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Convert Long Ton to Obolus (ton (Imp) to ob) 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.
Long ton (UK ton) — an imperial unit of mass equal to 2240 pounds
It is defined as exactly 2240 avoirdupois pounds; since 1 lb = 0.45359237 kg exactly, 1 long ton = 1016.0469088 kg exactly. Used mainly in the United Kingdom and some Commonwealth contexts for measuring large masses in shipping, industry, freight, and historical trade.
- Symbol: long ton, UK ton
- System: Imperial unit for mass
- Exact relations: 1 long ton = 2240 lb = 35,840 oz = 1016.0469088 kg
- Metric equivalents: 1 long ton ≈ 1016.05 kg ≈ 1.01605 t
- Typical examples: ship displacement may be measured in long tons; heavy freight can be listed in long tons; 1 long ton is slightly heavier than a metric ton.
Obolus (obol) — a historical unit of mass equal to 10 grains
It is commonly treated as half a scruple, or 10 grains, in historical Roman and apothecaries’ weight contexts; because the obolus was also a coin and ancient weight term, its exact value can vary by period and region. Used mainly in historical medicine, pharmacy, numismatics, and references to ancient or apothecaries’ measures.
- Symbol: obol, obolus
- System: Historical Roman and apothecaries’ unit for mass
- Exact relations: 1 obolus = 1/2 scruple = 10 gr = 647.9891 mg
- Metric equivalents: 1 obolus = 0.6479891 g ≈ 0.000647989 kg
- Typical examples: historical prescriptions may mention oboli; 2 oboli equals scruple; 1 obolus is a little less than 2/3 of a gram.