# Stock Trading Margin Calculator

Calculate stock trading margin with our free online tool. Determine your buying power and margin requirements for stock trades.

To calculate the required amount of margin to achieve a desired profit, input the cost and profit margin percentage. The calculator will then calculate the selling price and the margin required to achieve the desired profit.

## What is Margin?

Margin is the difference between the cost of an item and its selling price. It is usually expressed as a percentage of the selling price.

For example, if an item costs $10 and sells for $15, the margin would be $5, or 33.33%.

### What is Profit?

Profit is the difference between the selling price and the cost of an item. It is usually expressed as a dollar amount.

For example, if an item costs $10 and sells for $15, the profit would be $5.

## What is a share?

A share is a unit of ownership in a company. When you buy a share of stock, you are buying a small piece of the company.

For example, if a company has 1,000,000 shares outstanding and you own 10,000 shares, you own 1% of the company.

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