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Conversion Formula:
Convert Scruple to Grain (s to gr) 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.
Scruple (℈) — an apothecaries’ unit of mass equal to 20 grains
It is defined as exactly 20 grains, or one third of an apothecaries’ dram; since 1 grain = 64.79891 mg exactly, 1 scruple = 1.2959782 g exactly. Used historically in pharmacy, medicine, and apothecaries’ weight systems, but now mostly encountered in historical references.
- Symbol: ℈
- System: Apothecaries’ unit for mass
- Exact relations: 1 scruple = 20 gr = 1/3 apothecaries’ dram = 1.2959782 g
- Metric equivalents: 1 scruple = 1.2959782 g ≈ 0.00129598 kg
- Typical examples: historical medicine recipes may list doses in scruples; 3 scruples equals 1 apothecaries’ dram; 1 scruple is a little heavier than 1 gram.
Grain (gr) — a small imperial and US customary unit of mass
It is defined as exactly 1/7000 of an avoirdupois pound; since 1 lb = 0.45359237 kg exactly, 1 gr = 64.79891 mg exactly. Used mainly for measuring bullets, gunpowder, arrows, and some pharmaceutical or historical masses.
- Symbol: gr
- System: Imperial and US customary unit for mass
- Exact relations: 1 gr = 1/7000 lb = 1/437.5 oz = 64.79891 mg
- Metric equivalents: 1 gr = 0.06479891 g ≈ 0.0000647989 kg
- Typical examples: a small bullet ~40 gr; a larger rifle bullet ~150 gr; an aspirin tablet was historically 5 gr.