Learn & Support · Forms and logic

Calculate a total as people type

Quantity times price, worked out on the form as people fill it in.

A 1:45 video; captions under CC. The steps are below too.

1. Add a number field

   In UI & Data, create a form (here, Cupcake Order) and choose Fields. Under Input, choose number. Open the new field, choose Settings, label it Quantity, and choose Submit.

2. Add the money fields

   For money, choose currency the same way: one labeled Price each, and one labeled Total. Currency fields show a dollar sign and two decimals.

3. Write the logic

   Choose Form Logic, then Write as text. Under on load, set Price each to 3.50; under on change Quantity, set Total to Quantity times Price each. Names with spaces go in quotes.

4. Check and apply

   Choose Check to make sure it reads right, then Apply to save it. Prefer not to type? Click to build makes the same logic from menus.

5. Open the form

   Close Form Logic, choose Sharing, then Open Link. The form opens on its own page with Price each already filled in.

6. Watch the total

   Type a quantity and the total is worked out: 12 at $3.50 is $42.00. Change the quantity, and the total follows.

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