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Weight/Mass | Convert from libra [ancient Rome] to megatonne |
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Common Weight Conversions Metric Weight Conversions Unit Definition (libra [ancient Rome]) The libra [ancient Rome] is a traditional unit of weight. The libra was the Roman unit from which the English pound is descended; the symbol "lb" for the pound comes from this unit. The Roman libra contained only 12 unciae (ounces) and was about 0.722 English pound. The word "libra" is sometimes used now for the kilogram, a much larger unit. Unit Definition (megatonne) The megatonne is a metric unit of mass or weight equal to one million metric tons (tonnes), one teragram (Tg), or about 2.2046 billion pounds.
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