Converting byte array into float

Question

I have a byte array: [93, 156, 244, 63]

I want to convert it to a floating point number, it should be ~9.8.
How exactly would I go about doing this in JS? I am rusty when it comes to bitwise operations.

Thanks in advance.

edit: The array should be [92,209,28,65]

Can you elaborate more on the process and show your own attempts ata solution? — Chris
– Chris, Commented May 19, 2017 at 0:39
Chris, listen to Chris's comment :) - I assume you want to know how to interpret an array of four bytes (little-endian) as a single 32-bit IEEE float? — le_m
– le_m, Commented May 19, 2017 at 0:43
9.8 would correspond to [ 205, 204, 28, 65 ] (bytes of a 32-bit float) — le_m
– le_m, Commented May 19, 2017 at 0:49

zerkms · Accepted Answer · 2017-05-19 00:47:10Z

7

If it is a IEEE754 single precision floating number you might do:

new Float32Array(new Uint8Array([93, 156, 244, 63]).buffer)[0]

But it returns 1.9110218286514282 for the bytes you provided.

And you may see that 1.911... matches those bytes: http://www.binaryconvert.com/result_float.html?decimal=049046057049049048050049056050056054053049052050056050

answered May 19, 2017 at 0:47

zerkms

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