Here is the answer to questions like: ln( 30 )? or How to find the natural log of 30?

Use our base e log calculator to find the natural logarithm of any positive real number.

What is natural logarithm?

The natural log is the logarithm to the base of the number e and is the inverse function of an exponential function. Natural logarithm is particular case of logarithms and is typically used in solving time, growth/decay problems.

The number 'e' is an irrational constant approximately equal to 2.718281828459. The natural logarithm of x is generally written as ln(x) or logex.

The natural logarithm of x is the power to which e would have to be raised to equal x. For example, ln(10) is 2.30258509..., because e2.30258509... = 10.

Natural Logarithm Basic Rules

The natural logarithm table (<= 1.0)

The natural logarithm table (>= 1.0)

Natural (ln) Log Calculator

Please link to this page! Just right click on the above image, choose copy link address, then past it in your HTML.

Sample Natural Logarithms Calculations

• Natural Log - ln(5.4)
• Natural Log - ln(13850)
• Natural Log - ln(49)

• Natural Log - ln(13)
• Natural Log - ln(19400)
• Natural Log - ln(74.5)

• Natural Log - ln(4950)
• Natural Log - ln(6.6)
• Natural Log - ln(18250)

ncG1vNJzZmibn6S5pLvNr5yrq5mku2%2BvzqZmppmknXyvrdOuqZqkXaG8qHvLp1xrcI9ofaBxkXJca21jew%3D%3D