Quick Math for Everyday Decisions
These are the calculations that show up so often they barely register as "math" anymore — but doing them by hand is exactly where small mistakes creep in.
Percentages, three ways
The Percentage Calculator covers the three versions of the same question people actually ask: what is X% of Y, what percent is X of Y, and what's the percent change from X to Y. Keeping all three in one tool avoids the mental gymnastics of rearranging the formula in your head.
Fractions and simplification
The Fraction Calculator adds, subtracts, multiplies, and divides fractions and automatically simplifies the result to its lowest terms — the step most people get wrong by hand, especially with larger denominators.
Fair, verifiable randomness
The Random Number Generator uses your browser's cryptographically secure random source rather than a predictable algorithm, which makes it suitable for raffles, games, and picking teams — and it can shuffle a list of names directly, not just generate numbers.