Python Project: Build an Age Calculator

Level: Beginner

Apr 21, 2025

Project Overview 💡

In this project, you'll create a simple Python program that calculates a person's age based on their birth year and the current year. This project is a great exercise for working with user input, integers, and basic arithmetic.

Challenge Yourself! 🚀

Before checking the solution, try creating a script that asks for someone's birth year and the current year and then displays their age.

Task:

Write a Python program that:

Asks the user to enter their birth year
Asks for the current year
Calculates the user's age
Prints the result

Expected Output: The program prompts the user to enter their year of birth and the current year and then it returns a message with the user's age.

Give it a shot! Scroll down when you're ready for the step-by-step guide.

Spoiler Alert!

Step-by-Step Guide

Step 1️⃣: Get the Birth Year

Prompt the user to input their birth year. Convert the input to an integer.

birth_year = int(input("Enter your birth year: "))

Step 2️⃣: Get the Current Year

Ask the user for the current year and convert it to an integer as well.

current_year = int(input("Enter the current year: "))

Step 3️⃣: Calculate the Age

Subtract the birth year from the current year to get the age.

age = current_year - birth_year

Step 4️⃣: Print the Age

Display the calculated age using an f-string.

print(f"You are {age} years old.")

Complete Code 🧨

# Age Calculator

# Step 1: Ask the user to enter their birth year
birth_year = int(input("Enter your birth year: "))

# Step 2: Ask the user to enter the current year
current_year = int(input("Enter the current year: "))

# Step 3: Calculate the user's age
age = current_year - birth_year

# Step 4: Display the user's age
print(f"You are {age} years old.")

Alternative Solution

Here’s a version that uses Python’s built-in datetime module to automatically get the current year:

from datetime import datetime

birth_year = int(input("Enter your birth year: "))
current_year = datetime.now().year
age = current_year - birth_year

print(f"You are {age} years old.")

Comparison

The original version asks the user for both birth year and current year.
The alternative version automatically detects the current year, making it more user-friendly and less error-prone.

Want More? 🔥

Enjoyed this project? Unlock real-world projects with full guides & solutions by subscribing to the paid plan. 🎉