Introduction Grading systems help evaluate student performance based on marks. In this post, we'll build a simple grade calculator using Tkinter in Python. The user enters marks, clicks a button, and the program displays the grade. Code: Grade Calculator using Tkinter from tkinter import * def calculate_grade(): marks = float(e1.get()) if marks >= 90: grade = "A" elif marks >= 80: grade = "B" elif marks >= 70: grade = "C" elif marks >= 60: grade = "D" else: grade = "F" l3.config(text=f"Grade: {grade}") b = Tk() b.title("Grade Calculator") b.geometry("300x200") l1 = Label(b, text="Enter Marks:") l1.pack() e1 = Entry(b) e1.pack() b1 = Button(b, text="Check Grade", command=calculate_grade) b1.pack() l3 = Label(b, text="Grade: ") l3.pack() b.mainloop() Explanation of Code Step 1: Import Tkinter We import Tkinter using from tkinter import *, which allows us to create GUI components. Step 2: Function to Calculate Grade calculate_grade() fetches the value from the entry field (e1.get()). It converts the value to float (since marks may have decimals). The if-elif conditions determine the grade based on marks: 90+ → A 80-89 → B 70-79 → C 60-69 → D Below 60 → F The grade is displayed using l3.config(text=f"Grade: {grade}"). Step 3: Creating the Tkinter Window b = Tk() initializes the main application window. b.title("Grade Calculator") sets the window title. b.geometry("300x200") sets the window size. Step 4: Adding Widgets Label (l1) – Displays "Enter Marks:". Entry (e1) – User types marks here. Button (b1) – Calls calculate_grade() when clicked. Result Label (l3) – Displays the grade after clicking the button. Step 5: Running the Application b.mainloop() keeps the GUI open and responsive. Conclusion This simple Tkinter project helps visualize how conditional statements work in Python. You can expand it by adding: ✅ GPA Calculator (average of multiple subjects). ✅ Color-coded Grades (Green for A, Red for F). ✅ Additional Features (Remarks like "Excellent", "Needs Improvement"). Try modifying it and share your version!

from tkinter import *

def calculate_grade():
    marks = float(e1.get())

    if marks >= 90:
        grade = "A"
    elif marks >= 80:
        grade = "B"
    elif marks >= 70:
        grade = "C"
    elif marks >= 60:
        grade = "D"
    else:
        grade = "F"

    l3.config(text=f"Grade: {grade}")

b = Tk()
b.title("Grade Calculator")
b.geometry("300x200")

l1 = Label(b, text="Enter Marks:")
l1.pack()

e1 = Entry(b)
e1.pack()

b1 = Button(b, text="Check Grade", command=calculate_grade)
b1.pack()

l3 = Label(b, text="Grade: ")
l3.pack()

b.mainloop()

Related Posts

Cafeto: My First Plugin on PyPI

Mar 17, 2025  0

Async APIs in Next.js 15: What’s the Hype All About?

Mar 5, 2025  0

Hoppscotch Self-Host: The Open-Source Postman Alternati...

Mar 18, 2025  0