Digital Root Calculator
Calculate digital root of any number
Formula
DR(n) = 1 + ((n-1) mod 9)
Repeatedly sum digits until single digit; equivalent to n mod 9 (adjusted).
Examples
9875
DR = 2 (9+8+7+5=29→2+9=11→1+1=2).
Frequently Asked Questions
About Digital Root
Calculate the digital root by repeatedly summing digits.
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