Linking a variant calculator to the product price and cart

Topic summary

Problem: A Calconic (calconic.com) product calculator shows results correctly but does not apply the calculated value to the Shopify product price, cart, or checkout.

Context: The merchant wants the calculator’s output to sync with actual pricing so orders reflect the computed amount. A screenshot was attached, but key details are described in text.

Guidance from support: Confirm whether the app is listed in the Shopify App Store. For third‑party app behavior, contact the app’s developer to clarify capabilities and integration with price/cart updates. Only certain apps can extend checkout; Shopify provides a curated list of such apps.

Community suggestion: Many calculators only display front‑end estimates and don’t update the back‑end price used by cart/checkout, causing mismatches. Consider a “price calculator by formula” app that writes the calculated price into the cart/checkout so the charged amount matches the estimate.

Status/next steps: No confirmed resolution. Action items: reach out to Calconic support, evaluate checkout‑compatible apps, or switch to a calculator app that updates actual product/cart pricing.

Summarized with AI on December 10. AI used: gpt-5.

Hi all,

I used a calculator for my products which works fine now. Only problem is: The result of the calculator doesn’t apply to the product price and cart/check out.

I used a calculator from the calconic app (calconic.com)

Is there anyone who could help me out?

With kind regards!

Hi @SymphonyLiving ,

Thank you for reaching out to the Community. I’d be happy to provide some assistance with this request, to ensure it gets resolved. To gather a bit more information, is the app being used available in the Shopify App Store?

When it comes to third-party apps, you will want to connect with the apps developers directly for clarification on the apps capabilities. They will be able to share more information with you and the apps expected behaviour. There are however, only a handful of apps available that work to extend the functionality of your checkout. To view a complete list of those apps, you can follow this link.

Please let me know if you have any other questions or concerns.

Hi there! Good question. The problem you’re facing is common when using calculators that only show a price estimate on the front-end but don’t actually update the product’s price or trigger that value in cart/checkout. That often leads to mismatched orders and unhappy customers.
This is a tool that calculates based on user inputs AND updates the real price for cart and checkout correctly, consider using a Shopify price calculator by formula app instead of a standalone calculator widget.