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 19, 2024), 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.

Will the block reward ever reach zero?

Yes. After 33 halvings (around the year 2140) the reward becomes less than 1 satoshi and effectively reaches zero. By that point, roughly 99.9% of all 21 million BTC will have been mined.

Is this countdown exact?

No. The current block height is estimated using the 10-minute average from the last known halving block. Real block times vary, so the estimate may be off by hundreds of blocks. For precision, check a live Bitcoin block explorer.

Bitcoin Halving Countdown

Name: Bitcoin Halving Countdown
Availability: InStock
Author: Nham Vu

Live countdown to the next Bitcoin halving, with blocks remaining, estimated date, current block height, and the full halving history.

Next Halving — Block 1,050,000

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

Days

Hours

Mins

Secs

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

Blocks Remaining

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Est. Current Block

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Est. Halving Date

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Halving History

#	Block	Date	Reward

Halvings occur every 210,000 blocks (~4 years). The 5th halving row shows the estimated date based on a 10-minute average block time.

Summary

Live countdown to the next Bitcoin halving, with blocks remaining, estimated date, current block height, and the full halving history.

How it works

The tool calculates the estimated current block height based on the known 4th halving block and 10-minute average block time.
It determines blocks remaining until block 1,050,000 (the 5th halving).
The estimated date is derived by multiplying remaining blocks by the 10-minute average.
The countdown timer ticks in real time, subtracting one block every 10 minutes on average.
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.
Plan long-term BTC investment strategy around supply shock events.
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.
Estimate mining revenue changes after the next halving.

Frequently Asked Questions

Last updated: 2026-07-08 · Reviewed by Nham Vu