How does the calculator work?
All our glue recipes are written for ½ cup (120 ml) of glue, the standard amount in the original recipes. The calculator multiplies every ingredient by the same factor: 1 cup (240 ml) of glue means twice as much of everything; ¼ cup (60 ml), half as much. It then turns small amounts into spoons: 1 teaspoon is 5 ml, 1 tablespoon is 15 ml.
Why is the activator given “to start”?
The amount of contact lens solution is a starting point, not a rule. Depending on your glue and solution, you may need a little less or a little more. Add it a little at a time while stirring, and stop as soon as the slime pulls away from the bowl. So the calculator gives a starting amount and a sensible maximum: beyond that, the slime turns hard and rubbery.
Example for a slime party
For 6 kids at ¼ cup (60 ml) of glue each, you need 1½ cups (360 ml) of glue, three times the recipe: 1½ cups (360 ml) of water, 1½ teaspoons of baking soda, and 3 tablespoons of contact lens solution to start. Plan on one bowl per kid, and an adult pours the activator. Our slime birthday party guide explains how to set it all up.
Limits
The amounts are those of the published recipes, converted and rounded to the nearest quarter spoon. Ingredients vary from brand to brand: trust the texture more than the number. If the result is sticky, breaks or stays runny, the Slime Fixer tells you what to do.
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