This document provides information about converting between Celsius and Fahrenheit temperature scales. It includes: - The definitions of the Celsius and Fahrenheit scales and their freezing/boiling points of water. - A formula to convert between the two scales. - Examples of conversions, including converting temperature ranges. - Discussion of the importance of being able to convert between the scales in daily life.

1. STOP, LOOK, &
OBSERVE!

5. CONVERSION OF DEGREES
CELSIUS TO FAHRENHEIT AND
VICE VERSA
Presented by:
Princess Jenny B. Derrada

6. At the end of the lesson, the students must be
able to:
a. convert Celcius measurement to Fahrenheit
measurement and vice versa;
b. appreciate the importance of converting
degrees Celsius to Fahrenheit and vice versa in
one’s life;
c. solve problems involving temperature.

7. Use the figure on the right to
complete the table below.
Temperature °𝑪 °𝑭
1. Boiling point of water
2. Normal body
temperature
3. A hot day
4. Room temperature
5. Freezing point of water
6. A very cold day
100 212
37 98.6
30 92
20 68
0 −32
−10 −20

8. 1.What are some things that are cold?
2.What are some things that are hot?
3.When do you know when something is hot or
cold?

9. Temperature is a measure of the hotness or coldness of
something. The two most commonly used temperature
scales are the Fahrenheit and the Celsius.
The Fahrenheit scale was invented in the early 1700s by
Gabriel D. Fahrenheit, a German physicist. Pure water
freezes at −𝟑𝟐°𝑭 and boils at 𝟐𝟏𝟐°𝑭 . The normal
temperature for human body is 𝟗𝟖. 𝟔°𝑭.
The Celsius scale was developed in 1742 by Anders Celsius,
a Swedish astronomer. Pure water freezes at 0°𝑪 and boils
at 𝟏𝟎𝟎°𝑪. The normal temperature for human body is 𝟑𝟕°𝑪.

10. FORMULA
𝑪 =
𝟓
𝟗
𝑭 − 𝟑𝟐
𝑭 =
𝟗
𝟓
𝑪 + 𝟑𝟐
C – temperature in °𝑪
F – temperature in °𝑭

11. Example 1: Convert each to the indicated unit.
a. 𝟖𝟎℃ 𝒕𝒐 ℉ b. 𝟗𝟖. 𝟔℉ 𝐭𝐨 ℃
𝑭 =
𝟗
𝟓
𝑪 + 𝟑𝟐
𝑭 =
𝟗
𝟓
𝟖𝟎 + 𝟑𝟐
𝑭 = 𝟏𝟒𝟒 + 𝟑𝟐
𝑭 = 𝟏𝟕𝟔
𝑪 =
𝟓
𝟗
𝑭 − 𝟑𝟐
𝑪 =
𝟓
𝟗
𝟗𝟖. 𝟔 − 𝟑𝟐
𝑪 =
𝟓
𝟗
𝟔𝟔. 𝟔
𝑪 = 𝟑𝟕
Thus, 𝟖𝟎℃ = 𝟏𝟕𝟔℉. Thus, 𝟗𝟖. 𝟔℉ = 𝟑𝟕℃.

12. Try it!
a. 𝟐𝟎℃ 𝒕𝒐 ℉
b. 𝟏𝟎𝟓℉ 𝐭𝐨 ℃

13. Example 2:
The surface temperature of mercury
ranges from −𝟏𝟕𝟑℃ 𝒕𝒐 𝟒𝟐𝟕℃. Find its
equivalent temperature in the
Fahrenheit scale.

14. Use the Celsius to Fahrenheit formula: 𝑭 =
𝟗
𝟓
𝑪 + 𝟑𝟐
Solution:
For 427℃
𝑭 =
𝟗
𝟓
𝟒𝟐𝟕 + 𝟑𝟐
𝑭 = 𝟕𝟔𝟖. 𝟔 + 𝟑𝟐
𝑭 = 𝟖𝟎𝟎. 𝟔
Thus, the surface temperature of mercury ranges
from −𝟐𝟕𝟗. 𝟒℉ 𝒕𝒐 𝟖𝟎𝟎. 𝟔℉.
For −173℃
𝑭 =
𝟗
𝟓
−𝟏𝟕𝟑 + 𝟑𝟐
𝑭 = −𝟑𝟏𝟏. 𝟒 + 𝟑𝟐
𝑭 = −𝟐𝟕𝟗. 𝟒

15. What do think the importance of
converting degrees Celsius to Fahrenheit
and vice versa into your life as an
individual?

16. 1. 𝟏𝟎℃
2. −𝟑𝟓℃
3. 𝟗𝟓℉
4. 𝟏𝟎𝟒℉
5. The surface temperature of Jupiter is −𝟏𝟐℃.
Find its equivalent temperature in the
Fahrenheit scale.
Direction: Bring out 1 whole sheet of paper.
Solve the following.

17. 1. 𝟐𝟓℃
2. 𝟒𝟎℃
3. −𝟕𝟔℉
4. −𝟒℉
5. The surface temperature of Mars is
− 𝟖𝟓℃ 𝒕𝒐 − 𝟑𝟎℃. Find its equivalent
temperature in the Fahrenheit scale.
ASSIGNMENT

18. THANK YOU!