As title suggests, I am looking for a motor which will slowly lift a weight, but I am getting myself confused with torque..

I THINK I am wanting a high torque motor, but I don't really know how to find out if it will be able to lift the weight I want (which is 1kg)

I have found this little one http://www.ebay.co.uk/itm/Uxcell-R-DC-12V-15RPM-High-Torque-Gear-Box-Reducer-Turbine-Worm-Geared-Motor-/291568669861?hash=item43e2d8d4a5:g:5tsAAOSwa-dWjK79

which I THINK is suitable, but I don't know what calculations I would need to do to work out if it is, can anyone help?

I would be supplying 12v though a battery (but assuming 10v for dropout) and a capacity of 7.2Ah, if that is at all useful.

Thanks