The Bitcoin Unit Guide

Bitcoin explained clearly,
one unit at a time

Plain English guides for anyone learning to understand Bitcoin — from what a satoshi is to how Lightning works and what your tax obligations are.

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Featured Basics

What is a Satoshi? Bitcoin's Smallest Unit Explained

A satoshi is to Bitcoin what a cent is to a dollar. Here's everything you need to know — what sats are, how to convert them, and why they matter more than ever.

Feb 19, 2026 ⏱ 5 min
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Units & Math
Satoshi to USD: How to Convert Sats to Dollars
The quick, accurate way to convert satoshis to US dollars. Includes the formula, a worked example, and a live converter tool.
Feb 24, 2026 ⏱ 4 min
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Units & Math
Bitcoin Units: The Complete Guide to BTC, mBTC, Bits and Sats
Everything you need to know about Bitcoin's unit system — from whole BTC down to satoshis — with a full conversion table and plain English explanations.
Feb 23, 2026 ⏱ 6 min
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Units & Math
What is mBTC? Millibitcoin Explained Simply
mBTC stands for millibitcoin — one thousandth of a Bitcoin. Here's what it means, how to convert it, and when you'll encounter it.
Feb 22, 2026 ⏱ 4 min
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For Merchants
How to Accept Bitcoin at Your Small Business
A practical guide for small business owners who want to start accepting Bitcoin payments. Covers Square, Shopify, Lightning wallets, and what to do at tax time.
Feb 21, 2026 ⏱ 7 min
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Basics
Bitcoin Wallets for Beginners: What They Are and How to Choose One
A Bitcoin wallet does not store Bitcoin — it stores the keys that prove ownership. Here is what you actually need to know before choosing one.
Feb 20, 2026 ⏱ 6 min
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For Merchants
Understanding Lightning Invoices on Square
What a Lightning invoice is, how it gets paid, and what shows up in your Square dashboard afterward. A practical guide for Square merchants.
Feb 18, 2026 ⏱ 5 min
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Lightning
How Lightning Payments Work: A Plain English Guide
Lightning is Bitcoin's payment layer — instant, cheap, and confusing at first. Here's what's actually happening when you pay with sats.
Feb 15, 2026 ⏱ 7 min
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Taxes
How to Record Bitcoin Payments for Your Taxes
Every Bitcoin payment you receive is taxable income. The IRS wants the dollar value at the time of receipt. Here is exactly how to track it.
Feb 10, 2026 ⏱ 6 min
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Units & Math
mBTC, Bits, Satoshis: Every Bitcoin Unit Explained
Beyond BTC and sats, there are more units you might encounter. Here is the complete guide with conversion table and when to use each.
Feb 5, 2026 ⏱ 5 min