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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.
](/converters/units)
- [Fractions

Decimals to fractions and back — exact rationals, mixed numbers, repeating decimals marked.
](/converters/fractions)
- [Statistics

Mean, median, mode, variance, deviation, quartiles — paste numbers, get every measure.
](/converters/statistics)
- [Prime / GCD / LCM

Primality, factorization, next/previous prime, ranges, and multi-number GCD/LCM — exact BigInt.
](/converters/primes)
- [Aspect ratio & DPI

Exact aspect ratios, resize targets that lock the ratio, PPI from real dimensions, print sizes.
](/converters/aspect-ratio)

5 tool s · everything is computed locally, nothing leaves your device.

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Canonical HTML: https://nutter.tools/converters
Markdown version: https://nutter.tools/converters/index.md
Plain-text version: https://nutter.tools/converters/index.txt
Agent index: https://nutter.tools/llms.txt