This converter turns any mass into all the others through the gram as an exact base unit. Metric steps by powers of ten (1 t = 1000 kg = 1,000,000 g, 1 g = 1000 mg = 1,000,000 μg). Imperial units use the international avoirdupois definitions: 1 pound = 16 ounce = 453.59237 g exactly, so 1 ounce = 28.349523125 g. The carat used for gemstones is 0.2 g exactly.
Chinese market units follow the modern metric-aligned definitions: 1 jin (斤) = 500 g, 1 liang (两) = 50 g, and 1 qian (钱) = 5 g, so 1 jin = 10 liang = 100 qian. Every result keeps 12 significant figures to remove floating-point noise, and switches to scientific notation only for extreme magnitudes. All math runs locally in your browser; nothing is uploaded.