Find the base for the logarithm: it is likely to be 10 if you are a newcomer to logs or e (= 2.71828...) if you are more advanced.
Then the antilog of x is 10x or ex.
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If it is log to the base 10, use the calculator to find 10 to that power. If it is log to the base e, use the calculator to find e to that power. Both the above are standard functions on all scientific calculators and are easy to work out on spreadsheets. Alternatively, you can find the antilog of the absolute value and then find the reciprocal. Thus antilog(-3.5) = 1/antilog(3.5) etc.
Take the logarithm of your number, divide it by 3 then take the antilog.
The antilog of -4.45 refers to the inverse operation of taking the logarithm base 10 of a number. To find the antilog of -4.45, you would raise 10 to the power of -4.45. This can be calculated as 10^(-4.45), which equals approximately 3.54813389234.
First you must decide what basis you are using for logarithms. Often this will be the number 10, or the number e. (In theory, any number greater than 1 will work.) Then you just raise the base to your number. For example, the antilog (base-10) of 5 is simply 105 = 100,000. Your scientific calculator should have an antilog key.
The antilogarithm (or antilog) of a number is found by raising 10 to that number if it's a common logarithm (base 10). Therefore, the antilog of 4.33206 is calculated as (10^{4.33206}), which equals approximately 21,436.49.