MathCalcTools is a free library of 17 math calculators, from square roots to derivatives, that shows the formula and a worked example behind every result instead of just a number.
Each one returns the answer and the steps that get you there.
Find the square root of any number and the simplified radical form, with the factoring steps.
Show my answer →Free volume calculator for 6 common shapes: cube, box, sphere, cylinder, cone, and pyramid. Pick a shape, enter the dimensions, and get the volume wit
Show my answer →Free square footage calculator. Enter length and width to get square feet and acres. Add multiple rooms or areas and get a running total. Unit options
Show my answer →Free Ohm's law calculator. Enter any 2 of voltage, current, resistance, or power and solve for the other two. Formulas and worked example included.
Show my answer →Free right triangle calculator. Enter any 2 known values (legs, hypotenuse, or an angle) to solve the rest. Shows all sides, angles, area, perimeter,
Show my answer →Free triangle calculator. Enter any combination of sides and angles (SSS, SAS, ASA, AAS) to find all missing values. Shows area via Heron's formula, p
Show my answer →Solve ax squared + bx + c = 0. Get the discriminant and real or complex roots, step by step.
Show my answer →Two points in, slope out, plus the y-intercept, the equation of the line, and the distance.
Show my answer →Differentiate a function and see the rule applied at each step.
Show my answer →Find definite and indefinite integrals with the worked steps.
Show my answer →Raise any base to any power, including negative and fractional exponents.
Show my answer →Factor whole numbers and quadratics into their building blocks.
Show my answer →Find the greatest common factor of two or more numbers.
Show my answer →Solve for the hypotenuse or a missing leg of a right triangle.
Show my answer →Compute the mean, variance, and standard deviation of a data set.
Show my answer →Find the mean, median, and mode of a list of numbers.
Show my answer →Round any number to a chosen place value or number of decimals.
Show my answer →An answer without the steps is just a guess you have to trust.
A number on its own does not help much when you are trying to understand a method or check your homework. Every calculator here pairs the result with the formula and a short worked example, so you can see exactly how the answer was reached. The square root tool simplifies radicals and shows the factoring. The quadratic solver reports the discriminant before the roots. The slope calculator walks from two points to the full line equation. Where a neutral reference helps, we link to sources like Wolfram MathWorld. For the exact formula behind every tool on this site in one place, see the Math Formulas Reference (2026). The same operation shows up when a teacher curves a tough exam; the grade-curving tool on this site works through that version.
Yes. Every tool on MathCalcTools is free to use, with no sign-up. Calculations run in your browser.
Yes. Each calculator shows the formula and a worked, step-by-step example so you can follow the method, not just the answer.
Yes. The site is built mobile-first, so the calculators and steps work on any screen size.
The tools use standard formulas and round results for readability. For graded work, double-check the final figure against your own working.