# How do I convert oz to lbs?

Converts ounces (oz) to pounds (lb) and back, with the exact unit definitions.

- Page: https://www.acalculator.org/convert/oz-to-lbs
- JSON spec: https://www.acalculator.org/convert/oz-to-lbs.json
- Version: e5a105153737

## Default answer

Example with the default inputs (Ounces (oz) 1): 1 oz = 0.0625 lb.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| value | Ounces (oz) | The amount in ounces to convert. |
| result | Pounds (lb) | The same amount in pounds. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| value | Ounces (oz) | The amount in ounces to convert. |
| result | Pounds (lb) | The amount in pounds. |

## Method

lb = oz × 0.0625 (the same as oz ÷ 16)

## Assumptions

- 1 ounce = 0.0625 pounds, from the exact definitions in NIST SP 811.
- Ounces here are avoirdupois ounces, a weight: 1 oz = 1/16 lb = 28.349523125 g. A US fluid ounce is a volume.
- Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up; an answer of 1 billion or more shows at most 15 significant digits.

## Worked examples

1. value = 1 gives result = 0.0625. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
2. value = 24 gives result = 1.5. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
3. result = 1.5 gives value = 24. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.

## FAQ

### How many pounds are in an ounce?

1 ounce is 0.0625 pounds, from the exact unit definitions (NIST SP 811).

### How do I convert oz to lbs?

Multiply by 0.0625: lb = oz × 0.0625 (the same as oz ÷ 16). For example, 1 oz × 0.0625 = 0.0625 lb.

### How do I convert lbs back to oz?

Multiply by 16, or type the pounds into the second box and the converter works it out. 1 pound is 16 ounces.

### Is an ounce here a weight or a volume?

A weight: the avoirdupois ounce, 1/16 of a pound (28.349523125 g exactly). A US fluid ounce (29.57 mL) measures volume, as on cups-to-ounces pages.

### What is 24 oz in pounds?

1.5 lb: 24 ÷ 16, or 1 lb 8 oz.

### How do I write ounces as pounds and ounces?

Divide by 16: the whole number is the pounds, and the ounces left over stay ounces. 40 oz is 2.5 lb, which is 2 lb 8 oz.

## Sources

- NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B.8: Factors for Units Listed Alphabetically (bold factors are exact), retrieved 2026-10-18. https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8
- NIST SP 811 (2008), footnotes to Appendix B: 1 lb = 0.45359237 kg exactly (footnote 22); 1 lbf = 4.4482216152605 N exactly with standard gravity, 9.80665 m/s² (footnote 23), retrieved 2026-10-18. https://www.nist.gov/pml/special-publication-811/nist-guide-si-footnotes