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Asked: 2026-05-26T10:43:39+00:00

So I’m trying to calculate my bmi using the following method. double bmi =

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So I’m trying to calculate my bmi using the following method. 

double bmi = weight / ((height * 100) * (height * 100));
bmi = Math.round(bmi * 100.0) / 100.0;

From the first line I get an answer that looks like this:

2.3457310760477412E-7

which is why I want to round this to one or two decimals. But this results in bmi being 0.0 instead.

I have also tried decimalformat which also returns 0. What am I doing wrong?

EDIT – SOLUTION

The problem was my formula! Centimeter should be divided by 10 not multiplied!
Thanks!

//André

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1 Answer

  1. Editorial Team

    The number you are getting from your first line, 2.3457310760477412E-7 is already kinda small. It is roughly equal to 2.345/10000000 or 0.00000023457. And this is very close to zero. Math works as expected, rounding the number to the closest integer – 0.

    The error is either in the input variables or in the fomula you are using. Maybe you have your height given in centimeters instead of meters?

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