What is Bitcoin Halving Countdown?
A Bitcoin Halving Countdown computes bitcoin halving countdown from the inputs you provide. It applies the standard formula to the values you enter and returns the result instantly, without sending any data to a server. Past halvings table, current block height estimate, and historical price impact.
Bitcoin Halving Countdown
Live countdown to the next Bitcoin halving at block 1,050,000 (around April 2028). Block reward drops from 3.125 BTC to 1.5625 BTC.
TLDR
The next Bitcoin halving happens at block 1,050,000, estimated for around April 2028. The block reward drops from 3.125 BTC to 1.5625 BTC, cutting new bitcoin issuance in half. The countdown estimates from anchor block 840,000 (mined 2024-04-19 20:09 UTC) at the protocol's 10-minute target block time. Actual block times vary - the live block height and date are best-effort estimates; check mempool.space for the exact value.
Past and future halvings
| Halving | Block | Date | Reward (before -> after) | BTC price near event |
|---|---|---|---|---|
| 1st | 210,000 | 2012-11-28 | 50 -> 25 BTC | ~$12 |
| 2nd | 420,000 | 2016-07-09 | 25 -> 12.5 BTC | ~$650 |
| 3rd | 630,000 | 2020-05-11 | 12.5 -> 6.25 BTC | ~$8,800 |
| 4th | 840,000 | 2024-04-19 | 6.25 -> 3.125 BTC | ~$63,000 |
| 5th (est) | 1,050,000 | ~2028-04 | 3.125 -> 1.5625 BTC | ? |
| 6th (est) | 1,260,000 | ~2032-04 | 1.5625 -> 0.78125 BTC | ? |
Past halving price impact
2012 halving
Pre-halving: ~$12. 12 months after: ~$1,000. ROI: ~83x.
2016 halving
Pre-halving: ~$650. Cycle peak (Dec 2017): ~$19,800. ROI: ~30x.
2020 halving
Pre-halving: ~$8,800. Cycle peak (Nov 2021): ~$69,000. ROI: ~7.8x.
2024 halving
Pre-halving: ~$63,000. Current cycle in progress; price as of mid-2026: ~$95,000.
How to use this calculator
- Enter your inputs. Each field is labeled with its unit (dollars, percent, hash rate, etc.).
- Read the result instantly. Numbers update live as you type; no submit button.
- Stress-test by changing one input. Drop the rent 10%, raise the rate 1%, or shave the ARV. Watch what flips the verdict.
- Cross-check the formula below. Calculator math is open and matches the published formula exactly.
- Copy or screenshot for later. The site stores nothing; close the tab and inputs are gone.
About this tool + formula
Open math. The calculator runs entirely in your browser using the formula below. Nothing is sent to a server, nothing is logged, no signup required.
anchor_block = 840,000 (mined 2024-04-19 20:09 UTC) target_block = 1,050,000 seconds_per_block = 600 (10-minute target) estimated_current_block = anchor_block + floor((now - anchor_time) / 600) seconds_to_halving = (target_block - current_block) * 600 halving_date = anchor_time + (target_block - anchor_block) * 600
Real-world scenarios where this calculator helps
Tracking the four-year cycle
Bitcoin's price has historically followed a four-year cycle anchored on the halving. Knowing days remaining helps frame DCA or rotation strategies.
Mining payback planning
Miners model their payback against the post-halving reward. Buying ASICs in the 6 months before halving locks in a 50% lower revenue floor.
Newsletter / blog content scheduling
Crypto publishers schedule big content drops around the halving. Tracking the date helps editorial calendars.
Sat stacker motivation
DCA investors sometimes celebrate halving with extra-large buys. The countdown is a visual reminder.
What this tool does
- Estimates current block height from the 10-minute target time and the 2024 halving anchor.
- Computes blocks remaining until block 1,050,000 (the next halving).
- Counts down days, hours, minutes, seconds.
- Lists past + future halvings with reward, block height, and price near event.
- Shows historical price impact across the four prior cycles.
What it does NOT handle
- Doesn't query a live blockchain API. The countdown is an estimate; actual block times vary +/- a few percent over months.
- Doesn't predict price. The historical price column is reference only; future returns are not guaranteed.
- Doesn't account for protocol changes (none expected before next halving, but always possible).
- Doesn't track miner difficulty adjustments.
- Doesn't sync across timezones - times shown in UTC.
Common mistakes and pitfalls
- Assuming the halving happens exactly on the predicted date. Block times average 10 minutes but cluster +/- 2 weeks around the estimated date.
- Trading the halving day for instant returns. Historical halvings have been priced in well before; the cycle peak typically follows 12-18 months later.
- Confusing 'block reward' with 'transaction fees'. Miners earn both; only the block reward halves.
- Calling 21 million the supply cap as if it includes lost coins. Many BTC are permanently lost; circulating supply is lower.
- Treating halving cycles as guaranteed to repeat. Each cycle has been weaker (smaller multiples) than the prior. Past performance is not a guarantee.
Frequently asked questions
When is the next Bitcoin halving?
Estimated around April 2028 at block 1,050,000. Exact date depends on actual block times - watch mempool.space or blockchain.info for live updates.
What happens at a halving?
The block reward (the new bitcoin paid to miners for finding each block) gets cut in half. From 3.125 BTC to 1.5625 BTC at the next event. Halvings happen every 210,000 blocks (~4 years).
Why does Bitcoin halve?
Encoded in Satoshi's original protocol. Halvings enforce a fixed supply schedule that asymptotically approaches 21 million BTC total. Around 2140 the last fraction of a bitcoin will be mined.
Does halving cause price to go up?
Historically yes - cycle peaks have followed 12-18 months after each halving. The mechanism: lower new supply meeting steady or growing demand. But future cycles are not guaranteed to repeat.
How accurate is this countdown?
The estimate uses the 10-minute target and the 2024-04-19 anchor. Actual block times have averaged ~9.7 minutes over recent years, so the real halving may come slightly earlier than predicted.
What was the price at past halvings?
2012: ~$12. 2016: ~$650. 2020: ~$8,800. 2024: ~$63,000. Each halving was followed by a multi-quarter bull cycle ending in a peak 12-18 months later.
Will mining be profitable after halving?
Mining revenue from block rewards halves overnight. Some miners with high electricity costs are pushed offline. Difficulty adjusts down a few weeks later. Survivors get a larger network share. Use the mining profitability calculator to model your scenario.
How many halvings are left?
32 more halvings after the 2024 event. The 33rd halving (around year 2140) brings the reward effectively to zero, and the chain transitions fully to fee-only mining.
What is block 1,050,000?
The block at which the 5th halving fires. Each halving happens at multiples of 210,000 blocks. Block 1,050,000 is 5 * 210,000.
Where can I see the live block height?
mempool.space, blockstream.info, blockchair.com, blockchain.info. All show the live mined block - more accurate than this countdown's estimate.