Ratio Converter

The Ratio Converter is an online calculation tool that converts between 9 types of ratio and proportion units using decimal as the base unit. It supports internationally used units like percent (%) and per mille (‰), scientifically essential units like ppm (parts per million), ppb (parts per billion), and ppt (parts per trillion), as well as traditional Japanese ratio expressions wari, bu, and rin.

These Japanese units are commonly seen in baseball batting averages (e.g., 3-wari 2-bu 1-rin = .321) and bank interest rate displays. Environmental monitoring calculations for water pollution levels (ppm/ppb), chemical analysis for concentration management, and medical test data unit conversion are all common professional applications. Quickly convert any ratio unit without complex calculations.