Calculations

A Calculation field works out a number from other answers, such as a total price. People see the answer as they fill in the form, and can't change it.

Steps

1. Open the form in the Form builder.
2. Drag the Calculation field from Form fields onto your form. It is called "Total" to start with. Change the Question if you like.
3. Under Work it out, choose what to Start with: a question, or A number… and type it.
4. Click + Add another step. Choose plus, minus, times or divided by, then a question or a number.
5. Add more steps as needed, up to 20.
6. Under Show the answer as, choose Dollars, like $12.50, A number, like 12.5 or A whole number, like 13.
7. Click Save in the settings window, then Save at the top of the builder.

Example

For a ticket order: Start with Tickets, then times 25, then plus Donation.

How the answers count

• Steps are worked out left to right, like a calculator. There are no brackets, so 2 plus 3 times 4 gives 20.
• A choice counts as the number in its option, so "Adult ($25)" counts as 25.
• With Choose several, the ticked options are added up.
• A ticked Tick box counts as 1.
• An empty answer counts as 0. Dividing by 0 gives 0.
• You can use number, amount, short answer, dropdown, Choose one, Choose several and Tick box questions. Questions inside a repeat group can't be used.

Good to know

• Formhub works the answer out again when the form is sent, so a number changed in the browser counts for nothing.
• If the Calculation sits in a hidden section, it gives no answer (see Show or hide questions).
• To charge the total by card, add a Payment field and choose The amount in a question, such as a Calculation total. See Take card payments in a form.
• The answer appears on the response like any other answer.