About our math calculators
Math is a language, and a calculator is a fluent translator. The Morecalcs math tools cover the everyday questions — what percentage is 47 of 260, how do I add these two fractions, what's the standard deviation of my seven test scores — plus the ones that show up in school, work, and technical projects: scientific notation, probability, statistics, geometry, and roots. Every tool shows the answer AND the intermediate step, because reading a result is easy but understanding it is what makes you better at the underlying math.
On this page you'll find percentage and percent-change calculators (the two most-searched math tools on the internet, for good reason), fraction addition/multiplication and mixed-number handling, ratio and proportion solvers, average/mean/median/mode and full statistics, exponent and square-root, scientific notation, probability of independent events, and geometry area/perimeter/volume calculators. The scientific calculator gives you full expression parsing when you need to compute a longer formula without leaving the page.
All of our math tools are exact, not approximate. Fractions stay as fractions until you tell them to convert. Statistics show sample vs population variance so you can pick the right one. Percentage change flags negative results correctly instead of silently absolute-valuing them. And every guide underneath the calculator explains what the formula is, why it works, and what a good real-world example looks like — because a homework problem you understand is worth ten you memorized.
Which calculator do I need?
For quick 'is this a good discount?' shopping math, use the percentage calculator. For statistics assignments, the statistics calculator returns mean, median, mode, sample variance, sample standard deviation, and range in one pass. For geometry, pick the shape and enter dimensions; the tool returns area, perimeter, and volume when relevant.
The formulas we use
Percentage: (part / whole) × 100. Percent change: (new − old) / old × 100. Sample standard deviation: √(Σ(x − x̄)² / (n − 1)). Probability of independent events: P(A ∩ B) = P(A) · P(B). Geometry formulas match the standard high-school reference.
Frequently asked questions
Do the statistics calculators use sample or population formulas?
By default, sample formulas (n − 1 in the denominator) — that's what you want for real-world data. The tool notes which it's using.
Does the fraction calculator handle mixed numbers?
Yes — enter either 5/3 or 1 2/3 and the calculator handles both, returning the simplified fraction and decimal equivalent.
Is the scientific calculator a full expression parser?
Yes. Enter something like (3 + 4) * sin(30) / sqrt(2) and it returns the result following standard math precedence.