BMI Calculator

Here's how to create a GUI that calculates the Body Mass Index

Code:

import tkinter as tk

root = tk.Tk ()

root.geometry ( " 700x500 " )

root.configure ( bg = " light blue " )

label1 = tk.Label ( root,text = " BMI INDEX CALCULATOR " , font = ( " Times new roman " , 50 ) , bg = " black " , fg = " white " )

label1.pack()

label2 = tk.Label ( root,text = " Name : " , font = ( " Times new roman " , 15 ) )

label2.place ( x = 0 , y = 200 )

entry1 = tk.Entry ( root )

entry1.place ( x = 100 , y = 205 )

label3 = tk.Label ( root,text = " Height : " , font = ( " Times new roman " , 15 ) )

label3.place ( x = 0 , y = 250 )

entry2 = tk.Entry ( root )

entry2.place ( x = 100 , y = 255 )

label4 = tk.Label ( root,text = " Weight : " , font = ( " Times new roman " , 15 ) )

label4.place ( x = 0 , y = 300 )

entry3 = tk.Entry ( root )

entry3.place ( x = 100 , y = 305 )

def sub():

    value1 = entry1.get()

    value2 = float(entry2.get())

    value3 = float(entry3.get())

    bmi = value3 / (value2*value2 )

    bmi2 = round ( bmi , 5 )

    label5=tk.Label ( root,text = f"Hi {value1}. Your BMI is : {bmi2}" , font = ( " Times new roman" , 15 ) )

    label5.place ( x = 0 , y = 450 )

button1 = tk.Button ( root , text = " Submit " , command = sub )

button1.configure ( bg = " blue " ) #can disable button : button1.configure ( bg = " blue " , state = "disable" )

button1.place ( x = 100 , y = 350 )

root.mainloop()

Output: