Triangle Calculator
Solve any triangle using SSS, SAS, ASA, AAS, SSA, right triangle, and Pythagorean theorem modes
Calculate ->32 free calculators
Math calculators with step-by-step working
Every formula shown clearly — perfect for students, teachers, and professionals.
Area Calculator
Calculate the area of common 2D shapes with formula substitutions and unit conversions
Calculate ->Volume Calculator
Calculate the volume and surface area of common 3D shapes with full working and practical litre conversions
Calculate ->Circle Calculator
Calculate radius, diameter, circumference, area, arc length, sector area, chord length, and segment area
Calculate ->Distance Calculator
Calculate the distance and midpoint between two points in 2D or 3D space with step-by-step working
Calculate ->Slope Calculator
Calculate slope between two points, convert linear equations, and find parallel or perpendicular lines
Calculate ->Surface Area Calculator
Calculate the total surface area of common 3D shapes with component breakdowns and step-by-step working
Calculate ->Percentage Calculator
Calculate percentages five ways including percentage of, percentage change, difference, and add or subtract a percentage
Calculate ->Exponent and Root Calculator
Calculate exponents, powers, roots, and scientific notation with step-by-step working
Calculate ->Quadratic Formula Calculator
Solve quadratic equations with the quadratic formula, discriminant, complex roots, and vertex form
Calculate ->Logarithm Calculator
Calculate logarithms with any base, natural logs, and logarithm equations with step-by-step working
Calculate ->Ratio Calculator
Simplify ratios, scale ratios, divide totals into ratios, and convert ratios to fractions and percentages
Calculate ->Binary Calculator
Calculate binary arithmetic, convert between binary decimal hex and octal, and perform bitwise operations
Calculate ->Hex Calculator
Calculate hexadecimal arithmetic, base conversions, and web color codes
Calculate ->Matrix Calculator
Add, subtract, multiply, invert, transpose matrices and solve systems of equations
Calculate ->LCM and GCF Calculator
Calculate the Least Common Multiple and Greatest Common Factor with step-by-step working
Calculate ->Factor Calculator
Find all factors of any number with prime factorisation, factor pairs, and step-by-step working
Calculate ->Rounding Calculator
Round numbers to decimal places, nearest values, significant figures, or truncate without rounding
Calculate ->Scientific Calculator
A fast browser scientific calculator with trigonometry, logarithms, powers, roots, memory, and keyboard support
Calculate ->Scientific Notation Calculator
Convert numbers to and from scientific notation and perform arithmetic in scientific notation
Calculate ->Modulo Calculator
Calculate modulo, remainders, Euclidean division, and practical modular arithmetic examples
Calculate ->Random Number Generator
Generate random integers, decimals, list picks, and unique number sets instantly
Calculate ->Percent Error Calculator
Calculate percent error between experimental and theoretical values with step-by-step working
Calculate ->Half-Life Calculator
Calculate radioactive decay, half-life, and time elapsed with carbon dating examples
Calculate ->Mean, Median, Mode and Range Calculator
Calculate mean, median, mode, range, quartiles, variance, and standard deviation from any dataset
Calculate ->Standard Deviation Calculator
Calculate population and sample standard deviation and variance with full step-by-step working
Calculate ->Probability Calculator
Calculate basic probability, combined events, conditional probability, and binomial probability
Calculate ->Sample Size Calculator
Calculate the sample size needed for statistically valid survey and research results
Calculate ->Z-Score Calculator
Calculate z-scores, percentile ranks, and standard normal distribution probabilities
Calculate ->Confidence Interval Calculator
Calculate confidence intervals for population mean and proportion with z-interval and t-interval working
Calculate ->Permutation and Combination Calculator
Calculate permutations, combinations, and factorials with step-by-step working
Calculate ->Number Sequence Calculator
Calculate arithmetic, geometric, and Fibonacci sequences and identify unknown sequence patterns
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