Mass and weight are different but are always equated in science classes with the relationship: 454 G= 1 lb. This is further complicated because there is a pound-mass and a pound-force. The following conversion factors were obtain from a variety of physics books:
It is not clear from these conversion factors whether the authors are making reference to the pound-force or pound-mass. I feel that the pound as used, and measured, in the English system is the pound-force. The mechanism used in most bathroom scales is one that measures weight. If the bathroom scale is calibrated to measure pound-force, which is not clear by looking at it, then this calibration is accurate and valid only on earth.
In reality the relationship of 454 G=1 pound (force pound) holds only on earth. The graph below shows how the relationship between mass and weight would change on the other planetary bodies in our solar system for someone who might be "living" there. The relationship between mass and weight is inversely proportional to gravity. As gravity increases the number of grams needed to make one pound of weight decreases.
| g (ft/sec2) | g (M/sec2) | Grams / pound | |
| Sun | 900.3 | 274.41 | 16.2 |
| Mercury | 12.9 | 3.93 | 1132.2 |
| Venus | 28.9 | 8.81 | 505.4 |
| Earth | 32.2 | 9.81 | 453.6 |
| Moon | 5.5 | 1.67 | 2670.1 |
| Mars | 12.9 | 3.93 | 1132.2 |
| Jupiter | 86.8 | 26.46 | 168.3 |
| Saturn | 38.6 | 11.77 | 378.4 |
| Uranus | 32.2 | 9.81 | 453.6 |
| Neptune | 32.3 | 9.85 | 452.2 |
| Questions? Comments?? |
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