Digit count calculator

How many digits?

The number of digits in a positive integer n is floor(log₁₀(n)) + 1. For example, 1234567890 has 10 digits. A number with d digits ranges from 10^(d−1) to 10^d − 1.

Quick reference

1 digit: 1–9. 2 digits: 10–99. 3 digits: 100–999. 6 digits: 100,000–999,999. 10 digits: 1,000,000,000–9,999,999,999.