Bitcoin Halving Calculator
Calculate when the next Bitcoin halving will occur, how many blocks remain, and explore the complete halving history.
Quick Answer
Bitcoin halves its block reward every 210,000 blocks (approximately every 4 years). The most recent halving occurred in April 2024, reducing the reward from 6.25 to 3.125 BTC. The next halving is expected around early 2028, when the reward will drop to 1.5625 BTC per block.
Fixed by the Bitcoin protocol
Halving Countdown
Progress to Halving #5
Bitcoin Halving History
| Event | Block | Date | Reward (BTC) |
|---|---|---|---|
| Genesis | 0 | 2009-01-03 | 50.000 |
| 1st Halving | 210,000 | 2012-11-28 | 25.000 |
| 2nd Halving | 420,000 | 2016-07-09 | 12.500 |
| 3rd Halving | 630,000 | 2020-05-11 | 6.250 |
| 4th Halving | 840,000 | 2024-04-19 | 3.125 |
| 5th Halving (est.) | 1,050,000 | ~2028 | 1.563 |
About This Tool
The Bitcoin Halving Calculator helps you track and estimate when the next Bitcoin block reward halving will occur. Bitcoin halvings are among the most anticipated events in cryptocurrency, reducing the rate of new BTC creation by 50% approximately every four years. This deflationary mechanism is hardcoded into Bitcoin's protocol and is a fundamental part of its monetary policy, capping the total supply at 21 million BTC.
What Is a Bitcoin Halving?
A Bitcoin halving is a programmatic event that occurs every 210,000 blocks, reducing the block reward that miners receive for validating transactions and adding new blocks to the blockchain. When Bitcoin launched in January 2009, miners received 50 BTC per block. The first halving in November 2012 reduced this to 25 BTC, the second in July 2016 to 12.5 BTC, the third in May 2020 to 6.25 BTC, and the fourth in April 2024 to 3.125 BTC. This process will continue until approximately the year 2140, when the reward effectively reaches zero and all 21 million BTC will have been mined.
Why Do Bitcoin Halvings Matter?
Halvings are significant because they directly impact Bitcoin's supply issuance rate and, by extension, its inflation rate. Before the 2024 halving, approximately 900 new BTC were created daily; after, that dropped to about 450. This supply reduction, combined with steady or increasing demand, has historically preceded significant price increases. However, it is critical to note that correlation does not imply causation, and many other factors influence Bitcoin's price including macroeconomic conditions, regulatory developments, institutional adoption, and market sentiment. The efficient market hypothesis suggests that predictable events like halvings should be priced in well before they occur.
How the Calculator Works
This calculator takes the current Bitcoin block height (which you can look up on any block explorer like blockchain.com or mempool.space) and calculates how many blocks remain until the next 210,000-block milestone. It estimates the halving date by multiplying the remaining blocks by the average block time of 10 minutes. In practice, block times fluctuate based on mining difficulty adjustments that occur every 2,016 blocks. If more miners join the network, blocks are found faster temporarily until difficulty adjusts upward, and vice versa. This means the estimated date can shift by days or weeks as network hashrate changes.
Historical Halving Impact on Price
Each previous halving has been followed by a significant bull run, though the magnitude and timing have varied. After the 2012 halving, Bitcoin rose from about $12 to over $1,000 within a year. After the 2016 halving, it went from roughly $650 to nearly $20,000 by late 2017. After the 2020 halving, it climbed from around $8,700 to an all-time high of over $69,000 in November 2021. The 2024 halving saw Bitcoin already near its all-time highs before the event. Historical patterns are interesting for context but should not be used as the basis for investment decisions, as the market matures and becomes more efficient with each cycle.
Impact on Bitcoin Mining
Halvings have a direct impact on Bitcoin mining economics. When the block reward is cut in half, miners with higher operational costs (especially electricity) may become unprofitable and shut down, potentially causing a temporary decrease in network hashrate. However, this triggers a difficulty adjustment that makes mining easier for remaining miners, eventually reaching a new equilibrium. Over time, miners increasingly rely on transaction fees rather than block rewards for revenue. The long-term sustainability of Bitcoin's security model depends on transaction fees being sufficient to incentivize mining once block rewards become negligible.
The Road to 21 Million
Bitcoin's total supply is capped at 21 million coins, and halvings are the mechanism that ensures this cap is approached asymptotically. As of early 2026, approximately 19.8 million BTC have been mined — about 94% of the total supply. The remaining 1.2 million BTC will be distributed over the next 114 years through ever-decreasing block rewards. By 2032 (after the 6th halving), over 99% of all Bitcoin will have been mined. The last satoshi (the smallest unit of BTC) is expected to be mined around the year 2140. This predictable, transparent monetary policy is one of Bitcoin's most distinctive features compared to fiat currencies with discretionary monetary policy.