Python programs for conversion between kilograms and grams have been given below. These are the units to calculate mass of an object. To convert kilograms into grams, multiply the number of kilograms by 1000 and to convert grams into kilograms, divide the number of grams by 1000.

Example:

Convert kilograms to grams:

(i) 1 kilogram = (1 x 1000) grams = 1000 grams

(ii) 1.5 kilograms = (1.5 x 1000) grams = 1500 grams

(iii) 4.350 kilograms = (4.350 x 1000) grams = 4350 grams

Convert gram to kilogram:

(i)1 gram = (1 / 1000) kilograms = 0.001 kilograms

(ii)700 grams = (700 / 1000) kilograms = 0.700 kilograms

(iii)2250 grams = (2250 / 1000) kilograms = 2.250 kilograms

The following section covers the Python programs to solve the above problems are along with the algorithm, pseudocode and time-complexity of the programs.

## 1.1. Algorithm to convert Kilograms to Grams

1. Take value in kilograms k as input.

2. Perform g = k * 1000 to convert kilograms to grams

3. Display value of g as the output.

## 1.2. Algorithm to convert grams to Kilograms

1. Take value in grams g as input.

2. Perform k = g / 1000 to convert grams to kilograms

3. Display value of k as the output.

## 2.1. Pseudocode to convert Kilograms to Grams

Input : Value in Kilograms $k$

Output : $k$ in grams

1. Procedure kilogramToGram($k$):

2. $g \leftarrow k \times 1000$

3. Return $g$

4. End Procedure

## 2.2. Pseudocode to convert grams to Kilograms

Input : Value in Grams $g$

Output : $g$ in Kilograms

1. Procedure gramToKilogram($g$):

2. $k \leftarrow \frac{g}{1000}$

3. Return $k$

4. End Procedure

## 3. Time complexity for Conversion between Kilograms and Grams

Time Complexity: O(1)

## 4.1. Python program to convert Kilograms to Grams

Code has been copied
###############################################
#           alphabetacoder.com
# Python program to convert Kilograms to Grams
###############################################

# take input
k = float(input("Enter values in kilograms: "))

# convert kilograms to grams
g = k * 1000

# display result
print(k, "kilograms =", g, "grams")


Output

Enter values in kilograms: 4.255

4.255 kilograms = 4255.0 grams

## 4.2. Python program to convert Grams to Kilograms

Code has been copied
###############################################
#           alphabetacoder.com
# Python program to convert Grams to Kilograms
###############################################

# take input
g = float(input("Enter values in grams: "))

# convert grams to kilograms
k = g / 1000

# display result
print(g, "grams =", k, "kilograms")


Output

Enter values in grams: 5775

5775.0 grams = 5.775 kilograms