How calculated fields work
You write a formula that refers to other fields. When a respondent changes an answer, the form computes the formula again and shows the result. Common operations are addition, subtraction, multiplication, division, and rounding.
Examples
- Order form: quantity multiplied by unit price gives a line total.
- Quote request: the number of rooms multiplied by a rate per room gives an estimate.
- Quiz: the points from each answer added together give a final score.
Why it matters
A calculated field shows people a number while they fill in the form, such as a price or a score. You do not need to compute it by hand after the form is submitted, so there are fewer mistakes.
Calculated fields in FormFlux
FormFlux calculated fields use formulas that refer to other fields with {fieldId}. You can use +, -, *, /, ^, sqrt, round, min, and max. Calculated fields are available on the free plan.