Python | Arithmetic operations in excel file using openpyxl

Last Updated : 11 Jul, 2025

Prerequisite: Reading & Writing to excel sheet using openpyxl
Openpyxl is a Python library using which one can perform multiple operations on excel files like reading, writing, arithmetic operations and plotting graphs. Let's see how to perform different arithmetic operations using openpyxl.

=SUM(cell1:cell2) : Adds all the numbers in a range of cells.

Python3

# import openpyxl module
import openpyxl

# Call a Workbook() function of openpyxl 
# to create a new blank Workbook object
wb = openpyxl.Workbook()

# Get workbook active sheet  
# from the active attribute.
sheet = wb.active

# writing to the cell of an excel sheet
sheet['A1'] = 200
sheet['A2'] = 300
sheet['A3'] = 400
sheet['A4'] = 500
sheet['A5'] = 600

# The value in cell A7 is set to a formula 
# that sums the values in A1, A2, A3, A4, A5 .
sheet['A7'] = '= SUM(A1:A5)'

# save the file
wb.save("sum.xlsx")

Output:

=PRODUCT(cell1:cell2) : Multiplies all the numbers in the range of cells.

Python3

import openpyxl

wb = openpyxl.Workbook()
sheet = wb.active

sheet['A1'] = 2
sheet['A2'] = 3
sheet['A3'] = 4
sheet['A4'] = 5
sheet['A5'] = 6

# The value in cell A7 is set to a formula 
# that multiplies the values in A1, A2, A3, A4, A5 .
sheet['A7'] = '= PRODUCT(A1:A5)'

wb.save("product.xlsx")

Output:

=AVERAGE(cell1:cell2) : It gives the average (arithmetical mean) of all the numbers which is present in the given cell range.

Python3

import openpyxl

wb = openpyxl.Workbook()
sheet = wb.active

sheet['A1'] = 200
sheet['A2'] = 300
sheet['A3'] = 400
sheet['A4'] = 500
sheet['A5'] = 600

# The value in cell A7 is set to a formula 
# that return average of the values in A1, A2, A3, A4, A5 .
sheet['A7'] = '= AVERAGE(A1:A5)'

wb.save("average.xlsx")

Output:

=QUOTIENT(num1, num2) : It returns the integer portion of a division.

Python3

import openpyxl

wb = openpyxl.Workbook()
sheet = wb.active

# The value in cell is set to a formula 
# that gives quotient value .
sheet['A1'] = '= QUOTIENT(64, 8)'
sheet['A2'] = '= QUOTIENT(25, 4)'

wb.save("quotient.xlsx")

Output:

=MOD(num1, num2) : Returns the remainder after a number is divided by the divisor.

Python3

import openpyxl

wb = openpyxl.Workbook()
sheet = wb.active

# The value in cell is set to a formula 
# that gives remainder or modulus value.
sheet['A1'] = '= MOD(64, 8)'
sheet['A2'] = '= MOD(25, 4)'

wb.save("modulus.xlsx")

Output:

=COUNT(cell1:cell2) : It counts the number of cells in a range that contain the number.

Python3

import openpyxl

wb = openpyxl.Workbook()
sheet = wb.active

sheet['A1'] = 200
sheet['A2'] = 300
sheet['A3'] = 400
sheet['A4'] = 500
sheet['A5'] = 600

# The value in cell A7 is set to a formula 
# that gives counting of number present in the cells.
sheet['A7'] = '= COUNT(A1:A6)'

wb.save("count.xlsx")