Order & checkout forms
Tally multiple products and quantities, then show the final cost before checkout — no manual totals.
Calculating Fields
Forms that do the math for you
Add a calculation field to any form and watch totals, taxes, and quotes update in real time. Reference fields with simple formulas like Qty × Price — no code, no spreadsheets, no manual maths.
Trusted by leading organisations
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Why it matters
Let your forms handle the maths
When totals, taxes, and quotes are calculated automatically, respondents see accurate numbers the instant they type — and your team stops checking arithmetic by hand. No formulas in spreadsheets, no follow-up emails to confirm a price.
0manual calculations — totals, taxes, discounts, and quotes are computed live from your formulas as respondents fill in the form
How it works
From form fields to a live, accurate total
+ Add ElementsCalculation
Formula
@price×@quantity
Field label
Total Cost
Build
Write a formula that references your fields
Add a calculation field, then use the @ sign to reference other fields. Multiply, add, or combine them however your form needs — no code required.
Subtotal (3 × $20.00)$60.00
Tax (8%)$4.80
Discount−$5.00
Total due$59.80
Fill
Totals update the moment someone types
As respondents answer, every calculation field recomputes instantly. People see the price, fee, or score change in real time — so there are no surprises at submission.
Calculated total$59.80
sent to payment
Pay now$59.80
Use it
Quote, charge, and score automatically
Pipe the calculated total into a payment field to charge the exact amount, or use it to score a quiz and grade results — all from the same form.
The difference
A calculated form vs. a plain form or spreadsheet
| Formester calculation form | Plain form or spreadsheet | |
|---|---|---|
| Totals computed automatically | Built in | Manual maths |
| Updates as people type | Real time | No |
| Reference fields with formulas | @ any field | Cell references |
| Taxes, discounts & multi-step pricing | Handled in the form | DIY |
| Feeds a payment field | Charge the exact total | Separate step |
| Respondent sees the result | Before they submit | After follow-up |
A spreadsheet calculates after the fact, and a plain form just collects numbers. A calculation form does the maths while the respondent fills it in, so the total they see is the total you collect.
Real-life use cases
What teams build with calculation fields
Booking & quote forms
Adjust the price by dates, options, or add-ons so customers get an instant, accurate quote.
Loan & payment calculators
Estimate monthly payments, fees, and final amounts as people change the inputs in real time.
Quizzes & assessments
Score answers automatically and show a grade or result the moment a learner submits.
Testimonials
Teams automate the maths with Formester
"I'm migrating my forms from Paperform, where I've been a user for over 4 years. Loving the software so far! I've already replaced Paperform form embed…"
"Formester is simple enough for non-developers and sophisticated enough for developers. I'd say being able to choose between simplicity and complexity …"
"Formester is really easy to use and an exceptional alternative for Typeform. We use it for call for papers, lead registrations, feedback and surveys a…"
"I was searching for a long time for a product I could use to send newsletters and surveys to my database. I tried so many different types of software …"
"Formester's AI form generator transformed how quickly we build forms. The drag-and-drop builder paired with AI-generated templates means I can spin up…"
"I really enjoy Formester. It’s clean and straight-forward and it does well, what it is supposed to do."
FAQ
Calculation field FAQs
Find answers to common questions below, or reach out to our team for more help.
Free to start
Let your forms do the calculations
Add a calculation field, reference your fields with a formula, and publish.