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Convert Stone to Pennyweight (st to dwt) instantly with accurate, readable results.
Use our Mass Unit Converter to convert between grams, kilograms, pounds, ounces, and other weight units instantly. Designed for cooking, science, fitness, and engineering needs, this unit conversion tool offers accurate results between metric and imperial systems. Whether you’re tracking body weight, measuring ingredients, or handling heavy machinery, our mass unit conversion calculator has you covered.
Stone (st) — an imperial unit of mass equal to 14 pounds
It is defined as exactly 14 avoirdupois pounds; since 1 lb = 0.45359237 kg exactly, 1 st = 6.35029318 kg exactly. Used mainly in the United Kingdom and Ireland for measuring human body weight.
- Symbol: st
- System: Imperial unit for mass
- Exact relations: 1 st = 14 lb = 224 oz = 6.35029318 kg
- Metric equivalents: 1 st ≈ 6.35029 kg ≈ 6350.29 g
- Typical examples: a person weighing 10 st is 140 lb; a small adult ~8 st; a larger adult ~15 st.
Pennyweight (dwt) — a troy unit of mass for precious metals
It is defined as exactly 24 grains, or one twentieth of a troy ounce. Used mainly for measuring precious metals, jewelry, gemstones, dental alloys, and historical coin or bullion weights.
- Symbol: dwt
- System: Troy unit for mass
- Exact relations: 1 dwt = 24 gr = 1/20 oz t = 1.55517384 g
- Metric equivalents: 1 dwt = 1.55517384 g ≈ 0.00155517 kg
- Typical examples: small gold jewelry may weigh a few dwt; precious-metal scrap is often priced per dwt; 20 dwt equals 1 troy ounce.