Sardines are one of the most non-dairy, nutrient dense forms of calcium with a 135g tin usually containing 363mg of calcium. Choose a good quality tin of sardines with the bones. I like the brands Parmentier or King Oscar. This lunch contains a whopping 561.5mg of calcium to show you just how easy it is to incorporate calcium in a non-dairy way to your diet. See tip below for calcium amounts of other ingredients.