solve quadratic equations ax² + bx + c = 0 and find real or complex roots with step-by-step solutions.
Average Calculator
Calculate the arithmetic mean, weighted average, or moving average of any number set.
All Math Calculators
Basic Calculator
Perform addition, subtraction, multiplication, and division with this simple online calculator.
Triangle Calculator
Find missing sides, angles, area, and perimeter of any triangle using known values.
Volume Calculator
Calculate the volume of cubes, spheres, cylinders, cones, and other 3D geometric shapes.
Standard Deviation Calculator
Compute standard deviation, variance, and mean for any data set with detailed statistical analysis.
Random Number Generator
Generate random numbers within any range for games, statistics, raffles, or decision making.
Exponent Calculator
Calculate powers and exponents including negative exponents, fractions, and large numbers.
Binary Calculator
Perform binary arithmetic and convert between binary, decimal, octal, and hexadecimal numbers.
Hex Calculator
Calculate hexadecimal operations and convert hex to decimal, binary, and other number systems.
Slope Calculator
Find the slope, y-intercept, and equation of a line from two points or point-slope form.
Log Calculator
Calculate natural logarithms (ln), common logarithms (log10), and logarithms of any base.
Area Calculator
Calculate the area of rectangles, circles, triangles, trapezoids, and other 2D shapes.
Probability Calculator
Calculate probability of single events, multiple events, conditional probability, and odds.
Statistics Calculator
Analyze data sets with mean, median, mode, range, quartiles, and other statistical measures.
Mean Median Mode Calculator
Find the mean, median, and mode of any number set to understand central tendency in data.
Permutation Calculator
Calculate permutations (nPr) and combinations (nCr) for probability and counting problems.
Z-Score Calculator
Convert raw scores to z-scores and find probabilities using the standard normal distribution.
Confidence Interval Calculator
Calculate confidence intervals for population means and proportions at various confidence levels.
Ratio Calculator
Simplify ratios, solve proportions, and scale ratios up or down for recipes, maps, and more.
Distance Calculator
Calculate the distance between two points in 2D or 3D space using the distance formula.
Circle Calculator
Find the circumference, area, diameter, and radius of a circle from any known value.
Surface Area Calculator
Calculate surface area of spheres, cubes, cylinders, cones, pyramids, and prisms.
Pythagorean Theorem Calculator
Find the missing side of a right triangle using the Pythagorean theorem a² + b² = c².
Right Triangle Calculator
Solve right triangles by finding all sides, angles, area, and perimeter from known values.
Root Calculator
Calculate any nth root including cube roots, fourth roots, and roots of decimal numbers.
LCM Calculator
Find the least common multiple (LCM) of two or more numbers for fraction operations.
GCF Calculator
Find the greatest common factor (GCF) of two or more numbers to simplify fractions.
Factor Calculator
Find all factors and factor pairs of any positive integer, including prime factorization.
Rounding Calculator
Round numbers to the nearest whole number, decimal place, or significant figure.
Matrix Calculator
Perform matrix addition, subtraction, multiplication, determinants, and inverse operations.
Scientific Notation Calculator
Convert numbers to and from scientific notation and perform calculations in scientific form.
Big Number Calculator
Perform arithmetic with extremely large numbers that exceed normal calculator limits.
Prime Factorization Calculator
Break down any number into its prime factors with a factor tree and exponential form.
Long Division Calculator
Solve long division problems with step-by-step work, quotients, and remainders shown.
P-Value Calculator
Calculate p-values for t-tests, z-tests, and chi-square tests for statistical significance.
Percent Error Calculator
Calculate the percent error between experimental and theoretical values in science experiments.
Half-Life Calculator
Calculate radioactive decay, remaining substance, or time elapsed using half-life formulas.
Sample Size Calculator
Determine the required sample size for surveys and studies based on confidence level and margin of error.
Number Sequence Calculator
Find patterns in arithmetic, geometric, and Fibonacci sequences and predict next terms.
Percent Increase Calculator
Calculate the percentage increase from an original value to a new higher value.
Percent Decrease Calculator
Calculate the percentage decrease from an original value to a new lower value.
Percentage Change Calculator
Find the percentage difference between two values, whether increase or decrease.
Proportion Calculator
Solve proportions and find missing values in equivalent ratios like a/b = c/d.
Mixed Fraction Calculator
Add, subtract, multiply, and divide mixed numbers and improper fractions with solutions.
Decimal to Fraction Calculator
Convert any decimal number to a fraction in lowest terms, including repeating decimals.
Midpoint Calculator
Find the midpoint between two coordinates in 2D or 3D space using the midpoint formula.
Perimeter Calculator
Calculate the perimeter of rectangles, squares, triangles, circles, and irregular polygons.
About Our Math Calculators
For Students
Our math calculators help students with homework, exam preparation, and understanding mathematical concepts. Use the percentage calculator for quick calculations, or the quadratic formula calculator for solving equations.
For Professionals
Engineers, scientists, and business professionals rely on our scientific calculator for complex calculations, statistical analysis, and data processing.
Calculator Categories
- • Basic Math: Addition, subtraction, multiplication, division
- • Percentages: Percent change, increase, decrease, tip calculations
- • Fractions: Add, subtract, multiply, divide fractions
- • Algebra: Quadratic equations, slope, linear equations
- • Geometry: Area, volume, perimeter, triangle calculations
- • Statistics: Mean, median, mode, standard deviation
Frequently Asked Questions
What math calculators are available on Calculator Lab?▼
Calculator Lab offers 52+ free math calculators including percentage calculators, fraction calculators, scientific calculator, quadratic formula solver, statistics calculators, geometry tools, and more. All calculators work on desktop, tablet, and mobile devices.
Are these math calculators free to use?▼
Yes, all Calculator Lab math calculators are completely free. No registration, no downloads, no hidden fees. Just open the calculator and start calculating instantly.
Can I use these calculators for homework?▼
Absolutely! Our calculators are designed to help students learn and verify their work. Each calculator shows the formula used and step-by-step explanations to help you understand the math, not just get the answer.
Which calculator should I use for percentage problems?▼
Use our Percentage Calculator which handles three types of problems: finding X% of Y, finding what percent X is of Y, and calculating percentage change between two values.