Digital Root Calculator

dr(n) = 1 + (n−1) mod 9

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About Digital Root Calculator

A digital root calculator computing the iterative digit sum until a single digit remains. Shows each step, the formula dr(n) = 1+((n−1) mod 9), and the additive persistence (number of steps). Works for very large numbers. Client-side.

Digital Root Calculator Features

  • Digital root
  • Step-by-step
  • Persistence
  • Formula
  • Large numbers

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