REGIONAL WEIGHTS · CHOOSE THE DEFINITION
Catty to Pounds & KG: Mainland, Hong Kong, Taiwan
Convert catty or jin to pounds, kg and grams using an explicit mainland China, Hong Kong or Taiwan definition. Reverse the conversion and compare regional values.
Sources checked 2026-10-15 · Free to use · Inputs stay in your browser
Changing the region changes the catty definition, while kg, grams and international pounds stay fixed. Confirm the seller’s unit; this is not a medicine dosage calculator.
Why one catty can give different answers
Catty is an English name used for several local weight units. Modern mainland jin is 500 g; Taiwan tai-jin is 600 g; Hong Kong sima catty is 604.78982 g. A seller’s region and stated measurement practice matter. Choose that definition before entering the quantity.
| Definition | 1 catty in kg | 1 catty in lb | 100 catty in kg |
|---|---|---|---|
| Mainland China | 0.5 | 1.102311 | 50 |
| Hong Kong · sima catty | 0.60478982 | 1.333333 | 60.478982 |
| Taiwan · tai-jin | 0.6 | 1.322774 | 60 |
Formula and reverse conversions
Kilograms = catty × the selected kg-per-catty factor. Pounds = kilograms ÷ 0.45359237. To reverse it, kilograms ÷ the factor gives catty; pounds first convert to kilograms. Calculations retain full factors and round only for display.
Example: 100 catty is not always 50 kg
100 mainland catty is 50 kg, 100 Taiwan tai-jin is 60 kg, and 100 Hong Kong sima catty is 60.478982 kg. The default remains mainland China so that existing mainland examples keep their meaning. Confirm which unit an overseas seller is using.
Sources and scope
- Taizhou government unit table: mainland 1 jin = 500 g.
- Taiwan BSMI measurement reference (PDF): 1 tai-jin = 0.6 kg.
- Hong Kong Chinese Medicine Council measurement-unit reference (PDF, appendix on units): sima catty = 0.60478982 kg. Only the unit definition is used here.
- NIST SP 811 (PDF): 1 international pound = 0.45359237 kg.
Sources checked 2026-10-15. This tool does not apply these factors to historical dynasties, Singapore/Malaysia kati, tael or medicinal prescriptions.
Related tools
Examples and related conversions
Open a specific example, then edit its inputs to calculate your own result.
Reference answer
Mainland catty/jin is 500 g, Taiwan tai-jin is 600 g, and Hong Kong sima catty is 604.78982 g. Select the region before converting.
Scope: One international pound is 0.45359237 kg. The region changes the catty factor, not the pound.
Source: Regional references and exact factors · Method and verification limits