Bitcoin Calculator & Converter – BTC to USD/Sats (Real-Time, Static HTML)

Version: 1.0.0

A real-time Bitcoin to USD and Satoshis converter. Single static HTML file with no build step or server required. Designed for WordPress shared hosting and any static web server.

Live Demo

sats.network

Features

• Real-time BTC price with 30-second auto-refresh
• Convert between Bitcoin (BTC), Satoshis (sats), and US Dollars (USD)
• 24-hour price change with percentage and dollar amount
• Manual refresh button for on-demand price updates
• Market statistics: Market Cap, 24h Volume, Circulating Supply, and BTC Dominance
• Quick example buttons (1 BTC, $1,000, 100M sats)
• Works on any static web hosting (no server needed)
• Mobile responsive design
• PWA-ready manifest

Price API Sources

The calculator fetches price data from multiple APIs with automatic failover. It stops at the first successful response to minimize API requests:

1. Coinbase - Fast, reliable price data with good CORS support
2. CoinGecko - Price + 24h change + market cap + volume
3. Kraken - Price + 24h change + volume
4. CoinCap - Price + 24h change + market cap + volume + supply
5. Blockchain.info - Price only (last resort)

If direct API calls are blocked by CORS, the calculator automatically retries through public CORS proxy services (corsproxy.io, allorigins.win).

Data Refresh Schedule

• Price: Every 30 seconds (stops at first successful API)
• Market stats: Once on page load, then every hour (all APIs queried in parallel)
• Manual refresh: Available via the refresh icon next to the 24h change

Fallback Behavior

When APIs don't return certain data, the calculator uses smart fallbacks:

• Market Cap: Estimated from current price and calculated circulating supply
• Circulating Supply: Calculated from Bitcoin's block reward schedule (anchored to a known supply value, accurate for years without updates)
• 24h Change: Cached from the initial stats fetch and reused across price refreshes
• Volume: Shows the last successfully fetched value during the session
• Dominance: Only shown when live data is available (no stale fallback)

Installation

1. Upload index.html and .htaccess to your web server
2. That's it. No dependencies, no build step, no Node.js required

WordPress / Shared Hosting

Upload both files to a directory on your server (e.g. /bitcoin-calculator/):

your-site.com/
  bitcoin-calculator/
    index.html
    .htaccess

The .htaccess file handles URL rewriting for clean URLs on Apache servers. If your hosting uses Nginx, you can skip that file.

Using a Different Folder Name

The .htaccess file is configured for a folder called /bitcoin-calculator/ by default. If you place the files in a differently named folder (or at the root of your domain), open .htaccess in a text editor and follow the instructions at the top of the file to update the folder path.

Tech Stack

• Vanilla JavaScript (no framework)
• Inline CSS (no external dependencies)
• Lucide Icons via CDN

License & Credits

Copyright (c) 2026 wBuild.dev (https://github.com/wbuilddev, https://sats.network) Licensed under the GNU General Public License v2.0 or later — see LICENSE file.

Built by wBuild.dev — WordPress Plugins & Web Tools. Every Plugin a W.

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