# Ounces to pounds converter

> Convert ounces to pounds (oz to lbs) with the exact factor, a conversion chart and worked steps.

Interactive version: https://www.calcopenly.com/conversion/ounces-to-pounds
Subject: Unit converters

An ounce reading from a scale measures mass. It is suitable for an ingredient or parcel measured by weight, but a fluid-ounce mark on a bottle measures volume. You cannot exchange those two quantities without information about the substance's density.

One ounce is exactly 0.0625 pounds, so 16 oz is 1 lb. To convert oz to lbs, multiply by 0.0625; to convert back, multiply by 16.

The avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 g. Because both units are defined exactly, the factor above is exact and the results here carry no conversion error.

## Inputs

- **Ounces (oz)**

## Results

- Pounds (lb) — main result
- Conversion
- 1 lb in ounces (oz)

## Formula

$$
\text{pounds} = \text{ounces} \times 0.0625
$$

## Worked examples

### 16 oz to lb

- Ounces (oz): 16 oz
- **Pounds: 1 lb**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 8 oz to lb

- Ounces (oz): 8 oz
- **Pounds: 0.5 lb**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 48 oz to lb

- Ounces (oz): 48 oz
- **Pounds: 3 lb**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

## Questions

### When would I convert oz to lbs?

An ounce reading from a scale measures mass. It is suitable for an ingredient or parcel measured by weight, but a fluid-ounce mark on a bottle measures volume. You cannot exchange those two quantities without information about the substance's density.

### How many pounds are in a ounce?

One ounce is exactly 0.0625 pounds. The avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 g.

### How do you convert oz to lbs?

Multiply the number of ounces by 0.0625. For example, 16 oz × 0.0625 = 1 lb. To go the other way, divide by 0.0625.

### How can I estimate oz to lbs without a calculator?

Multiply by 0.062. That is 0.8% low of the exact factor 0.0625, so 16 oz comes out as 0.992 lb instead of 1.

### How accurate is the ounces to pounds converter?

Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 3 worked examples whose answers come from independent sources; for example, “16 oz to lb” is checked against Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions).

### Where does the method come from?

NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B; NIST Handbook 44, Appendix C: General tables of units of measurement; BIPM, The International System of Units (SI Brochure), 9th edition.

## Sources

- [NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44, Appendix C: General tables of units of measurement](https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/handbook-44)
- [BIPM, The International System of Units (SI Brochure), 9th edition](https://www.bipm.org/en/publications/si-brochure)