Do a Google search for foods containing calcium. The article should provide the amount of calcium. For ex. milk contains about 300 mg per serving. I drink at least two glasses a day to provide 600 mg plus the vitamin D needed for the absorption of calcium. You can also get Vitamin D from sunshine. I take a multi-vitamin, so I take that into account. Packaged foods such as yogurt will have that information on the label.

If you eat certain foods regularly, you can google their calcium value and have a good idea as to whether you've met your requirement. 1600-2000 is pretty high and likely unnecessary. Recommendation in the states is for 1200 mg post-menopausal but the World Health Organization recommends 800 mg. If you're getting 1200 mg daily, that's plenty. I use the website cronometer.com to calculate my daily nutrition. Been using it for years so I now have a good idea as to what I should consume each day, not just in calcium but in other nutrients as well. I still check it most days as insurance that I've met all of my nutritional needs and if not, that's when I'll supplement accordingly. Highly recommend it.