Embed a library calculator
We maintain a public library of merchant calculators — area pricing, size and fit, bundle savings, shipping estimates and more. Any of them can be on your product page this week, styled to your theme rather than dropped in as an obvious third-party widget.
What’s included
- Pick any calculator from the public library
- Restyle it to your theme's type, colour and spacing
- Place it where it belongs on the template
- Responsive and keyboard accessible
Not included
- Changing the underlying formula, which is a customisation task
- Wiring the result into the cart, which is a separate task
Anything on the right is still something we do — it is simply a separate task, quoted separately, so this one keeps a fixed scope and a fixed price.
When it is done, you will have
- 1The change live on your store, published only after you approve it
- 2A clean diff you are welcome to read
- 3A short written note covering what changed and why
Before we start, we will need
- Collaborator access to your Shopify admin
- A sentence or a screenshot describing what you want
Questions people ask first
Can I see them first?
Yes — the whole library is public at /calculators. Open any of them on your phone right now; they are production code, not mockups.
Is it an app I have to pay for monthly?
No. It is built into your theme, so there is no subscription and nothing to uninstall later.
Often bought alongside
Customise a library calculator
Altered formula, inputs and branding on a library tool.
Bespoke calculator build
A new calculator built from your spec and your logic.
Calculator to add-to-cart
The result carried into the cart as line item properties.