Convert a gold price quoted per gram, kilogram, troy ounce, tola,
pennyweight or grain into the equivalent price per milligram. You can also
estimate the value of a specific milligram weight using the calculated
unit price.
What Is Gold Price per Milligram?
Gold is commonly quoted per gram or per troy ounce, but very small
quantities of gold may need to be evaluated in milligrams. A milligram is
one-thousandth of a gram, making it useful when discussing tiny gold
quantities, laboratory samples, fine particles and very small weights.
The gold price per milligram is simply the equivalent price of one
milligram based on a larger-unit gold quotation.
1 gram = 1,000 milligrams
Therefore, when the price is quoted per gram, the price per milligram is
obtained by dividing the gram price by 1,000.
How to Calculate Gold Price per Milligram
The calculation depends on the unit used for the original price quotation.
First, the calculator converts the quoted unit into grams. It then divides
the resulting price by 1,000.
Price per Milligram =
Price per Gram ÷ 1,000
For example, if gold is quoted at 100 per gram:
100 ÷ 1,000 = 0.10 per milligram
This is a unit conversion only. It does not mean that a dealer must sell a
single milligram of gold for exactly that amount.
Gold Price per Milligram from Different Units
Gold prices can be quoted using several weight systems. The calculator
handles the conversion automatically.
| Price Basis |
Weight in Milligrams |
Conversion to Price per mg |
| Per Gram |
1,000 mg |
Price ÷ 1,000 |
| Per Kilogram |
1,000,000 mg |
Price ÷ 1,000,000 |
| Per Troy Ounce |
31,103.4768 mg |
Price ÷ 31,103.4768 |
| Per Tola |
11,663.8125 mg |
Price ÷ 11,663.8125 |
| Per Pennyweight |
1,555.17384 mg |
Price ÷ 1,555.17384 |
| Per Grain |
64.79891 mg |
Price ÷ 64.79891 |
Gold Price per Milligram Example
Assume the gold price is 2,000 per troy ounce. One troy ounce contains
31,103.4768 milligrams.
2,000 ÷ 31,103.4768
≈ 0.064301 per mg
The equivalent price is therefore approximately 0.0643 per milligram.
Multiplying that unit price by any number of milligrams gives the
corresponding underlying metal value.
500 mg × 0.064301
≈ 32.15
The actual retail price of a 500 mg gold product can be higher because the
product may carry a premium or other costs.
How Many Milligrams Are in Common Gold Weights?
| Gold Weight |
Milligrams |
| 0.001 gram |
1 mg |
| 0.01 gram |
10 mg |
| 0.1 gram |
100 mg |
| 1 gram |
1,000 mg |
| 5 grams |
5,000 mg |
| 10 grams |
10,000 mg |
| 1 troy ounce |
31,103.4768 mg |
| 1 tola |
11,663.8125 mg |
Gold Purity and Price per Milligram
Purity becomes important when comparing the intrinsic gold content of
different products. A milligram of 24K gold does not contain the same
amount of fine gold as a milligram of 18K gold.
| Purity |
Approximate Fine-Gold Fraction |
Fine Gold in 1 mg |
| 24K |
0.999 |
≈ 0.999 mg |
| 22K |
0.9167 |
≈ 0.9167 mg |
| 21K |
0.875 |
0.875 mg |
| 18K |
0.750 |
0.750 mg |
| 14K |
0.5833 |
≈ 0.5833 mg |
| 10K |
0.4167 |
≈ 0.4167 mg |
The purity adjustment is useful when comparing fine-gold content. It should
not be applied a second time if the quoted price already represents the
exact price of the finished lower-purity product.
Calculating the Value of a Small Gold Weight
Once the price per milligram is known, the underlying value of a small gold
weight can be calculated directly.
Gold Value =
Weight in Milligrams × Price per Milligram
For example, if the converted gold price is 0.08 per milligram, a 250 mg
quantity has an underlying value of:
250 × 0.08 = 20
This calculation is particularly useful when evaluating very small
quantities where a per-gram price may be less intuitive.
Where a Milligram Price Is Useful
Small gold quantities
Milligrams provide a convenient unit when the quantity is substantially
below one gram.
Comparing quoted prices
Converting different quotations to the same unit makes mathematical
price comparisons easier.
Fine-gold content analysis
A milligram basis can help compare the fine-gold content of very small
samples when the purity is known.
Small-scale valuation
A price-per-milligram figure can be multiplied by a measured weight to
estimate the underlying metal value.
Price per Milligram Is Not Always a Retail Price
Mathematical unit conversion and actual retail pricing are different
concepts. A bullion dealer, jewellery manufacturer or retailer may charge
more than the underlying market value of the metal.
Depending on the product, the final price can include premiums, fabrication
costs, dealer margins, taxes, shipping and other transaction costs.
Use the calculator to establish a comparable unit price. For an actual
purchase, use the seller's final quoted price and verify the stated weight
and purity.
Important Limitations
This calculator does not retrieve live market prices. You provide the gold
price used in the calculation.
The conversion constants are based on standard mass relationships. One
troy ounce is 31.1034768 grams, while one avoirdupois ounce is different.
Gold and other precious metals are normally quoted using the troy-ounce
system.
The result represents the entered price converted to a milligram basis. It
does not establish the authenticity, purity or marketability of a physical
gold item.
Frequently Asked Questions
How do I calculate gold price per milligram?
Convert the quoted price to a gram basis and divide it by 1,000. For example,
100 per gram equals 0.10 per milligram.
How many milligrams are in one gram of gold?
One gram contains exactly 1,000 milligrams.
Can I convert gold price per troy ounce to price per milligram?
Yes. One troy ounce equals 31,103.4768 milligrams, and the calculator performs
that conversion automatically.
Does gold purity affect the price per milligram?
Purity affects the amount of fine gold contained in a milligram of alloy. The
basic unit conversion itself does not change the entered price quotation.
Can I calculate the value of a small gold weight?
Yes. Enter the optional weight and the calculator will estimate its value from
the converted price.
Which gold price units does this calculator support?
It supports price per gram, kilogram, troy ounce, tola, pennyweight and grain.
Does this calculator use live gold prices?
No. Enter the gold price you want to use.
Is the result the exact retail price of physical gold?
No. It is a mathematical conversion. Actual retail pricing may include
premiums, taxes, making charges, spreads and other costs.