This capital gains calculator matches in excess of 10,000 share trades according to the Inland Revenue's share matching rules. Simply paste your trades into the box below and click the CALCULATE button. Alternatively if your trades are in *.txt or *.csv format then you can drag and drop or use file upload. Check other pages for instructions and examples. Use the conversion utilities to directly use your online broker's trade history information. Click here for info on printing/saving.