Ratio & proportion tools

Common Ratio Calculators

A short, curated list — every ratio here has its own calculator, not a generated stub.

Simple ratios

One part against a larger second part.

1:12 total parts · 50% / 50%
1:23 total parts · 33.33% / 66.67%
1:34 total parts · 25% / 75%
1:45 total parts · 20% / 80%
1:56 total parts · 16.67% / 83.33%

Reverse ratios

A larger first part against one.

2:13 total parts · 66.67% / 33.33%
3:14 total parts · 75% / 25%
4:15 total parts · 80% / 20%
5:16 total parts · 83.33% / 16.67%

Dilution ratios

The concentrate-to-diluent ratios people look up most.

1:1011 total parts · 9.09% / 90.91%
1:3233 total parts · 3.03% / 96.97%
1:5051 total parts · 1.96% / 98.04%

Why this list is short

The calculator handles any ratio you type. Only ratios people genuinely search for get their own page, so every page here has real content behind it rather than a template filled with numbers.