The National Osteoporosis Foundation (NOF) suggests these guidelines for calcium and Vitamin D intake:
Adults age 50 and older need a total of 1,200 milligrams (mg) of calcium from all sources everyday. This includes the amount of calcium you get from both food and supplements. My advice? Do your best to get most of your calcium from calcium rich foods in your daily diet!
Adults age 50 and older need 800-1,000 international units (IUs) of vitamin D every day. Calcium is absorbed by your bones only if you have enough Vitamin D in your diet.