How often does the Bitcoin halving happen?

The block subsidy halves every 210,000 blocks. At the target ten-minute block time that works out to roughly every four years. Past halvings landed in 2012, 2016, 2020, and 2024.

How is the next halving date estimated?

The tool multiplies the blocks remaining by the ten-minute target interval to get an elapsed time, then adds it to today. Because real block intervals fluctuate around ten minutes, the date is an estimate that can drift by days or weeks as hashrate changes.

What is the current block subsidy?

Subsidy starts at 50 BTC and halves each era, computed with integer satoshi division as the consensus rules require. After the 2024 halving it was 3.125 BTC per block, and it will fall to 1.5625 BTC at the next one.

When does the subsidy reach zero?

Because the subsidy is integer satoshi division, it rounds to zero after about 33 halvings, near block 6,930,000, which is expected around the year 2140. After that, miners are paid only by transaction fees.

Why does the halving matter for price?

Each halving cuts the rate of new supply entering the market in half. Historically these supply shocks have preceded major bull runs, though correlation is not causation and past cycles do not guarantee future returns.

Bitcoin Halving Countdown

The halving is Bitcoin’s metronome: every 210,000 blocks the reward miners earn for each block is cut in half, slowly choking off new supply. This countdown tells you exactly how many blocks and roughly how many days stand between now and the next one, straight from the block height.

How it works

The reward era is the block height divided by 210,000, rounded down. The subsidy for an era is 50 BTC divided by two raised to the era number, using integer satoshi division to match consensus exactly. The next halving height is simply the start of the next era — one more than the current era, times 210,000. Subtracting the current height gives the blocks remaining.

To turn blocks into time, the tool multiplies the remaining blocks by Bitcoin’s ten-minute target interval and adds the result to today’s date. It then displays the current subsidy alongside the post-halving subsidy so you can see the supply cut at a glance, plus a table of the four halvings that have already happened.

Example and notes

At a height of 900,000 the network is in the fifth reward era with a 3.125 BTC subsidy; the next halving sits at block 1,050,000, and the tool counts the blocks and days down to it before the reward drops to 1.5625 BTC. Keep in mind the date is only as good as the ten-minute assumption — sustained hashrate growth shortens intervals and pulls the halving slightly earlier than a naive estimate.