₿ Bitcoin Halving
Track the next Bitcoin halving — live block countdown, estimated date, supply curve, and full halving history.
| Halving # | Block Height | Block Reward | Est. Date | Status |
|---|---|---|---|---|
| Genesis | 0 | 50 BTC | 2009-01-03 | ✓ Completed |
| #1 | 210,000 | 25 BTC | 2012-11-28 | ✓ Completed |
| #2 | 420,000 | 12.5 BTC | 2016-07-09 | ✓ Completed |
| #3 | 630,000 | 6.25 BTC | 2020-05-11 | ✓ Completed |
| #4 | 840,000 | 3.125 BTC | 2024-04-20 | ✓ Completed |
| #5 | 1,050,000 | 1.5625 BTC | 2028-04-17 | ◎ Upcoming |
| #6 | 1,260,000 | 0.78125 BTC | 2032-04-15 | ◎ Upcoming |
| #7 | 1,470,000 | 0.390625 BTC | 2036-04-13 | ◎ Upcoming |
| #8 | 1,680,000 | 0.1953125 BTC | 2040-04-11 | ◎ Upcoming |
| #9 | 1,890,000 | 0.09765625 BTC | 2044-04-09 | ◎ Upcoming |
Understanding the Halving
Every 210,000 blocks (~4 years), the Bitcoin protocol automatically cuts the block reward in half. This event — called the "halving" — is hard-coded into Bitcoin's consensus rules. It's the primary mechanism that enforces Bitcoin's fixed 21 million coin supply cap.
When the block reward halves, miners receive 50% fewer BTC per block. If the BTC price doesn't increase proportionally, mining profitability decreases. Historically, halvings have been followed by significant price appreciation as reduced supply growth meets sustained or growing demand.
Bitcoin mines a new block approximately every 10 minutes on average. The exact timing depends on the live network hashrate and difficulty adjustments. The estimated date is calculated as: blocks remaining × 10 minutes, added to the current time. It changes slightly with every new block.
After 33 halvings (around the year 2140), the block reward drops below 1 satoshi and effectively becomes zero. After that, miners are compensated solely through transaction fees. By this point, ~99.97% of all 21 million BTC will already have been mined.