1. take a number from the death note, it can be manga, anime, or the movie as longs as it shows the exact number.

2. Take the number then divided by 3556 which is the number of to live for a day for a human

3. then divide it by 365 to find out the number of years

Then your done!

You can try this on light or other characters

If you want to know the exact number of years left

2. Take the number then divided by 3556 which is the number of to live for a day for a human

3. then divide it by 365 to find out the number of years

Then your done!

You can try this on light or other characters

If you want to know the exact number of years left