Isotonics / the buying desk
How much drink does the tub make?
Powder, tablets and ready-mixed bottles have different pack sizes. Use the mixing instructions to work out the prepared volume before comparing costs.
- 01 / Powder per serving
- 02 / Prepared volume
- 03 / Servings per pack
Isotonics buying notes
Read the isotonics guide →Compare the cost per unit
Choose one consistent unit: pieces, kilograms, litres or prepared litres, as appropriate. Divide total cost by the quantity. Do not compare unlike product types on price alone.
Powder per serving
Write down the amount of powder or number of tablets per serving, and the volume of water stated on the label. Multiply that prepared volume by the number of servings in the pack.
Prepared volume
Keep nutrition figures on the same basis: per serving or per 100 ml. The calculator compares quantities and prices; it does not decide what or how much you should drink.
Servings per pack
Count the servings stated on the pack and retain the serving size beside that number.