Pounds and Ounces Calculator
Our free volume & weight converter handles poundsand ounces conversions. See tables, ratios, and examples for quick reference.
Formula
Total Ounces = (Pounds x 16) + Ounces
There are 16 ounces per pound. Multiply pounds by 16 and add remaining ounces for total ounces. Multiply total ounces by 28.3495 for grams. Divide total pounds by 14 for stones.
Worked Examples
Example 1: Baby Weight Conversion
Problem: A baby weighs 7 lb 11 oz. Convert to grams and kilograms.
Solution: Total ounces = (7 x 16) + 11 = 123 oz\nGrams = 123 x 28.3495 = 3,486.99 g\nKilograms = 3,486.99 / 1000 = 3.487 kg
Result: 7 lb 11 oz = 3,486.99 g = 3.487 kg
Example 2: Package Weight Addition
Problem: Two packages weigh 2 lb 14 oz and 1 lb 10 oz. What is the total?
Solution: Ounces: 14 + 10 = 24 oz = 1 lb 8 oz\nPounds: 2 + 1 + 1 = 4 lb\nTotal: 4 lb 8 oz = 72 oz\nGrams: 72 x 28.3495 = 2,041.16 g
Result: Total = 4 lb 8 oz (2,041.16 g)
Frequently Asked Questions
How many ounces are in a pound?
There are exactly 16 ounces in 1 pound (avoirdupois). This is the standard used for measuring food, people, packages, and most everyday items. To convert pounds to ounces, multiply by 16. To convert ounces to pounds, divide by 16. For example, 5 pounds equals 80 ounces, and 24 ounces equals 1.5 pounds. This relationship has been standard in the imperial and US customary systems for centuries.
How do I convert pounds and ounces to grams?
First convert everything to ounces by multiplying pounds by 16 and adding any remaining ounces. Then multiply the total ounces by 28.3495 to get grams. For example, 3 lb 4 oz equals 52 ounces total (3 x 16 + 4), and 52 x 28.3495 = 1,474.17 grams. Alternatively, you can convert pounds to grams directly by multiplying by 453.592, then add ounces multiplied by 28.3495.
How do I add weights in pounds and ounces?
Add the ounces together first, then add the pounds. If the ounces total 16 or more, convert the excess to pounds. For example, 3 lb 12 oz plus 2 lb 9 oz: first add ounces (12 + 9 = 21 oz), then convert 21 oz to 1 lb 5 oz, then add pounds (3 + 2 + 1 = 6 lb). The result is 6 lb 5 oz. Pounds and Ounces Calculator handles the carrying automatically so you do not need to do the mental math yourself.
What is the relationship between pounds, stones, and kilograms?
One stone equals 14 pounds, and one kilogram equals approximately 2.2046 pounds. Stones are commonly used in the UK and Ireland for body weight. To convert pounds to stones, divide by 14. For example, 168 pounds equals 12 stones exactly. To convert to kilograms, multiply pounds by 0.453592. The same 168 pounds equals about 76.2 kilograms. Hospital and medical settings worldwide increasingly use kilograms for weight measurements.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
Can I share or bookmark my calculation?
You can bookmark the calculator page in your browser. Many calculators also display a shareable result summary you can copy. The page URL stays the same so returning to it will bring you back to the same tool.