Bitcoin Halving & Supply Clock
Track current block height, halving progress, subsidy and an estimated next-halving date.
SOURCE: MEMPOOL.SPACE. FETCHED ON LOAD OR REFRESH, NOT A LIVE STREAM. ETA USES THE HEIGHT TIMESTAMP AND ASSUMED BLOCK INTERVAL.
Bitcoin Halving & Supply Clock calculation coverage
- 01
Public block-height refresh
- 02
210,000-block eras
- 03
Subsidy and ETA
Date is an estimate based on average block time. Block production varies continuously.
About this tool
A Bitcoin halving clock tracks the 210,000-block subsidy schedule using a public block-height lookup or a height you enter. It estimates time to the next halving from an assumed block interval and shows the block subsidy, excluding transaction fees. The date is not fixed.
How it works
The halving era is the integer part of block height divided by 210,000. Remaining blocks are multiplied by the assumed average block interval, ten minutes by default, for the date estimate. Subsidy halves at each completed era.
| Parameter | How it is used |
|---|---|
| Block height | Locates the network in the current halving era. |
| Era length | Uses Bitcoin's 210,000-block subsidy interval. |
| Block subsidy | Shows new bitcoin issued per valid block before fees. |
| Average block time | Estimates calendar time for remaining blocks. |
From block height to remaining time
An illustrative height of 1,000,000 and an assumed ten-minute block interval. This is not a claim about the current live height.
Next halving height = 1,050,000. Remaining blocks = 50,000. 50,000 × 10 minutes = about 347.22 days.
At that height, the subsidy is 3.125 BTC and the next era begins with 1.5625 BTC per block, excluding fees.
The height is the schedule; the calendar date is an estimate. A manual or unavailable height must not be presented as live data.
How to use this tool
- Let the public block-height source refresh or enter a verified height manually.
- Review blocks remaining, progress percentage and current subsidy.
- Treat the displayed date as an estimate because block production varies.
Frequently asked questions
How often does a Bitcoin halving occur?
A halving occurs every 210,000 blocks, which has historically been roughly four years but is defined by blocks rather than calendar time.
Why does the estimated date change?
Blocks do not arrive exactly every ten minutes. Hash rate and difficulty adjustments change the pace, so the projection updates.
Does the block subsidy include transaction fees?
No. The subsidy is newly issued bitcoin. Miners may also receive transaction fees from included transactions.