Pounds and Ounces to Grams Converter
What Are Pounds and Ounces?
The pound (lb) and ounce (oz) are imperial units of mass. 1 pound = 16 ounces. They are used in the US and UK for cooking, postal weights, and baby weights.
What Is a Gram?
The gram (g) is a metric unit of mass equal to 1/1,000 of a kilogram. It is the worldwide standard for cooking, nutrition labels, and precise measurements.
Lbs and Oz to Grams Formula
grams = (lb × 16 + oz) × 28.349523125 exact
Or equivalently: grams = lb × 453.59237 + oz × 28.349523125
Both factors are exact, derived from 1 lb = 0.45359237 kg (1959 International Agreement).
Worked Example
Convert 2 lb 4 oz (a typical bag of flour) to grams:
- Total ounces: 2 × 16 + 4 = 36 oz
- Multiply: 36 × 28.3495 = 1,020.6 grams
Quick Estimation
Multiply ounces by 28 and pounds by 454 for quick estimates. Example: 1 lb 8 oz = 454 + (8 × 28) = 454 + 224 = 678 g (actual: 680.4 g — within 0.4%).
Common Use Cases
- Cooking: converting US recipes (lb + oz) to metric (grams) for kitchen scales
- Baby weight: birth weight recorded as "7 lb 4 oz" → grams for medical records
- Postal/shipping: package weights in lb + oz → grams for international labels
- Nutrition: converting imperial food portions to metric for calorie tracking
Pounds and Ounces to Grams Conversion Table
| lb + oz | Grams | Use |
|---|---|---|
| 1 oz | 28.35 g | Small ingredient |
| 2 oz | 56.70 g | Cheese portion |
| 4 oz (¼ lb) | 113.40 g | Stick of butter |
| 8 oz (½ lb) | 226.80 g | Steak, pasta |
| 12 oz (¾ lb) | 340.19 g | Can of soda |
| 1 lb | 453.59 g | Flour, sugar |
| 1 lb 4 oz | 566.99 g | Bread loaf |
| 1 lb 8 oz | 680.39 g | Large steak |
| 2 lb | 907.18 g | Bag of rice |
| 2 lb 4 oz | 1,020.58 g | Bag of flour |
| 3 lb | 1,360.78 g | Chicken |
| 5 lb | 2,267.96 g | Bag of potatoes |
| 7 lb 4 oz | 3,288.54 g | Average newborn |
| 8 lb 8 oz | 3,855.54 g | Large newborn |
| 10 lb | 4,535.92 g | Heavy package |
Frequently Asked Questions
How many grams are in a pound?
1 pound = 453.59237 grams exactly (1959 International Agreement).
How many grams are in an ounce?
1 ounce = 28.349523125 grams exactly (1 pound ÷ 16).
How do I convert a recipe from lbs and oz to grams?
Multiply pounds by 454 and ounces by 28, then add. Example: 1 lb 8 oz = 454 + 224 = 678 g. For exact results, use the calculator above.
What is 7 lb 4 oz in grams? (baby weight)
7 lb 4 oz = 3,288.5 grams = 3.289 kg. This is the average birth weight for a full-term baby.
Is this the same as the oz to grams converter?
Our ounce to gram converter handles ounces only. This converter accepts both pounds and ounces together (e.g., 2 lb 4 oz) and outputs grams.
Related Weight Converters
- Kg to Lbs and Oz — reverse: metric to lb + oz
- Lbs and Oz to Kg — convert lb + oz to kilograms
- Ounces to Grams — simple oz → g
- Grams to Ounces — simple g → oz
- Pounds to Kilograms — simple lb → kg
- Kg to Stones & Pounds
- Stones & Pounds to Kg
- Pounds to Stones & Lbs
- Oz to Grams Table — printable reference (1–48 oz)
- Lbs & Oz to Grams Table — cooking & baby weight (1-240 oz)
- All Weight Converters
All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.
