Home › Calculators › Logarithm calculator

Online logarithm calculator: any base, natural and decimal

Below are logarithm calculators:


When calculating, you can set the base of the logarithm, or use logarithms with fixed bases (natural and decimal).

Enter data according to the formulas and properties of logarithms.

Logarithm calculator with a given base

Enter the base of the logarithm, the number, and click .

log

Natural logarithm calculator

Enter the number and click .

Remember that the base of a natural logarithm is e ≈ 2.72

ln

Decimal logarithm calculator

Enter the number and click .

Remember that the base of a decimal logarithm is 10

lg