Start with the exact inputs
Subtract percentage A from percentage B to show the percentage-point difference. Divide B by A to show the numeric ratio, provided A is positive.
Concentration Cards / Free browser tool
Place two mass-per-volume percentages side by side while preserving each product’s identity.
Compare my concentration cards ↗See the method behind itFor readers comparing printed percentage numbers. Published by Steralis Labs; commercial interest disclosed.
Ready to useNo account or purchase required
Visible workingMethod, example and limits included
Your browserEntries stay in this page
One focused task
Subtract percentage A from percentage B to show the percentage-point difference. Divide B by A to show the numeric ratio, provided A is positive.
A comparison of 0.9 and 3 gives 2.1 percentage points and a numeric ratio of about 3.33. That ratio is not a ratio of medical benefit.
Do not infer stronger is better, derive a treatment choice or use this tool as dilution guidance.
Useful without a purchase
This publication serves readers comparing printed percentage numbers. The tool is available without an account, signup or product purchase. Its output is based on the information you enter; it is not an independent product test.
Use the worksheet or calculator ↗