Math Calculators
Percentage, fractions, scientific functions, and statistics. Every calculator shows the formula and the working — not just the answer.
Available now
What is X% of Y, percentage change, percentage increase or decrease — every variant on one page.
Split a restaurant bill any way — choose tip %, divide between people, see per-person total.
Sale price from % off, original price from sale price, or discount % from before/after price.
Coming soon
Add, subtract, multiply, divide fractions and simplify to lowest terms.
Full scientific calculator with trig, log, exp, factorial, and inverse functions.
Mean, median, mode, standard deviation, variance, and quartiles from any dataset.
Solve ax² + bx + c = 0 with real and complex roots, full working shown.
About Calctube math tools
Math is best learned by seeing the steps, not just the answer. Every Calctube math calculator shows the formula, substitutes your values, and walks the working out line by line. The goal is for the underlying method to stick — so the next time you encounter the same kind of problem, you can do it on paper.
Frequently asked questions
Do Calctube math calculators show the working?
Yes. Every result shows the formula used, the substituted values, and the steps to the answer. The goal is to teach the math, not just hand over a number.
Can I use Calctube math calculators for homework?
Yes — they are accurate and free. We recommend writing out the working yourself afterwards so the method sticks.
Why is the percentage calculator one page instead of three?
Most users want "what is X% of Y", "what % is X of Y", and "Y is X% more than what" — all variations of the same arithmetic. One page lets you toggle between the modes without losing your inputs.