Resin/Hardner mixing ratio

I am doing some repair work to a fibreglass tender and need to repair a small area. Can anybody tell me the mixing ratio for resin to hardener in mils as i can only find this ratio in weights which is difficult to determine with small amounts.

It weighs almost the same as water which is the basis of volume/weights system, a 1 kilo= 1 litre .
So 1Kg = 1L, and 1 ml = 1 gram, close as you need to measure it.

Thanks for your help.