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Ounces and Pounds vs. Grams

Converting ounces (ozs.) and pounds (lbs.) to grams (g).

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  • Mass is a measure of the amount of material in an object with kg in the SI-system and slugs in the Imperial system
  • Weight is the gravitational force acting on a body mass - Newton in the SI-system and pounds in the Imperial system

Note - it is not possible to convert pounds (or ounces) to kg (or grams) without including the force of gravity.

It is a common misconception to convert weight in pounds (ounces) to kg (grams) as mass as a measure of weight as indicated below.

Ounces and Pounds vs. Grams
Imperial Units (weight)SI-units (mass)
Ounces grams
1/4 (quarter) 7
1/2 (half) 14
3/4 (three quarters) 21
1 28.35
2 57
3 85
4 (quarter lb) 113
5 142
6 170
7 198
8 (half lb) 227
9 255 (1/4 kilo)
10 284
11 312
12 (3/4 lb) 340
13 369
14 397
15 425
16 (1 lb) 454
17 482
18 510 (1/2 kilo)
19 539
20 (1 1/4 lbs) 567
21 595
22 624
23 652
24 (1 1/2 lbs) 680
25 709
26 737
27 765 (3/4 kilo)
28 (1 3/4 lbs) 794
29 822
30 851
31 879
32 (2 lbs) 907
Mass in kg must be multiplied with acceleration of gravity (9.807 m/s2) to be comparable with weight in pounds.
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9.19.12

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