eGFR Calculations w/Body Mass?

I'll clarify I am not looking for medical advice but trying to understand the online calculator here: https://www.kidney.org/professionals/gfr_calculator

So using creatinine (mine was 1.47) it shows 62 (Which is what lab shows)

However if I enter my height/weight it shows 77.

What is the correct one? FWIW I am overweight (5'10" and 218 lbs) and i've heard this can cause your creatinine to be "high"?

Again i'm not seeking medical advice but asking which value is more accurate or should be used?