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Business / Monetization

Purchase Power Calculator: Streaming Math as an Argument

August 2, 2026

An interactive tool that converts a direct purchase into the number of Spotify streams it would take to match it — including the threshold below which a track earns nothing at all.

Most people who love an artist have no idea what their listening is worth to them. Not because they don’t care — because the number is abstract and nobody has ever shown it to them.

What I built

A client-side calculator on this site that turns a price into a stream count:

Why it exists

I have been releasing music through the whole arc: torrenting, when there was no expectation of money at all, then streaming, which replaced no expectation with a rounding error. Direct support — Bandcamp, a self-hosted catalog, membership, buying the thing — is not nostalgia. It is the difference between three figures and three digits after the decimal.

The calculator makes that argument without me having to make it. It’s a number, on a page, that anyone can check.

Stack

An Astro component with the calculation logic factored into @steventrueba/shared so the math is testable and reusable — the same numbers power writing and conversations elsewhere.