https://calcmodern.com/calculators/logarithm/
Logarithm Calculator | CalcModern
Calculate logarithms with any base, including ln (natural log) and log base 10.
logarithm calculator
https://www.easyunitconverter.com/log-base-2-calculator
Log Base 2 Calculator | Binary Logarithm (lb)
Calculate log base 2 (binary logarithm) of any number. Used in computer science, information theory, and binary systems. Free logâ‚‚ calculator with formula.
binary logarithmbasecalculator