Bitcoin Halving Countdown

Estimate how long until the next Bitcoin halving from the current block height. Enter the latest height and average block time, then press Calculate.

Written by TopicDrill Editorial Team·Updated June 2026

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Progress through this halving epoch

28.6%

840,0001,050,000

How the halving countdown works

Bitcoin schedules its halvings by block height, not by the calendar. Every 210,000 blocks the reward paid to miners is cut in half. This tool finds the next 210,000 block milestone above the height you enter and counts how many blocks are still to be mined.

To turn blocks into time, it multiplies the blocks remaining by your average block time. The network aims for one block roughly every 10 minutes, so 10 is a sensible default, but you can adjust it if the chain has been running faster or slower than usual.

A quick example

If the current height is 900,000, the next halving lands at block 1,050,000, which is 150,000 blocks away. At 10 minutes each that is about 1.5 million minutes, or roughly 1,041 days, which the tool turns into a projected calendar date for you.

Things to keep in mind

The result is an estimate that shifts as the real block pace changes. For the authentic protocol rules behind halvings, the official Bitcoin project site is a good reference. Explore more crypto math with our other free calculators.

Frequently asked questions

What is the Bitcoin halving?

Roughly every 210,000 blocks, about every four years, the reward miners receive for adding a block is cut in half. This slows the rate at which new bitcoin enters circulation and is written into the Bitcoin protocol.

How is the next halving date estimated?

The countdown finds the next block height that is a multiple of 210,000, subtracts the current height to get blocks remaining, then multiplies by the average block time. Because block times vary around the 10 minute target, the date is an estimate, not a fixed appointment.

What happens to the block reward at a halving?

The block subsidy is divided by two. It started at 50 BTC, then fell to 25, 12.5, 6.25 and 3.125, and it keeps halving until it approaches zero. After that, miners are rewarded mainly through transaction fees.

Why is the countdown only approximate?

Blocks are not produced exactly every 10 minutes. Hash rate changes and the difficulty adjustment make the real pace drift, so the projected date can move by days or weeks as the network speeds up or slows down.

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