Practical / United States

Mixing ratio calculator

Scale liquid label instructions like 2 fl oz per gallon into the amount of concentrate you need for a different water amount.

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Mix label ratio

Concentrate needed = desired water amount × label concentrate ratio

Label ratio

What you want to mix

How it works

The calculator converts the label amount and your target water amount into the same base unit, then scales the concentrate proportionally.

Formula: concentrate needed = desired water amount × label concentrate amount ÷ label water amount

Safety notes

  • Only scale the label ratio.
  • Do not exceed the label concentration.
  • Use proper protective equipment when required.
  • Do not use this for medicine, food safety, or hazardous chemicals.

Mixing ratio diagram

Flow diagram showing label ratio scaled to a desired water amount
Convert the label ratio to one base unit, then scale it to the batch size you want.

Example

A label says 2 fl oz of concentrate per 1 gallon of water.

For 1 liter of water, use about 15.6 ml of concentrate.

This is useful for fertilizer, cleaner, and car-wash instructions.