Bitcoin Supply & Scarcity
Track Bitcoin's circulating supply, estimated lost coins, mining schedule, and see your holdings as a percentage of the total 21 million hard cap.
Bitcoin’s supply is capped at 21 million coins, with over 19.8 million already mined and millions more permanently lost. This calculator shows circulating supply, remaining issuance, the next halving’s effect and what percentage of all Bitcoin your own holding represents.
Bitcoin Supply
Your BTC Holdings
Enter your BTC to see what percentage of total supply you own.
Estimated Lost Bitcoin
~3.7M BTC
Estimated permanently lost
~1.1M BTC
Satoshi's unmoved coins
~16.4M
Effective circulating supply
Bitcoin Supply Schedule (2009–2140)
Next Halving
Block 1,050,000
Target block height
84,540
Blocks remaining
Apr 2028
Estimated date
The 21 Million Hard Cap & Scarcity Lifecycle
Deep dive into Bitcoin's issuance schedule, lost coins, and illiquid supply metrics.
Estimated Lost Coins
It is estimated that roughly 3.7 to 4 million BTC are lost forever due to forgotten keys, death, or Satoshi's untouched stash. This effectively reduces the circulating supply to approximately 17 million BTC.
Illiquid Supply Growth
Illiquid supply tracks Bitcoin held by entities that rarely sell. Historically, price appreciation correlates strongly with the movement of supply from exchanges to long-term 'cold' storage.
Bitcoin Supply Calculator
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01
View Live Supply
Auto-loads the current circulating supply, percentage mined, and remaining BTC from the mempool.space API.
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Explore the Supply Curve
The chart shows how Bitcoin's issuance tapers towards 21 million, with halvings every ~4 years cutting new supply by 50%.
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03
Check Your Stack %
Enter your BTC holdings to see what percentage of the total supply you own. Even 0.01 BTC makes you a top percentile holder.
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04
Understand Scarcity
With ~3–4M BTC lost forever, effective supply is closer to 17–18M. BTC is scarcer than gold by stock-to-flow ratio.
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Frequently Asked Questions
Everything you need to know about Bitcoin supply and mining
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Bitcoin Halving Explained: Supply Scarcity Impact
Understand how halvings reduce supply and drive Bitcoin's deflationary model
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Disclaimer
Lost BTC estimates are approximations from industry research (Chainalysis, Glassnode). Actual lost supply may vary. Supply schedule math is deterministic from Bitcoin's code. This is not financial advice.