How often does the Bitcoin halving happen?

Every 210,000 blocks, which works out to roughly four years at Bitcoin's targeted 10-minute average block time, though the actual gap between halvings has run shorter than four years historically because average block production has generally run faster than the 10-minute target.

What actually happens to the block subsidy at a halving?

The subsidy miners earn for adding a new block is cut exactly in half, starting from the original 50 BTC. It has already stepped down to 25, then 12.5, then 6.25, then 3.125 BTC, and keeps halving on the same 210,000-block schedule until it reaches zero, expected around the year 2140.

Bitcoin Halving Countdown & Block Subsidy Calculator

Enter The Current Block Height

Your Result

Enter the current block height and click Calculate to see the blocks remaining, an estimated date, and the block subsidy before and after the halving.

How this is calculated

The halving interval is fixed at exactly 210,000 blocks. This is a rule written into Bitcoin's consensus code, not an estimate. Every 210,000 blocks, the block subsidy paid to miners is cut in half.
The subsidy math uses the same integer arithmetic the protocol itself uses, expressed in satoshis and right-shifted per halving era, not a floating-point 50 divided by 2 repeated. That is why the subsidy eventually reaches exactly zero (expected around block 6,930,000, roughly the year 2140) instead of shrinking forever without ever quite hitting it.
The days-remaining figure is an estimate, not a countdown clock. It multiplies the blocks remaining by the average minutes per block you enter. Real block times vary block to block and the network-wide average shifts with total hash rate and the difficulty adjustment, so treat the estimated date as a moving target that tends to firm up as the halving gets closer.
Current era counts how many halvings have already happened, starting from era 0 (the original 50 BTC subsidy, blocks 0 to 209,999).
This tool does not fetch a live block height for you. Pull the current number from any block explorer first, since a stale figure will throw off both the blocks-remaining count and the estimated date.

Risk & liability disclaimer: This calculator produces a mathematical estimate based on the block height and average block time you enter. It is not financial advice and does not guarantee any trading or investment outcome, and a halving event itself does not guarantee any particular price reaction. Cryptocurrency trading involves substantial risk of loss, including total loss of principal, and is not suitable for everyone. Trading Habits is not a broker-dealer, registered investment adviser, or tax professional, and is not affiliated with any exchange, protocol, or data provider. Always verify the current block height independently from a block explorer before relying on this estimate.

How many blocks and days are left until the next Bitcoin halving?

Enter The Current Block Height

Your Result

How this is calculated

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