What is a Bitcoin halving?

Every 210,000 blocks, the reward miners receive for adding a new block is cut in half. This reduces the rate at which new BTC enter circulation and is written into the Bitcoin protocol itself.

Why every 210,000 blocks and not a fixed date?

Bitcoin targets a 10-minute average block time, but actual times vary. The halving is triggered by block count, not calendar time, so the exact date can shift by days or weeks.

When is the next halving?

The 5th halving occurs at block 1,050,000. Based on the 10-minute average block time from the 4th halving (April 20, 2024 UTC), it is estimated around April 2028 — but the actual date depends on the real hash rate and block times between now and then.

How many halvings have happened?

Four halvings have occurred so far: November 2012, July 2016, May 2020, and April 2024. The block reward went from 50 BTC → 25 → 12.5 → 6.25 → 3.125 BTC.

How many halvings are left for Bitcoin?

Under Bitcoin consensus rules, the subsidy halves every 210,000 blocks until integer satoshi arithmetic yields zero at block 6,930,000 (the 33rd reduction). Following the 4th halving in April 2024, 29 subsidy reductions remain; after the 5th halving, 28 will remain.

Will the block subsidy ever reach zero?

Yes. Bitcoin Core calculates subsidy by repeatedly halving the original 50 BTC amount in whole satoshis. At block 6,930,000 the calculated subsidy reaches zero.

Is this countdown live or exact?

No. This page does not query the Bitcoin network. It extrapolates from the displayed observation and average block interval. Enter a freshly verified height for a better estimate; the actual event occurs when block 1,050,000 is mined.

Bitcoin Halving Countdown

Estimate the countdown to Bitcoin block 1,050,000 using a block height you verify, its observation time, and an adjustable average block interval.

Next Halving — Block 1,050,000

5th halving · reward drops from 3.125 BTC to 1.5625 BTC

Estimator inputs — no live chain request

Observed block height Observed at (your local time) Average minutes / block

Days

Hours

Mins

Secs

Halving 4 (Block 840,000) Halving 5 (Block 1,050,000)

Blocks Remaining

—

Projected Block Now

—

Est. Halving Date (UTC)

—

Estimated Daily Issuance & Subsidy Reduction

3.125 → 1.5625 BTC

Current Issuance

—

After 5th Halving

—

Estimated Reduction

—

Calculated from 144.0 estimated blocks/day using your selected average interval. This is a subsidy issuance estimate, not a price or miner-revenue forecast.

Halving History

#	Block	Date (UTC)	Reward

Halvings occur every 210,000 blocks (~4 years). The 5th halving row uses your selected average block interval.

Summary

Bitcoin's block subsidy halves every 210,000 blocks. The next event is determined by block height, not a fixed calendar date. This private, browser-only estimator starts from block 840,000 and lets you replace its baseline with a block height and timestamp checked on your preferred node or explorer.

How it works

The initial baseline estimates block height from confirmed block 840,000 and a 10-minute average interval; it is not live chain data.
For a fresher estimate, enter a block height checked on a Bitcoin node or explorer and the exact time you observed it.
It determines blocks remaining until block 1,050,000 (the 5th halving).
The estimated date is derived by multiplying remaining blocks by the selected average block interval.
The countdown advances from that observation using your chosen average minutes per block.
The historical table shows every past halving: block height, date, and pre/post block reward.

Use cases

Track how many blocks remain until the next Bitcoin halving.
Compare estimated dates under faster or slower average block intervals.
Understand how Bitcoin's fixed supply schedule is enforced.
Quickly share the next halving date with others.
Study the historical timeline of all past halvings.
See the protocol subsidy change at the next halving; this is not a price or mining-profit forecast.

Frequently Asked Questions

Last updated: 2026-10-05 · Reviewed by Nham Vu