Use this calculator to get an idea of how much life and disability cover you need. The calculator can give you an idea of whether you are under- or over-insured. However for an accurate answer to how much you need, a qualified financial adviser is best placed to help you.
Also remember that this calculator works on the assumption that you are saving enough to provide for your retirement and that you won't need disability cover or to provide for a dependant, such as a spouse, after you retire as their needs will be covered by your or their retirement savings.