Amtrak changed their policies for moving points out of their program a while ago to close a pretty gaping loophole that some FTers were exploiting to turn 25K points into 3 r/t tickets. They do now require that one have a co-branded CC or reach Select status (5K points in a calendar year) to export points.
You can transfer Amtrak points to CO at a 1:1 ratio, but you have to be qualified to move the points out of Amtrak. But you would call Amtrak to effect that transaction, not CO.
As for the converter tool, it is here (
http://www.insideflyer.com/tools/mileage_converter/) and it includes the following in the notes for the SPG=>CO transfer calculation:
Notes:
- Transfers in blocks of 5,000
- Effective January 1, 2008, the option to redeem Amtrak Guest Rewards points for airline miles or hotel points will only be available to: 1. Members with current Amtrak Guest Rewards Select or Select Plus status, or 2. Cardholders of the Amtrak Guest Rewards® MasterCard® issued by Chase Bank. Eligible members are still subject to the 25,000 and 50,000 annual point transfer caps as outlined in the program Terms and Conditions. 1. Members who are cardholders of the Amtrak Guest Rewards® MasterCard® issued by Chase Bank may redeem up to 25,000 points per calendar year. 2. Members with current Select or Select Plus status may redeem up to 50,000 points per calendar year.
Moving points from SPG to CO is not a great value because of the ratios and other troubles. CO and UA are bad targets for SPG points. Can you find better use of your SPG points elsewhere?