Fees and Transaction Priority
8 min readinteractiveIncludes quiz · 3 questions
Bitcoin fees are an auction. You are bidding for limited block space against every other transaction in the world. When blocks are full, fees spike. When blocks are empty, fees drop to near zero. Understanding this market saves you money.
How vbytes, feerate (sat/vB), and mempool congestion determine speed and cost.
Key Takeaway
Check mempool.space before sending any transaction. It shows current fee rates and estimates. Waiting even a few hours for lower fees can save you 50-90% on transaction costs.
Test Your Knowledge
3 questions · Passing score: 75%
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