What is a Bitcoin halving?

A halving is the event where the reward given to Bitcoin miners is cut in half. It happens approximately every four years and reduces the rate at which new Bitcoin enters circulation, which historically has been associated with price-cycle shifts.

How accurate is the Bitcoin halving countdown?

The countdown is based on live block height from Blockchain.info and the average block time. Because block times vary, the projected date updates continuously and is an estimate, not a fixed calendar date.

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Bitcoin Halving Countdown.

Real-time countdown to the next Bitcoin halving. Stock-to-flow ratio projection. Historical halvings (2012, 2016, 2020, 2024) overlaid on price.

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What is Bitcoin halving?

Block rewards are cut in half every 4 years

Bitcoin halving is a programmed event where the reward for mining new blocks is cut in half. This happens approximately every 210,000 blocks — roughly every 4 years.

When the reward halves, the rate of new Bitcoin entering circulation drops, making the asset increasingly scarce. This is a core part of Bitcoin's monetary policy, designed to create a deflationary digital currency with a capped supply of 21 million BTC.

210k

Blocks between halvings

~4 yrs

Average interval

21M

Max supply (BTC)

Understanding your results.

The dashboard shows the next halving countdown in days, blocks, and estimated date. The key metrics:

Current block reward — currently 3.125 BTC per block, dropping to 1.5625 BTC after the next halving
Stock-to-flow ratio — a measure of Bitcoin\'s scarcity that doubles every halving
Historical halvings — a timeline of past events with their effects on the market

Common mistake: expecting an immediate price pump after the halving. In previous cycles, the most significant price appreciation has occurred 6–18 months after the event, not on the day itself.

Signal: if you\'re planning to buy BTC, check the Swap Fee Comparator to see where you get the best rate.

How to use this tool.

The Bitcoin halving cuts the block reward in half roughly every four years. This dashboard shows the next event's date, current block height, the time until halving, and the projected reward drop (currently 3.125 BTC → 1.5625 BTC).

Historical halvings: 2012 (50 → 25), 2016 (25 → 12.5), 2020 (12.5 → 6.25), 2024 (6.25 → 3.125), 2028 (3.125 → 1.5625). Block time is kept at ~10 minutes via the difficulty adjustment algorithm.

Pro tip: the halving's effect on price is heavily debated. Historically, bull runs have started 6–12 months after the halving, not before. Use the countdown to plan DCA schedules, not to time the market.

Prepare for the next halving

Halvings historically drive price appreciation. Make sure you're ready to trade or hold:

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Privacy & safety.

Data sourced from Blockchain.info and CoinGecko. All calculations happen client-side. No personal data is collected.

Not investment advice. This tool provides information about Bitcoin\'s supply schedule. Investment decisions should be based on your own research and risk tolerance.

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Avoid these mistakes

Don't buy solely because of the halving. The halving reduces supply growth, but price is determined by supply AND demand. Past halvings have been followed by bull runs, but past performance is not a guarantee.
Avoid the "sell the news" trap. If everyone expects a post-halving rally, the rally may already be priced in by the time the halving occurs.

If you prefer to trade the cycle

Use our Swap Fee Comparator to find the lowest-fee exchanges for executing your trades. For long-term holdings, withdraw to a hardware wallet like Ledger — don't leave significant positions on exchanges.

Frequently asked questions.

When is the next Bitcoin halving?

The next halving is estimated to occur in April 2028 at block height 1,050,000 (approximately). The exact date depends on block production speed, which can vary. The current block reward of 3.125 BTC will be cut to 1.5625 BTC.

How does the halving affect Bitcoin's price?

The halving reduces the rate at which new BTC is created, cutting the supply inflation rate in half. Historically, bull runs have started 6–12 months after each halving event (2012, 2016, 2020, 2024). However, past performance does not guarantee future results. The market may already price in expected halvings.

What is stock-to-flow and how does it relate to halving?

Stock-to-flow (S2F) is a model that divides the existing supply of Bitcoin (stock) by the annual production (flow). Each halving cuts the flow in half, doubling the S2F ratio. Proponents argue this scarcity drives long-term price appreciation. Critics note the model has been inaccurate during bear markets. Our tool shows the current S2F ratio so you can evaluate the model yourself.

How many halvings have there been so far?

There have been 4 halvings: 2012 (50→25 BTC), 2016 (25→12.5), 2020 (12.5→6.25), and 2024 (6.25→3.125). The next will be in 2028. After 2140, all 21 million BTC will have been mined and there will be no more block rewards — miners will rely entirely on transaction fees.

Should I buy Bitcoin before or after the halving?

Historically, buying 6–12 months before the halving and holding for 12–18 months after has been the most profitable strategy. The "buy the rumor, sell the news" effect has been weaker for halvings than for other crypto events. If you're planning to buy, use the <a href="/tools/swap-fee-comparator/" class="text-brand-teal hover:underline">Swap Fee Comparator</a> to find the cheapest place to buy BTC with the lowest fees.

What happens to miners after the halving?

Miners' revenue is cut in half overnight. Less efficient miners (higher electricity costs, older hardware) may become unprofitable and shut down, which causes the network hashrate to drop temporarily. The difficulty adjustment algorithm then reduces mining difficulty, restoring profitability for remaining miners. This natural cycle has happened after every halving.

Does the halving affect other cryptocurrencies?

Indirectly, yes. Bitcoin's halving often triggers a "halving season" where attention and capital flow into the entire crypto market. Altcoins like Ethereum, Solana, and others tend to rally alongside BTC after halvings. Some cryptocurrencies (like Litecoin, Bitcoin Cash) have their own halving schedules that follow similar patterns.

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