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Essentially based on the calcium information I have on these brands of water bottles brands, how can I calculate the daily % value of calcium they give?

Fiji water = 17mg/L Calcium Evian water = 78mg/L Calcium

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For calcium it depends on age and gender, as shown in this chart:

enter image description here

So for a male aged 19-50, 1 liter of Fiji water would be:

17 / 1000 = .017, or 1.7% of the RDV

And 1 liter of Evian would be:

78 / 1000 = .078, or 7.8% of the RDV

In other words, if you're looking for calcium in bottled water, you're looking in the wrong place. It's the most expensive possible source of calcium you could choose and not a very good one.

As Mayo notes:

Your body doesn't produce calcium, so you must get it through other sources. Calcium can be found in a variety of foods, including:

  • Dairy products, such as cheese, milk and yogurt
  • Dark green leafy vegetables, such as broccoli and kale
  • Fish with edible soft bones, such as sardines and canned salmon
  • Calcium-fortified foods and beverages, such as soy products, cereal and fruit juices, and milk substitutes

To absorb calcium, your body also needs vitamin D. A few foods naturally contain small amounts of vitamin D, such as canned salmon with bones and egg yolks. You can also get vitamin D from fortified foods and sun exposure. The RDA for vitamin D is 600 international units (15 micrograms) a day for most adults.

Notice that they don't mention water.

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