Math Calculators
20 free online calculators
About Math Calculators
Math problems are easy to get wrong in the small steps — a misplaced decimal, the wrong formula, an arithmetic slip. ToolForge's math calculators cover the common ground from arithmetic to statistics: percentages, fractions, ratios, averages, rounding, exponents and roots, factors, prime factorization, GCF and LCM, standard deviation, mean-median-mode-range, probability, permutations and combinations, area and volume, the Pythagorean theorem, quadratic equations, and scientific notation.
Students check homework and learn the method, since most of these show step-by-step working, formulas, and breakdowns rather than just an answer. Teachers, engineers, and anyone facing a quick calculation use them too. Every tool runs instantly in your browser with no sign-up, and the worked steps make them as useful for understanding as for getting the result.
Percentage Calculator
Calculate percentages, percentage increase/decrease
Fraction Calculator
Add, subtract, multiply, divide fractions
Average Calculator
Calculate mean, sum, count, min, max
Mean Median Mode Range Calculator
Calculate mean, median, mode, and range
Standard Deviation Calculator
Calculate population and sample standard deviation
Percentage Error Calculator
Calculate percentage, absolute, and relative error
Exponent Calculator
Calculate exponents and powers
Root Calculator
Calculate nth roots and square roots
Ratio Calculator
Simplify and scale ratios
Rounding Calculator
Round numbers to decimal places
GCF / LCM Calculator
Calculate Greatest Common Factor and Least Common Multiple
Factor Calculator
Find all factors and factor pairs of a number
Prime Factorization Calculator
Calculate prime factorization with factor tree
Probability Calculator
Calculate P(A), P(A∩B), P(A∪B), P(A|B)
Permutation & Combination Calculator
Calculate nPr permutations and nCr combinations
Area Calculator
Calculate area of rectangles, circles, triangles, and more
Volume Calculator
Calculate volume of 3D shapes
Pythagorean Theorem Calculator
Calculate missing side of right triangle using a²+b²=c²
Quadratic Formula Calculator
Solve quadratic equations with discriminant and roots
Scientific Notation Calculator
Convert to/from scientific notation and perform operations
Other Calculator Categories
Frequently Asked Questions
Do these calculators show the steps, not just the answer?
Most do. Tools like the fraction, percentage, standard deviation, and quadratic calculators display the formula and a step-by-step breakdown, which makes them genuine learning aids rather than black boxes.
What is the difference between permutations and combinations?
Permutations count arrangements where order matters, while combinations count selections where it does not. The dedicated calculator computes both at once and shows the factorial formulas behind each so the distinction is clear.
Can I use these for statistics homework?
Yes. The mean-median-mode-range, standard deviation, and probability calculators cover core introductory statistics, accept a list of numbers, and show the supporting figures and working you would be expected to demonstrate.
