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31 Free Tools · Instant Results

Free Online Math & Science Calculators

From quick percentage calculations to solving quadratic equations — our math tools provide step-by-step solutions with visual graphs, making complex calculations understandable for everyone.

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31+

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Percentage Calculator

6 simultaneous modes: X% of Y, what %, change, increase & decrease

Popular

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Scientific Calculator

Expression parser with trig, log, exp, history & DEG/RAD toggle

Popular

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Triangle Calculator

Solve any triangle — sides, angles, area, perimeter (SSS, SAS, ASA, AAS)

Popular

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Recently Added

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Area CalculatorNew

Area & perimeter of 5 shapes: rectangle, circle, triangle, square, trapezoid

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Prime Number CheckerNew

Instant prime check with factors and first 25 primes reference

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Logarithm CalculatorNew

Calculate log base 2, 10, e, and any custom base with step-by-step solution

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Ratio CalculatorNew

Simplify ratios, find missing values, and scale recipes or mixtures

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LCM & GCF CalculatorNew

Least Common Multiple and Greatest Common Factor with step-by-step solution

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Factor CalculatorNew

All factors and prime factorization of any integer with visual breakdown

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Volume CalculatorNew

Volume of cube, sphere, cylinder, cone and other 3D shapes

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Triangle CalculatorNew

Solve any triangle — sides, angles, area, perimeter (SSS, SAS, ASA, AAS)

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Circle CalculatorNew

Circumference, area, diameter and arc length from radius or diameter

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Z-Score CalculatorNew

Standardize data points with Z-score, percentile rank and normal distribution

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Permutation & CombinationNew

nPr and nCr calculations with factorial steps and formula explanation

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Average CalculatorNew

Mean, weighted mean, and running average for any dataset

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Matrix CalculatorNew

Matrix addition, subtraction, multiplication, determinant and inverse operations

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Linear Equation SolverNew

Solve single and system of linear equations with step-by-step solution

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Random Number GeneratorNew

Generate random integers or decimals with custom range and count

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Percent Error CalculatorNew

Calculate percent error between experimental and theoretical values

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Surface Area CalculatorNew

Surface area of 6 3D shapes: cube, sphere, cylinder, cone, pyramid and rectangular prism

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Exponent CalculatorNew

Calculate base raised to any power with scientific notation output and step-by-step display

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Root CalculatorNew

Calculate nth root of any number with Newton's method steps and verification

Binary CalculatorNew

Binary arithmetic (add, subtract, multiply) with step-by-step conversion and multi-base output

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Number SequenceNew

Arithmetic, geometric and Fibonacci sequences with nth term formula, sum formula and first 10 terms

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Probability CalculatorNew

Single and compound event probability (AND/OR) with odds, complement and expected value

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Confidence IntervalNew

Confidence interval for sample data with margin of error and statistical interpretation

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Sample Size CalculatorNew

Required sample size for surveys and A/B tests by confidence level and margin of error

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Distance CalculatorNew

2D distance between two coordinates with midpoint, slope and line equation

All Math & Science Tools

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Statistics Calculator

Mean, median, mode, std dev, IQR, quartiles & histogram

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Quadratic Formula

Solve ax²+bx+c=0 with roots, vertex & parabola chart

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Pythagorean Theorem

Find any triangle side with area and perimeter

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Fraction Calculator

Add/subtract/multiply/divide with simplified result & mixed number

Why Our Math & Science Tools?

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Percentage Tools

6 simultaneous modes: X% of Y, what %, increase, decrease, change, and reverse.

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Scientific Calculator

Full expression parser with trig, logarithms, exponents, and calculation history.

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Algebra & Geometry

Quadratic formula, Pythagorean theorem, area calculator with visual diagrams.

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Statistics

Mean, median, mode, standard deviation, IQR, quartiles, and histogram visualization.

Math calculators serve students, teachers, engineers, and professionals. Our percentage calculator alone handles 6 simultaneous calculation modes — far beyond what Calculator.net offers.