Next Bitcoin halving
Every 210,000 blocks, the reward for mining a block is cut in half. That's why there will never be more than 21 million bitcoin.
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How much is already mined?
Total bitcoin over time. Half of all coins were mined in the first 4 years. The last satoshi comes in block 6,929,999, around the year 2140.
Every halving
Past dates are real. Future dates assume 10-minute blocks, so they drift.
| # | Block | Year | Reward (BTC) | Total at end (BTC) |
|---|
Questions
What happens at the halving?
Miners get half as much new bitcoin for each block. Fees from transactions are not affected. Nothing else changes, and no one has to do anything.
Why is the date only an estimate?
The halving happens at a block height, not on a date. Blocks come about every 10 minutes on average, but faster or slower runs move the date by days or weeks.
Why does it stop at 21 million?
The reward started at 50 BTC and halves every 210,000 blocks. After 33 halvings it drops below one satoshi, the smallest unit, so it becomes zero. The total adds up to just under 21 million (20,999,999.9769 BTC).