Question 1

How do I convert body weight between systems?

Accepted Answer

kg × 2.205 = lbs. lbs ÷ 14 = stone. 70 kg = 154 lbs = 11 stone. Use for health, fitness tracking.

Question 2

What is a healthy body weight?

Accepted Answer

Use BMI: weight(kg)/height(m)². Normal BMI is 18.5-24.9. But muscle mass and body composition matter too.

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.

Body Weight Converter

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