13 available tools
Math & Statistics Tools
Solve fractions, equations, ratios, statistics, and probability with clear working and precise results.
Available tools
Scientific Calculator
Evaluate expressions with trigonometry, logarithms, powers, roots, factorials, and DEG/RAD modes.
Fraction Calculator
Add, subtract, multiply, and divide fractions with simplification, decimal, mixed number, and working steps.
Percentage Calculator
Calculate percentages, increases, decreases, and percentage change with a clear explanation.
Rule of Three Calculator
Solve direct and inverse proportions and see the calculation step by step.
Mean, Median and Mode Calculator
Calculate mean, median, mode, sum, range, and extremes for a list of numbers.
Standard Deviation Calculator
Calculate mean, population and sample variance, and standard deviation from a dataset.
Probability Calculator
Calculate simple probability, complements, independent events, unions, and conditional probability.
Quadratic Equation Calculator
Solve ax² + bx + c = 0 and find the discriminant, real or complex roots, vertex, and axis.
Ratio and Proportion Calculator
Solve one unknown in A:B=C:D or simplify an integer ratio such as 1920:1080.
LCM and GCF Calculator
Calculate the greatest common factor, least common multiple, and prime factors of multiple integers.
Combination and Permutation Calculator
Calculate combinations C(n,r) and permutations P(n,r) exactly, including large integers.
Exponents and Roots Calculator
Calculate powers and nth roots with negative or fractional exponents and real-domain validation.
Scientific Notation Calculator
Convert decimals to scientific notation and expand values written as coefficient × 10ⁿ or E notation.
Showing 1–13 of 13 tools
Calculation and algebra
Use the scientific calculator for complete expressions or choose a focused tool for fractions, quadratic equations, powers, roots, LCM, GCF, and ratios.
Focused tools display formulas and useful working steps so each result can be checked.
Statistics and probability
Analyze datasets with mean, variance, and population or sample standard deviation. The probability calculator separates simple cases, complements, independent events, and conditional probability.
Calculations run locally in the browser and do not send datasets to external servers.
Frequently asked questions
Which calculator should I use?
Choose the scientific calculator for general expressions and a focused calculator when you need working steps, validation, or additional results.
Are calculations rounded?
Intermediate results are not rounded. Display formatting removes artificial decimals, and combinatorial calculations use exact integers.