Bitcoin Halving Countdown
Bitcoin halving countdown
Current block
Halving block
Blocks remaining
Estimated date
Reward now
Reward after
The block height is live; the date is an estimate only. It assumes Bitcoin's ten-minute target block time, and real blocks arrive faster or slower as hash rate changes, so the estimate moves — currently about 618 days out. Halvings completed so far: 4. The block interval (210,000) and the subsidy schedule are fixed in Bitcoin's consensus rules, so those figures are exact rather than forecast.
Updated 1 min ago Source: mempool.space
What a halving is
Every 210,000 blocks — roughly every four years — the reward paid to Bitcoin miners for producing a block is cut in half. This is not a policy decision anyone makes; it is written into Bitcoin’s consensus rules, which is why the schedule is known in advance and why the total supply converges on 21 million coins. The counter above reads the current block height from the live chain and works out how far the next halving is.
How to read the numbers
The current block, halving block and blocks remaining are exact. So are the reward figures: the subsidy started at 50 BTC and has halved at each interval, so the current and next values are arithmetic, not estimates.
The estimated date is genuinely an estimate, and we label it as one. It assumes Bitcoin’s ten-minute target block time, but real blocks arrive faster when hash rate is growing and slower when it falls, and difficulty only readjusts about every two weeks. Over tens of thousands of blocks those deviations accumulate, so the estimate will drift by days as the date approaches. Anyone presenting a halving date to the hour is overstating what can be known.
Why it matters — and the part usually oversold
The direct effect is on miners. Their revenue per block halves overnight while their electricity and hardware costs do not, so the least efficient operations become unprofitable and either upgrade or shut down. That is a real, mechanical consequence, and it is why hash rate and miner behaviour are worth watching around a halving.
The indirect claim — that a halving reliably causes a price rise — is far weaker than the confidence with which it is usually stated. There have been only a handful of halvings, each in very different market conditions, which is nowhere near enough to establish a pattern. The event is public knowledge years ahead, so any effect could already be reflected in the price. We report the schedule because it is a fact; we do not forecast what it does to the price, and we would be sceptical of anyone who does.
Frequently asked questions
How accurate is the date? Within days rather than hours, and it moves. The block count is the reliable part.
What happens when the subsidy reaches zero? Miners are paid from transaction fees alone. That is expected around 2140, and how well it works is an open question rather than a settled one.
Where does the block height come from? The live chain tip via mempool.space, with blockchain.info as a fallback. If both are unavailable this page shows nothing rather than a guess.