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PyQt5 – Age Nearest Birthday Calculator

Last Updated : 23 May, 2022
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In this article we will see how we can create a age nearest birthday calculator. Age nearest calculator is the calculator which is used to get the age nearest to the birth date. Below is how the age nearest calculator looks like Concept : We can get the age nearest birthday by getting the difference between the birth date and the present date with the help of python datetime objects will keep count of leap years and we can get the number of days between the dates. Then these days can be divided with the 365.32422 to get the years, then the round value of years will be the age nearest birthday

GUI Implementation Steps : 1. Create a heading label that display the calculator name 2. Create label to show user to select the birth date 3. Create a QCalendarWidget object for user to select the birth date 4. Create a push button to calculate the nearest age 5. Create a label to show the calculated age Back-End Implementation : 1. Make the calendar future date block i.e set current date as maximum date 2. Add action to the push button 3. Inside the push button action get the date from the calendar and the present date 4. Get the day, month and year from both the dates 5. Create a object for both the dates 6. Get the difference from both the dates and get the days 7. Divide the days with 365.2422(due to leap year) to get total years 8. Get the round value of the years and show this value through label

Below is the implementation 


# importing libraries
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import datetime
import sys
class Window(QMainWindow):
    def __init__(self):
        # setting title
        self.setWindowTitle("Python ")
        # width of window
        self.w_width = 400
        # height of window
        self.w_height = 500
        # setting geometry
        self.setGeometry(100, 100, self.w_width, self.w_height)
        # calling method
        # showing all the widgets
    # method for components
    def UiComponents(self):
        # creating head label
        head = QLabel("Age Nearest Birthday Calculator", self)
        # setting geometry to the head
        head.setGeometry(0, 10, 400, 60)
        # font
        font = QFont('Times', 15)
        # setting font to the head
        # setting alignment of the head
        # setting color effect to the head
        color = QGraphicsColorizeEffect(self)
        # creating a label
        b_label = QLabel("Select Birthday", self)
        # setting properties  label
        b_label.setGeometry(50, 105, 300, 25)
                              "border : 1px solid black;"
                              "background : rgba(70, 70, 70, 25);"
        b_label.setFont(QFont('Times', 9))
        # creating a calendar widget to select the date
        self.calendar = QCalendarWidget(self)
        # setting geometry of the calendar
        self.calendar.setGeometry(50, 130, 300, 180)
        # setting font to the calendar
        self.calendar.setFont(QFont('Times', 6))
        # getting current date
        date = QDate.currentDate()
        # blocking future dates
        # creating a push button
        calculate = QPushButton("Calculate Time", self)
        # setting geometry to the push button
        calculate.setGeometry(125, 340, 150, 40)
        # adding action to the calculate button
        # creating a label to show percentile
        self.result = QLabel(self)
        # setting properties to result label
        self.result.setGeometry(50, 400, 300, 60)
                                  "border : 3px solid black;"
                                  "background : white;"
        self.result.setFont(QFont('Arial', 11))
    def calculate_action(self):
        # getting birth date day
        birth = self.calendar.selectedDate()
        # getting year and month day of birth day
        birth_year = birth.year()
        birth_month = birth.month()
        birth_day =
        # getting today date
        current = QDate.currentDate()
        # getting year and month day of current day
        current_year = current.year()
        current_month = current.month()
        current_day =
        # converting  dates into date object
        birth_date =, birth_month, birth_day)
        current_date =, current_month, current_day)
        # getting difference in both the dates
        difference = current_date - birth_date
        # getting days from the difference
        difference = difference.days
        # getting years from the difference
        years = difference / 365.2422
        # getting round value of years
        years = round(years)
        # setting this value with the help of label
        self.result.setText("Closest Age is : " + str(years))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app

Output :

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