Business & Financial Analysis

Margin Calculator

Profit Margin Calculator

Calculate the profit margin of making or trading products. Please provide any two of the following to calculate the rest values.

Cost ($)
Revenue ($)
Margin (%)
Profit ($)

Stock Trading Margin Calculator

Calculate the required amount or maintenance margin needed for investors to make securities purchase on margin.

Stock price ($)
Number of shares
Margin requirement (%)

Currency Exchange Margin Calculator

Calculate the minimum amount to maintain in the margin account to make currency trading.

Exchange rate (home currency per unit)
Margin ratio (%)
Units to purchase

About This Margin Calculator

The Margin Calculator is a versatile financial tool that helps you understand profit margins, stock trading requirements, and forex margin needs. Whether you're a business owner calculating product profitability, an investor trading on margin, or a forex trader managing leverage, this tool provides instant, accurate calculations to support informed financial decisions.

How to Use

1. Select a Tab — Choose between Profit Margin, Stock Trading Margin, or Currency Margin calculator.
2. Profit Margin Mode — Enter any two values (Cost, Revenue, Margin %, or Profit) to calculate the remaining two automatically.
3. Stock Margin Mode — Enter stock price, number of shares, and margin requirement to see your required investment.
4. Forex Margin Mode — Enter exchange rate, margin ratio, and units to calculate the required margin amount and leverage.
5. Click Calculate — Press the Calculate button to see detailed results including visual representations and formulas.

How It Works & Formula

Margin calculations vary by context but all measure the relationship between cost, revenue, and profit, or the amount of capital required for leveraged trading.

Profit Margin = (Revenue − Cost) / Revenue × 100%

Where:
Cost = The amount spent to produce or acquire the product.
Revenue = The total income from selling the product.
Profit Margin = The percentage of each dollar that remains as profit.
Markup = (Revenue − Cost) / Cost × 100%

Stock Margin Required = Stock Price × Shares × (Margin Requirement % / 100)

Stock Margin Formula:
The amount you must invest = Total position value × Margin percentage. The remainder is borrowed from the broker.

Forex Margin Required = Units × Exchange Rate × (Margin Ratio % / 100)

Forex Margin Formula:
Leverage = 100 / Margin Ratio. A 2% margin ratio gives 50:1 leverage, meaning you control $50 of currency for every $1 of your own money.

Mathematical Expressions

M = (R - C) / R × 100%

Sreq = P × N × (MR / 100)

Freq = U × E × (MRfx / 100)

Real-Life Examples

Profit Margin Example: A company buys a product for $40 (cost) and sells it for $100 (revenue).

Profit = $100 − $40 = $60
Margin = $60 / $100 × 100% = 60%
Markup = $60 / $40 × 100% = 150%

For every dollar of revenue, the company keeps 60 cents as profit before other expenses.

Stock Margin Example: You want to buy 200 shares of a $100 stock with a 50% margin requirement.

Total position = 200 × $100 = $20,000
Your required investment = $20,000 × 50% = $10,000
Borrowed amount = $10,000

You control $20,000 worth of stock with only $10,000 of your own money, effectively doubling your purchasing power — and your risk.

Forex Margin Example: Trading 100,000 units of EUR/USD at 1.20 exchange rate with 2% margin requirement.

Total position = 100,000 × 1.20 = $120,000
Required margin = $120,000 × 2% = $2,400
Leverage = 50:1

With just $2,400, you control a $120,000 currency position. A 1% move in your favor doubles your investment, but a 1% against you wipes it out.

Tip: Higher leverage means higher potential returns AND higher potential losses. Always understand your risk tolerance before trading on margin.

Margin & Markup Reference Table

Quick reference showing how different markups translate into profit margins.

Markup %Profit Margin %Cost MultiplierExample (Cost $100)
10%9.09%1.10xSell at $110 → Profit $10
25%20.00%1.25xSell at $125 → Profit $25
50%33.33%1.50xSell at $150 → Profit $50
75%42.86%1.75xSell at $175 → Profit $75
100%50.00%2.00xSell at $200 → Profit $100
150%60.00%2.50xSell at $250 → Profit $150
200%66.67%3.00xSell at $300 → Profit $200
300%75.00%4.00xSell at $400 → Profit $300

Formula: Margin = Markup / (1 + Markup) | Markup = Margin / (1 − Margin)

Frequently Asked Questions

What is the difference between profit margin and markup? +
Profit margin is calculated as profit divided by revenue (selling price), showing what percentage of each dollar you keep. Markup is calculated as profit divided by cost, showing how much you add to the cost. For example, 50% markup equals 33.33% margin.
What is a margin call? +
A margin call occurs when the equity in your margin account falls below the broker's required maintenance margin (typically 25%). You must deposit additional funds or sell securities to bring the account back to required levels, or the broker may liquidate your positions.
What is a good profit margin? +
Good profit margins vary by industry. Retail typically sees 2-10% margins, restaurants 3-15%, software companies 70-90%, and consulting firms 15-25%. Compare within your specific industry for meaningful benchmarks.
What is leverage in forex trading? +
Leverage allows traders to control larger positions with smaller capital. For example, 50:1 leverage means $1 controls $50 in currency. While this amplifies potential profits, it also magnifies losses. Most retail forex traders use leverage between 10:1 and 50:1.
What is the maintenance margin requirement? +
Under Regulation T, the initial margin requirement is 50% with a maintenance margin of 25%. This means you must maintain at least 25% equity in your margin account. If your equity falls below this, you'll receive a margin call.
How does margin trading affect taxes? +
Margin interest is tax-deductible for investors who itemize deductions, but only up to the amount of net investment income. Complex rules apply, so consult a tax professional. Capital gains and losses from margin trading are treated like any other investment gains.

Related Calculators & Resources

Related Reading

• Understanding Gross vs Net Profit Margin – Key differences every business owner should know.
• How to Improve Profit Margins – Strategies for increasing profitability without raising prices.
• Margin Trading Risks – Complete guide to understanding margin calls and risk management.
• Leverage in Forex – How different leverage ratios affect your trading strategy.

Understanding Margin

Profit Margin

Profit margin = (Revenue - Cost) / Revenue × 100%. It shows how much profit you keep from each dollar of sales.

Markup

Markup = (Revenue - Cost) / Cost × 100%. It shows how much you add to the cost to determine selling price.

Margin Trading

Buying securities with borrowed funds. Initial margin is typically 50%, maintenance margin minimum 25% (regulatory).

Forex Margin

Leverage allows trading larger positions with a small deposit. 2% margin = 50:1 leverage.