How to Convert 21 oz to lbs
Step 1: Identify the conversion factor
The conversion factor from oz to lbs is:
1 oz = 0.062500 lbs
Step 2: Set up the calculation
To convert 21 oz to lbs, multiply by the conversion factor:
21 × 0.062500
Step 3: Calculate
21 × 0.062500 = 1.3125
Step 4: Round the result
The result is approximately: 1.3125 lbs
Final Answer:
21 oz is approximately 1.3125 lbs
About Ounce (oz)
Definition: An ounce (symbol: oz) is a unit of mass in the imperial and US customary systems. One ounce is equal to 1/16 of a pound or approximately 28.3495 grams.
History: The ounce originated from the Roman uncia, which was 1/12 of a Roman pound. Over time, different regions had various definitions of the ounce, but the avoirdupois ounce became widely used in the 14th century. The modern definition was established in 1959.
Current use: Primarily used in the United States for measuring packaged foods, cooking ingredients, and postal items.
About Pound (lbs)
Definition: A pound (symbol: lb) is a unit of mass used in the imperial and US customary systems of measurement. One pound is exactly 0.4535 kilograms.
History: The pound originates from the Roman unit “libra,” which is where the abbreviation “lb” comes from. Various definitions of the pound existed throughout history, but in 1959, the international avoirdupois pound was standardized as exactly 0.4535 kilograms. The avoirdupois system, widely used since the 13th century, divides the pound into 16 ounces, making it convenient for trade and commerce.
Current use: Widely used in the United States and the United Kingdom for everyday measurements, particularly body weight, and in food labeling.
Oz to Lbs Conversion Table
| Oz | Lbs |
|---|---|
| 2.1 | 0.1313 |
| 10.5 | 0.6562 |
| 21 | 1.3125 |
| 42 | 2.6250 |
| 105 | 6.5625 |
| 210 | 13.1250 |
| 420 | 26.2500 |