BTC: Absolute Mean Block Interval Deviation

Bitcoin Absolute Mean Block Interval Deviation was 44.05 seconds on 7 Nov 2026 (latest daily value).

How far, in seconds, Bitcoin's average block interval was from 10 minutes each day, faster or slower.

Why use it. Large gaps mean hash rate is moving faster than difficulty can follow. How to read it. Zero means exactly on target; larger values mean a bigger gap, without saying whether blocks were faster or slower (the signed version shows that).

Calculation. Exact definition: How far each UTC day's mean signed block interval was from 600 seconds, in either direction. Zero means the day's mean interval was exactly 600 seconds; larger values mean a bigger departure, in seconds, without showing whether blocks were faster or slower. The signed mean-interval-minus-600 chart shows the direction. Full closed UTC days only, with no carry across missing inputs; canonical ancestry, source revisions, publication holds and weakest-input finality are inherited from the parent. abs(a - 600), where a is the daily mean signed block interval in seconds from our own validated Bitcoin Core node. The absolute value removes the sign, so means 60 seconds above or below 600 both give 60. Uses the existing 40-digit Decimal formulas.