Build A BMI Fitness Calculator – Tkinter Projects 1

In this video we’ll build a Body Mass Index Calculator with Tkinter and Python.

Follow along as I build a modern looking BMI Calculator using the customTkinter library, and some basic python.

We’ll do a little math to calculate BMI, and we’ll use some basic Python logic to give the results in a user friendly way.

Install CustomTkinter: https://bit.ly/3pCweUe

Python Code: bmi.py
(Github Code)

from tkinter import *
import customtkinter
from PIL import Image, ImageTk


customtkinter.set_appearance_mode("dark")
customtkinter.set_default_color_theme("dark-blue")

root = customtkinter.CTk()

root.title('Tkinter.com - BMI Calculator')
root.iconbitmap('c:/tkinter.com/codemy.ico')
root.geometry("500x650")

# Define Our Image
meter = ImageTk.PhotoImage(Image.open("images/meter2.png"))
meter_img = Label(root, image=meter, bd=0)
meter_img.pack(pady=20)


def clear_screen():
	h_entry.delete(0, END)
	w_entry.delete(0, END)
	results.config(text="")

def get_bmi():
	# calculate BMI
	# (weight_pounds/height_inches^2) * 703
	our_height = int(h_entry.get()) * int(h_entry.get())
	our_weight = int(w_entry.get())
	bmi = (our_weight/our_height)*703
	bmi_rounded = round(bmi, 1)

	results.config(text=f"{str(bmi_rounded)}")

	# Logic
	if bmi_rounded < 18.5:
		results.config(text=f"{str(bmi_rounded)}\nUnderweight", text_color="#54b1e1")
	elif bmi_rounded >= 18.5 and bmi_rounded <= 24.9:
		results.config(text=f"{str(bmi_rounded)}\nNormal", text_color="#b3d686")
	
	elif bmi_rounded >= 25.0 and bmi_rounded <= 29.9:
		results.config(text=f"{str(bmi_rounded)}\nOverweight", text_color="#fed429")

	elif bmi_rounded >= 30.0 and bmi_rounded <= 34.9:
		results.config(text=f"{str(bmi_rounded)}\nObese", text_color="#fbaf42")

	elif bmi_rounded >= 35:
		results.config(text=f"{str(bmi_rounded)}\nExtreme Obese", text_color="#f25356")		


# Define Entry Boxes
h_entry = customtkinter.CTkEntry(master=root, 
	placeholder_text="Height In Inches",
	width=200,
	height=30,
	border_width=1,
	corner_radius=10)
h_entry.pack(pady=20)

w_entry = customtkinter.CTkEntry(master=root, 
	placeholder_text="Weight in Pounds",
	width=200,
	height=30,
	border_width=1,
	corner_radius=10)
w_entry.pack(pady=20)

# Buttons
button_1 = customtkinter.CTkButton(master=root,
	text="Calculate BMI",
	width=190,
	height=40,
	compound="top",
	command=get_bmi)
button_1.pack(pady=20)	

button_2 = customtkinter.CTkButton(master=root,
	text="Clear Screen",
	width=190,
	height=40,
	fg_color="#D35B58",
	hover_color="#C77C78",
	command=clear_screen)
button_2.pack(pady=20)

# result
results = customtkinter.CTkLabel(master=root, text="",
	text_font=("Helvetica", 28))
results.pack(pady=50)

root.mainloop()