Convert Pounds (lb) to Grams (g)

Q: How many grams are in 1 pound?

Exactly 453.59237 grams. For quick estimates, use 454 g. A pound is roughly half a kilogram (0.4536 kg).

Q: How many grams in half a pound?

Half a pound = 226.8 g (453.59 ÷ 2). This is also exactly 8 ounces — a common serving size in US packaging.

1 pound equals 453.592 grams.

Formula: g = lb × 453.592

Pound to Gram Converter

What Is a Pound?

The pound (lb) is a unit of mass in the imperial and US customary systems. It is used for body weight, groceries, and general commerce in the US, UK, and a few other countries.

What Is a Gram?

The gram (g) is a metric unit of mass equal to 1/1,000 of a kilogram. Used globally in science, cooking, and medicine for precise small-mass measurements.

Pounds to Grams Formula

The conversion factor is exact:

grams = pounds × 453.59237 exact

This is derived directly from the international definition: 1 lb = 0.45359237 kg = 453.59237 g exactly.

Worked Example

Convert 1.5 lb (a loaf of bread) to grams:

Multiply: 1.5 × 453.592 = 680.4 g

Quick Estimation

Multiply pounds by 450 for a quick approximation. 1.5 × 450 = 675 g (actual: 680.4 g — within 0.8%).

Common Use Cases

Cooking: Converting US recipes to metric. A recipe calling for 2 lb of flour = 907 g (≈ 900 g for practical purposes).
International shipping: US parcels weighed in pounds must be converted to grams or kilograms for international labels.
Grocery shopping: Comparing US and metric product labels. A 3 lb bag of apples = 1,361 g ≈ 1.36 kg.

Frequently Asked Questions

How many grams are in 1 pound?

Exactly 453.59237 grams. For quick estimates, use 454 g. A pound is roughly half a kilogram (0.4536 kg).

How do I convert pounds to grams without a calculator?

Multiply by 450 for a quick estimate (within 0.8%). Example: 3 lb × 450 = 1,350 g (exact: 1,360.8 g). For better accuracy, multiply by 454.

What is the difference between pounds and grams?

Pounds are imperial; grams are metric. One pound = 453.59 g, so a pound is about 454 times heavier than a gram. Grams are used for precision (cooking, science); pounds for everyday weighing in the US.

How many grams in half a pound?

Half a pound = 226.8 g (453.59 ÷ 2). This is also exactly 8 ounces — a common serving size in US packaging.

Common Pound to Gram Conversions

Pound to Gram (Part 1)

Pound to Gram common conversions part 1
Pound	Gram	Actions
14 pounds	113.398 grams
12 pounds	226.796 grams
1 pound	453.592 grams
2 pounds	907.185 grams

Pound to Gram (Part 2)

Pound to Gram common conversions part 2
Pound	Gram	Actions
3 pounds	1360.78 grams
5 pounds	2267.96 grams
10 pounds	4535.92 grams
20 pounds	9071.85 grams

Pounds to grams Conversion Table

Reference table with common pounds to grams conversions. All values calculated with high precision.

Pounds to Grams Table
0.0001 to 12

Pounds	Grams	Actions
0.0001 lb	0.0453592 g
0.00025 lb	0.113398 g
0.0005 lb	0.226796 g
0.001 lb	0.453592 g
0.0025 lb	1.13398 g
0.005 lb	2.26796 g
0.01 lb	4.53592 g
0.025 lb	11.3398 g
0.05 lb	22.6796 g
0.1 lb	45.3592 g
14 lb	113.398 g
12 lb	226.796 g

Pounds to Grams Table
1 to 100000

Pounds	Grams	Actions
1 lb	453.592 g
2 12 lb	1133.98 g
5 lb	2267.96 g
10 lb	4535.92 g
25 lb	11339.8 g
50 lb	22679.6 g
100 lb	45359.2 g
250 lb	113398 g
500 lb	226796 g
1000 lb	453592 g
2500 lb	1133980 g
5000 lb	2267960 g
10000 lb	4535920 g
25000 lb	1.13398 × 10⁷ g
50000 lb	2.26796 × 10⁷ g
100000 lb	4.53592 × 10⁷ g

Grams to Pounds Table
0.1 to 500

Grams	Pounds	Actions
0.1 g	0.000220462 lb
14 g	0.000551156 lb
12 g	0.00110231 lb
1 g	0.00220462 lb
2 12 g	0.00551156 lb
5 g	0.0110231 lb
10 g	0.0220462 lb
25 g	0.0551156 lb
50 g	0.110231 lb
100 g	0.220462 lb
250 g	0.551156 lb
500 g	1.10231 lb

Grams to Pounds Table
1000 to 1 × 10⁸

Grams	Pounds	Actions
1000 g	2.20462 lb
2500 g	5.51156 lb
5000 g	11.0231 lb
10000 g	22.0462 lb
25000 g	55.1156 lb
50000 g	110.231 lb
100000 g	220.462 lb
250000 g	551.156 lb
500000 g	1102.31 lb
1000000 g	2204.62 lb
2500000 g	5511.56 lb
5000000 g	11023.1 lb
10000000 g	22046.2 lb
2.5 × 10⁷ g	55115.6 lb
5 × 10⁷ g	110231 lb
1 × 10⁸ g	220462 lb

Looking for the reverse? Convert Gram to Pound

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Conversion factors verified against NIST (National Institute of Standards and Technology), BIPM (International Bureau of Weights and Measures) 1 lb = 0.45359237 kg by international agreement (1959). Last reviewed: March 2026

By Adilson Fernandes

Reviewed by Tiago Fernandes

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.