Logarithm Calculator

Online logarithm calculator / log calculator of base 2/e/10, and inverse logarithm calculator.

• Logarithm calculator
• Inverse logarithm calculator

Logarithm calculator

Calculate the logarithm of a number x to the base b.

log_b x = y

 

In order to calculate log_b(x) on the calculator:

1. Enter the base b.
2. Enter the number x.
3. Press the  =  button:

	log
		2e10

Inverse logarithm calculator

When

y = log_b x

The inverse logarithm (or anti logarithm) is calculated by raising the base b to the logarithm y:

x = log^-1(y) = b ^y

 

In order to calculate log^-1(y) on the calculator:

1. Enter the base b (10 is the default value).
2. Enter the logarithm value y.
3. Press the  =  button:

 

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See also

• Natural logarithm calculator
• Exponents calculator
• Logarithm - log(x)
• Natural logarithm - ln(x)
• Logarithm of zero
• Logarithm of infinity
• Logarithm of negative number