Put a coast line on your site.
A live badge that shows a crossing age and links back to the calculator. Three styles, one line of code, free forever. Your readers click it, wake up on the sea, and blame you fondly.
Build your badge.
Three styles, two themes, three accents. The preview is the real badge - what you ship is what your readers see.
Badges without numbers show the default crossing (42) and invite readers to find theirs.
<iframe src="https://coastfirecalculator.net/badge/card?theme=dawn&accent=ember" width="600" height="340" style="border:0;border-radius:20px;overflow:hidden;background:transparent" loading="lazy" title="Coast FIRE badge - find your crossing age"></iframe>
Three small requests.
Free forever
Personal and commercial blogs, newsletters, forums - if it lives on the web, the badge is free there.
Keep the link
The attribution link back to the calculator is the whole deal. Don’t strip it, don’t bury it.
Don’t reskin or resell
Customize the theme and accent only. The sunrise stays ours.
That’s it. Go make the internet’s money prettier.
Steal the sunrise.
Writing about the calculator? Everything below is fair game - download it, drop it in your post, link home.
Before you paste.
No cookies, no analytics beacons in the iframe. A pageview of the badge route is the only signal - the same one your server already sees for every image you host.