Unit converter
Includes Chinese 斤/两/亩 and US gallons — not just metric.
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How it's calculated
"斤" is 500 g (market catty) and "两" is 50 g; gallons are US; data units use base 1024 (KiB), unlike the base-1000 figures drive makers quote — which is exactly why "a 1TB drive shows only 931GB".