Question 1

How many lbs in a kg?

Accepted Answer

1 kg = 2.205 lbs. Quick math: double kg and add 10%. 70 kg ≈ 154 lbs.

Question 2

How do I convert kg to lbs quickly?

Accepted Answer

Multiply by 2.2 or double and add 10%. 50 kg = 110 lbs. 80 kg = 176 lbs.

Question 3

Is there a difference between mass and weight?

Accepted Answer

Yes! Mass (kg) is amount of matter, constant everywhere. Weight (newtons or pounds-force) is gravitational force on mass, varies by location.

Question 4

Why do jewelry and precious metals use different units?

Accepted Answer

Troy system (troy ounces, pennyweights) has been used for precious metals since the Middle Ages. 1 troy oz = 31.1g vs 1 regular oz = 28.35g.

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