Free Math Calculators
Percentages, geometry, statistics, algebra, and more. Solve any math problem instantly with our free, step-by-step calculators.
Discount Calculator
Calculate sale prices, savings, and tax instantly
Discount Details
Enter the original price, discount, and optional tax rate
Optional: applied after discount
Find a Calculator
Search all 28 math tools — percentages, geometry, statistics, algebra, and more.
Try "percentage", "area", "volume", or "statistics"
All Math Calculators
(28)Percentage Calculator
Calculate percentages, increases, decreases, and differences.
Fraction Calculator
Add, subtract, multiply, and divide fractions.
Scientific Calculator
Advanced scientific calculations with trigonometry and more.
Unit Converter
Convert length, weight, temperature, and more.
GPA Calculator
Calculate your grade point average.
Age Calculator
Calculate your exact age in years, months, and days.
Standard Deviation
Calculate mean, variance, and standard deviation.
Circle Calculator
Calculate circle radius, diameter, circumference, and area from any one known property with interactive circle diagram.
Pythagorean Theorem Calculator
Calculate the missing side of a right triangle using the Pythagorean theorem with visual diagram and triangle classification.
Triangle Calculator
Solve triangles using SSS, SAS, ASA, AAS methods. Calculate angles, sides, area, perimeter, inradius, and circumradius with interactive triangle diagram.
Slope Calculator
Calculate slope, distance, midpoint, angle, and line equations (slope-intercept, point-slope, standard form) between two points with coordinate plane visualization.
Area Calculator
Calculate the area of rectangles, triangles, trapezoids, parallelograms, circles, ellipses, sectors, and rhombuses with shape diagrams.
Volume Calculator
Calculate the volume and surface area of cubes, spheres, cylinders, cones, pyramids, prisms, and tori with 3D shape diagrams.
Surface Area Calculator
Calculate total, lateral, and base surface area of 3D shapes including cubes, spheres, cylinders, cones, pyramids, and hemispheres with net diagrams.
Number Sequence Calculator
Analyze number patterns to identify arithmetic, geometric, Fibonacci, quadratic, and power sequences. Predict next terms with formula and step-by-step explanation.
Sample Size Calculator
Calculate the required sample size for surveys and research studies using Cochran's formula with finite population correction.
Probability Calculator
Calculate probability for single events, compound events (AND/OR), and complementary probability with odds notation and probability scale.
Statistics Calculator
Comprehensive descriptive statistics including quartiles, IQR, outlier detection, skewness, frequency distribution, and box plot visualization.
Mean Median Mode Range
Calculate mean, median, mode, and range for any dataset with step-by-step solutions and frequency distribution visualization.
Permutation & Combination
Calculate permutations (nPr), combinations (nCr), and factorials with step-by-step computation and Pascal's triangle.
Z-Score Calculator
Calculate z-scores, percentiles, and probabilities for normal distribution. Convert between raw scores and z-scores with bell curve visualization.
Confidence Interval Calculator
Calculate confidence intervals for population means and proportions with margin of error, z-critical values, and number line visualization.
Quadratic Formula Calculator
Solve quadratic equations ax² + bx + c = 0 with step-by-step solutions, discriminant analysis, vertex form, and parabola visualization.
Log Calculator
Calculate logarithms in any base including common log (base 10), natural log (ln), binary log (base 2), or custom base with step-by-step solutions.
Random Number Generator
Generate random numbers with options for integers, decimals, even/odd/prime only, custom range, no duplicates, and sorting.
Exponent Calculator
Calculate base raised to any exponent power with support for negative bases, fractional exponents, Euler's number e, and exponent laws reference.
Grade Calculator
Calculate your current class grade from assignments, tests, and categories with weighted grading. Supports custom categories, shows letter grade with +/- modifiers, and a detailed breakdown of each category's contribution.
Final Grade Calculator
Find out what score you need on your final exam to achieve your desired grade. Enter your current grade, desired grade, and final exam weight to get instant results.
Need to Solve a Math Problem?
Use the Discount Calculator above to instantly see your sale price, or explore all 28 math tools for geometry, statistics, algebra, and more.