Average cost calculator
Short answer: Add up everything you paid and divide by the total grams you own. Three purchases of 31.1 g for 1,950, 10 g for 640 and 50 g for 3,300 come to 91.1 g for 5,890, an average cost of about 64.65 per gram.
How to use it
- Enter the weight in grams and the total price paid for each purchase, including premium, shipping and fees.
- Add a row for every purchase of the same metal. Use a separate run for each metal.
- Enter today's spot price per troy ounce.
- Read your average cost per gram, your value at spot and your gain or loss.
Formula: average cost per gram = total paid ÷ total grams (not the average of the per-gram prices)
Questions
Why not just average the per-gram prices?+
Because purchases differ in size. A 100 g bought cheaply and a 1 g bought at a high price should not count equally. Total cost over total weight gives each gram the same weight.
Should I include shipping and fees?+
Yes. They are part of what the metal cost you, so including them gives your true cost basis and a fair gain figure.
Can I mix gold and silver?+
No. Cost per gram only means something within one metal, so run the calculator once for each.
How does this relate to cost basis?+
Cost basis is the total amount you paid. The average cost per gram is that total spread evenly over the weight, which lets you compare it with the spot price per gram.
Related
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