In the app, concentrate means the material before dilution, water is the amount added, and total is their calculated sum. Write the concentrate-to-water ratio as a:b and use matching units.

1. Calculate water from concentrate

Water = concentrate × b ÷ a. With ratio 1:200 and 30 mL concentrate, water is 6000 mL and total is 6030 mL. Use the material/water mode and enter the concentrate field.

Calculating water from 30 mL concentrate at 1:200
30 mL concentrate gives 6000 mL water and 6030 mL total.

2. Calculate concentrate from water

Concentrate = water × a ÷ b. With 6000 mL water and 1:200, concentrate is 30 mL. Enter the water field in the same mode.

Calculating concentrate from 6000 mL water at 1:200
6000 mL water gives 30 mL concentrate.

3. Split a known total

Concentrate = total × a ÷ (a+b); water = total × b ÷ (a+b). In total mode, 6030 mL at 1:200 gives 30 mL concentrate and 6000 mL water.

Splitting 6030 mL total at concentrate:water 1:200
6030 mL total gives 30 mL concentrate and 6000 mL water.

Entering 6000 mL total instead gives approximately 29.85 mL concentrate, 5970.15 mL water, rounded to two decimals. '6L water' and '6L total' are different inputs.

This page explains the three input conditions. Check the product instructions for its ratio and method. Product label guidance See Dilution Ratio Calculator instructions for mode and unit selection.