Once we understand stock to flow, we can apply it to gold.

Gold was one of the main inspirations for PlanB in creating stock to flow.

## Gold Stock to Flow Value

To calculate the stock to flow value of gold, we need to know two things:

- The amount of gold that exists above ground
- The amount of gold mine each year

## Calculations

According to gold.org, there are 208,874 tonnes of gold that have been mined.

According to Provident Metals, around 2,500 - 3,000 tonnes of gold are mined each year. Let’s use 2,750 as an estimate.

`208,874 tonnes / 3,000 tonnes mined per year = 69.62 stock to flow`

## Market Cap From Stock to Flow

Using PlanB’s stock to flow formula, the estimated market cap of gold based on a 75.95 stock to flow value would be:

$2.64 trillion USD

This is the formula:

Gold Estimated Market Cap based on stock to flow model:

`math.exp(14.6) * math.pow(69.62, 3.3)`

The current actual market cap of gold?

Around $13.39 trillion USD.

## Gold Value Using Stock to Flow Cross Asset

When PlanB made his original stock to flow formula, only Bitcoin’s priced was used in the data.

PlanB later came out with a new formula for stock to flow, called the stock to flow cross asset model.

This time, PlanB incorporated gold, silver, Bitcoin and other metals into his calculations.

## Gold Value Using Stock to Flow Cross Asset

When we calculate the estimated market value of gold using stock to flow cross asset, we get:

13.41 trillion USD

This is the formula:

Gold Estimated Market Cap based on stock to flow cross asset:

`math.exp(12.7598) * math.pow(69.62, 4.1167)`