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Converter & math tools
Units, fractions, statistics, primes, and aspect ratios — computed entirely in your browser.
- Unit converter
Length, mass, temperature, data, and more — one value in, every unit out, reference conditions stated.
- Fractions
Decimals to fractions and back — exact rationals, mixed numbers, repeating decimals marked.
- Statistics
Mean, median, mode, variance, deviation, quartiles — paste numbers, get every measure.
- Prime / GCD / LCM
Primality, factorization, next/previous prime, ranges, and multi-number GCD/LCM — exact BigInt.
- Aspect ratio & DPI
Exact aspect ratios, resize targets that lock the ratio, PPI from real dimensions, print sizes.
5 tools · everything is computed locally, nothing leaves your device.