Pounds and Ounces Calculator

What Is a Pounds and Ounces Calculator?

A pounds and ounces calculator converts between imperial weight units and metric units. Enter pounds and ounces together, optionally add grams directly, and get totals in pounds, ounces, grams, and kilograms. You can also add or subtract a second weight, which is useful for shipping, cooking, fitness, and baby weight tracking.

How Pounds and Ounces Relate

The US customary and imperial systems use a fixed relationship between pounds and ounces:

$$ 1 \text{ lb} = 16 \text{ oz} $$

To convert a mixed weight to total ounces:

$$ \text{Total oz} = (\text{lb} \times 16) + \text{oz} $$

To convert to grams and kilograms:

$$ \text{Grams} = \text{Total lb} \times 453.59237 $$

$$ \text{Kilograms} = \frac{\text{Grams}}{1000} $$

For example, 2 lb 5 oz equals 37 ounces total, or about 1.049 kg. A newborn weighing 7 lb 8 oz is 120 ounces, or roughly 3.402 kg.

Related tools: Ounces to Pounds Converter and Pounds to Grams Converter.