What is Bitcoin halving?

It's a programmed event, roughly every four years (every 210,000 blocks), where the reward miners receive for confirming a block is cut in half.

How is the countdown calculated?

It estimates the time remaining based on the current block height, the target halving block, and the average time per block (about 10 minutes).

Why does halving matter for Bitcoin's supply?

It slows the rate of new coin issuance over time, which is central to Bitcoin's fixed total supply cap of 21 million coins.

Bitcoin Halving Countdown Calculator

Bitcoin's block reward is cut in half every 210,000 blocks (roughly every 4 years) — an event known as 'the halving,' which reduces the rate of new bitcoin issuance.

Current Block Height

Instant Result

Next Halving Block -

Blocks Remaining -

Estimated Time Remaining (days) -

What Is a Bitcoin Halving Countdown Calculator?

Bitcoin's block reward is cut in half every 210,000 blocks (roughly every 4 years) — an event known as 'the halving,' which reduces the rate of new bitcoin issuance. This calculator estimates how many blocks and roughly how many days remain until the next halving, based on the current block height.

How to Use This Bitcoin Halving Countdown Calculator

Enter the current Bitcoin block height (available from any blockchain explorer).
Click Calculate to see the next halving block, how many blocks remain, and the estimated time remaining, assuming an average 10-minute block time.

Formula

Next Halving Block = the next multiple of 210,000 above the current block
Blocks Remaining = Next Halving Block − Current Block
Estimated Days = Blocks Remaining × 10 minutes ÷ 1,440 minutes/day

Worked Example

At block height 850,000, the next halving occurs at block 1,050,000. Blocks Remaining = 1,050,000 − 850,000 = 200,000 blocks. Estimated Time ≈ 200,000 × 10 minutes ≈ 1,388.9 days (about 3.8 years), though actual block times vary with network hash rate.