A bare answer does not help with homework — you need to see why. These calculators are built to show the steps: how a fraction was simplified, where the critical points came from, why a z-score lands where it does. Work through them alongside the problem and they double as a checking tool and a way to learn the method.
The collection is grouped by the job you are doing — everyday arithmetic, factors and multiples, algebra and calculus, statistics, grades, and geometry and science — so you can find the right tool without knowing its exact name. Everything is free, works on a phone, and needs no account.
Which math calculator do you need?
For everyday number work start with the fraction calculator (add, subtract, multiply, divide and simplify), the long division calculator and the rounding calculator. For factors and multiples, the factoring calculator, GCF calculator and LCM calculator are the core trio. Statistics questions usually land on the mean median mode calculator or the z-score calculator. Chasing a grade? The final grade calculator tells you exactly what you need on the exam. And for triangles, the Pythagorean theorem calculator solves any side in one step.
Fractions & Arithmetic
The everyday core: fractions, long division, percentages, rounding and scientific notation, all with steps shown.
Fraction Calculator
Decimal to fraction, repeating, mixed, simplify.
Fraction to Decimal
Convert fractions, repeating marked.
Long Division Calculator
Quotient, remainder and steps.
Percentage Increase Calculator
Percent change up or down — 4 modes.
Rounding Calculator
Round to nearest 1000, 10000 — 5 modes, exact answers.
Scientific Calculator
Trig, logs, powers, roots, factorials — DEG/RAD, memory, keyboard.
Scientific Notation Converter
Decimal ↔ scientific notation, E notation included.
Significant Figures Calculator
Count sig figs — see which digits count and why.
Factors & Multiples
Factors, factoring, greatest common factors and least common multiples — the number-theory toolkit for middle and high school.
Factoring Calculator
Factor quadratics ax² + bx + c.
Factor Calculator
All factors + prime factorization.
GCF Calculator
Greatest common factor of any numbers.
LCM Calculator
Least common multiple of any numbers.
Square Root Calculator
Square, cube and nth roots with verification.
Algebra & Calculus
Derivatives, polynomial division, extrema and logarithms for older students and anyone refreshing their maths.
Derivative Calculator
Derivatives with every step — power, product, quotient & chain rules.
Polynomial Long Division Calculator
Divide polynomials step by step — quotient, remainder & a built-in check.
Absolute Max and Min Calculator
Find the absolute max & min of a function on an interval, step by step.
Log Base 2 Calculator
Binary logarithms instantly, plus any-base logs via change of base.
Statistics & Probability
Averages, spread, z-scores and the normal distribution — with the working visible so you can follow the method.
Mean Median Mode
Average, median, mode and range.
Z-Score Calculator
Standard deviations from the mean.
Normal Distribution Calculator
Bell-curve probabilities with z-scores and a shaded curve.
Sample Mean Calculator
x̄, sample & population SD — full stats from your data.
Grades & Weighted Averages
Work out what you need on the final, how weighted grades combine, and how curved scores are calculated.
Final Grade Calculator
What do you need on your final exam to pass? Find out instantly.
Weighted Average Calculator
Weighted grades & averages — plus final-exam target.
Square Root Curve Calculator
Curve test scores — 10 × √grade, class stats.
Geometry & Science
Triangles, cones, chemical formulas and wave physics — calculators that cross from maths class into science class.
Pythagorean Theorem
Solve a² + b² = c² for any side.
Cone Volume Calculator
Volume, slant height & surface area from radius and height.
Empirical Formula Calculator
Empirical & molecular formula from % or mass — all 118 elements.
Wavelength to Frequency Calculator
Convert wavelength to frequency and back — light, sound & radio.