Natural Logarithm Calculator Natural logarithm calculator. ln(x) calculator. The natural logarithm of x is: ln x = loge x = y Enter the input number x and press the = button: ln See also Logarithm calculator Exponents calculator Antilogarithm calculator Natural logarithm - ln(x) Logarithm - log(x) e constant Natural logarithm of zero Natural logarithm of infinity Natural logarithm of negative number Write how to improve this page URL Name E-mail