# Pounds and Ounces Calculator

URL: https://speedycalculator.com/calculators/conversion/pounds-ounces-calculator/
Last updated: 2026-10-25

> The pounds and ounces calculator converts decimal pounds into pounds and ounces (for example 7.4 lb = 7 lb 6.4 oz), and also adds up a weight given in pounds and ounces, with grams and kilograms for comparison.

## Inputs

- Weight in decimal pounds
- Or: pounds
- and ounces

## Results

- Whole pounds
- and ounces
- Total ounces
- In kilograms
- Pounds + ounces as decimal pounds
- Pounds + ounces in grams

## Formula

```
ounces = (decimal pounds − whole pounds) × 16
decimal pounds = pounds + ounces ÷ 16
```

## Explanation

Scales often show decimal pounds, but birth weights, recipes and fishing records use pounds and ounces. Because a pound has 16 ounces, 0.5 lb is 8 oz, not 5.

### How to use the Pounds and Ounces Calculator

- **Weight in decimal pounds**
- **Or: pounds**
- **and ounces**
- Every result field is editable: type into **Total ounces** or any other result and **Weight in decimal pounds** plus every other field update to match.

Results update as you type, and every field accepts the units shown in its menu.

### How it works

The whole-number part stays as pounds; the decimal part is multiplied by 16 to give ounces. The second section does the reverse.

### Inputs explained

FieldWhat to enterWeight in decimal poundsA numberOr: poundsA numberand ouncesA number

### What each result means

- **Whole pounds** = floor([Weight in decimal pounds])
- **and ounces** = ([Weight in decimal pounds] - floor([Weight in decimal pounds])) × 16
- **Total ounces** = [Weight in decimal pounds] × 16
- **In kilograms** = [Weight in decimal pounds] × 0.45359237
- **Pounds + ounces as decimal pounds** = [Or: pounds] + [and ounces] ÷ 16
- **Pounds + ounces in grams** = ([Or: pounds] + [and ounces] ÷ 16) × 453.59237

## Worked example

Inputs — Weight in decimal pounds: 7.4; Or: pounds: 7; and ounces: 6.

Results — **Whole pounds = 7**; and ounces = 6.4 oz; Total ounces = 118.4 oz; In kilograms = 3.3566 kg; Pounds + ounces as decimal pounds = 7.375 lb; Pounds + ounces in grams = 3,345.2 g.

## FAQ

**How many ounces is 0.4 lb?**
6.4 oz.

**What is 8 lb 4 oz in decimal pounds?**
8.25 lb.

**What formula does the Pounds and Ounces Calculator use?**
ounces = (decimal pounds − whole pounds) × 16.


## Sources

- [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)