1 foot = 12 inches
1 meter = 100 centimeters
Basics
There are two common systems of measurement:
(1) US
(2) Metric
Within these two systems, some of the most common measurements are in the following tables.
| Distance – US | |||
| Inch (in) | Foot (ft) | Yard (yd) | Mile |
| 1 | 12 in | 3 ft | 5280 ft 1760 yd |
| Distance – Metric | |||
| Millimeter (mm) | Centimeter (cm) | Meter (m) | Kilometer (km) |
| 1 | 10 mm | 100 cm 1000 mm |
1000 m |
Distance |
| Area – US | |||
| Square Inch (in²) | Square Foot (ft²) | ||
| 1 | 1 ft² = 1 in² ÷ 12² = 1 ÷ 144 | ||
| Area – Metric | |||
| Square Centimeter (cm²) | Square Meter (m²) | ||
| 1 | 1 m² = 1 cm² ÷ 100² = 1 ÷ 10000 | ||
Area |
| Volume – US | |||
| Cubic Inch (in³) | Cubic Foot (ft³) | ||
| 1 | 1 ft³ = 1 in³ ÷ 12³ = 1 ÷ 1728 | ||
| Volume – Metric | |||
| Cubic Centimeter (cm³) | Cubic Meter (m³) | ||
| 1 | 1 m³ = 1 cm³ ÷ 100³ = 1 ÷ 1000000 |
||
Volume |
| Mass – US | ||
| Ounce (oz) | Pound (lb) | Ton |
| 1 | 16 oz | 2000 lb |
| Mass – Metric | ||
| Milligram (mg) | Gram (g) | Kilogram (kg) |
| 1 | 1000 mg | 1000 g |
Mass |
Question
How many feet are in 6 inches?
Answer
0.5 feet
Answer Process
Feet = Inches ÷ 12 inches per foot
Feet = 6 ÷ 12 = 0.5 feet
| Input | Display | Comment |
 |
blinker | clears screen |
| 6 ÷ 12 | 6÷12 | Feet = Inches ÷ 12 inches per foot |
 |
0.5 | Answer |
Measurement |
Question
How many meters are in 75 centimeters?
Answer
0.75 meters
Answer Process
Meters = Centimeters ÷ 100 centimeters per meter
Meters = 75 ÷ 100 = 0.75 meters
| Input | Display | Comment |
|
blinker | clears screen |
| 75 ÷ 100 | 75÷100 | Meters = Centimeters ÷ 100 centimeters per meter |
|
0.75 | Answer |
Measurement |
Question
How many square feet are in 288 square inches?
Answer
2 square feet
Answer Process
Square Feet = Square Inches ÷ 144 square inches per square foot
Square Feet = 288 ÷ 144 = 2 square feet
| Input | Display | Comment |
|
blinker | clears screen |
| 288 ÷ 144 | 288÷144 | Square Feet = Square Inches ÷ 144 square inches per square foot |
|
2 | Answer |
Measurement |
Question
How many square meters are in 3500 square centimeters?
Answer
0.35 square meters
Answer Process
Square Meters = Square Centimeters ÷ 10000 square centimeters per square meter
Square Meters = 3500 ÷ 10000 = 0.35 square meters
| Input | Display | Comment |
|
blinker | clears screen |
| 3500 ÷ 10000 | 3500÷10000 | Square Meters = Square Centimeters ÷ 10000 square centimeters per square meter |
|
0.35 | Answer |
Measurement |
Question
How many cubic feet are in 4320 cubic inches?
Answer
2.5 cubic feet
Answer Process
Cubic Feet = Cubic Inches ÷ 1728 cubic inches per cubic foot
Cubic Feet = 4320 ÷ 1728 = 2.5 cubic feet
| Input | Display | Comment |
|
blinker | clears screen |
| 4320 ÷ 1728 | 4320÷1728 | Cubic Feet = Cubic Inches ÷ 1728 cubic inches per cubic foot |
|
2.5 | Answer |
Measurement |
Question
How many cubic meters are in 450000 cubic centimeters?
Answer
0.45 cubic centimeters
Answer Process
Cubic Meters = Cubic Centimeters ÷ 1000000 cubic centimeters per cubic meter
Cubic Meters = 450000 ÷ 1000000 = 0.45 cubic meters
| Input | Display | Comment |
|
blinker | clears screen |
| 450000 ÷ 1000000 | 450000÷1000000 | Cubic Meters = Cubic Centimeters ÷ 1000000 cubic centimeters per cubic meter |
|
0.45 | Answer |
Measurement |
Question
How many pounds are in 4 ounces?
Answer
0.25 pounds
Answer Process
Pounds = Ounces ÷ 16 ounces per pound
Pounds = 4 ÷ 16 = 0.25 pounds
| Input | Display | Comment |
|
blinker | clears screen |
| 4 ÷ 16 | 4÷16 | Pounds = Ounces ÷ 16 ounces per pound |
|
0.25 | Answer |
Measurement |
Question
How many grams are in 675 milligrams?
Answer
0.675 grams
Answer Process
Grams = Milligrams ÷ 1000 milligrams per gram
Grams = 675 ÷ 1000 = 0.675 grams
| Input | Display | Comment |
|
blinker | clears screen |
| 675 ÷ 1000 | 675÷1000 | Grams = Milligrams ÷ 1000 milligrams per gram |
|
0.675 | Answer |
Measurement |
Practice – Questions
1. How many feet are in 9 inches?
2. How many meters are in 35 centimeters?
3. How many pounds are in 10 ounces?
4. How many grams are in 333 milligrams?
5. With reference to Question 4, round your answer to the nearest hundredth.
6. How many square feet are in 864 square inches?
7. How many square meters are in 570000 square centimeters?
8. How many cubic feet are in 12960 cubic inches?
9. How many cubic meters are in 8850000 cubic centimeters?
10. With reference to Question 9, round your answer to the nearest tenth.
Practice – Answers
1. 0.75
2. 0.35
3. 0.625
4. 0.333
5. 0.33
6. 6
7. 57
8. 7.5
9. 8.85
10. 8.9