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Calculators by Symmetry (CBS) has two integration paths: embeddable widgets and the calculators API. Both use the same Symmetry tax data and return the same compliant results; the difference is how much of the UI and hosting you own.

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What are you trying to do?

Embed a calculator fast, with no UI work

Use widgets. Add one script tag and Symmetry hosts and renders the calculator UI. Configure defaults, theme, and help text inline, by URL, or in the admin console.

Own the UI or run calculations server-side

Use the API. Send inputs from your own interface (or backend) and receive results to display, store, or report on.
Pick by intent:
  • “I just want a working calculator on a page.” → widgets
  • “Fastest possible launch and a standard UI is fine.” → widgets
  • “It needs to match my product’s look exactly.” → API
  • “I need calculations on my server or in batch.” → API
  • “I want to store or report on results.” → API
  • “Not sure, or want both?” → Start with widgets and add the API later. They share the same tax engine, so results stay consistent.

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At a glance

Both paths stay current with federal, state, and local tax changes automatically, so your choice comes down to control and integration depth, not accuracy.

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Next steps

Widgets quickstart

Embed your first calculator in minutes.

API quickstart

Make your first calculators API call.