Calculate required margin, buying power and leverage from stock price, shares and margin rate. Client-side only — your data stays private.
Margin trading amplifies both gains and losses. Enter the stock price, number of shares, margin rate and maintenance margin to calculate required margin, borrowed amount, leverage ratio and the margin call warning price. 💹 No sign-up · Client-side calculation
The Stock Margin Calculator is a free online tool that runs entirely in your browser — no software installation required. Your data is processed locally and never uploaded to any server. Works on all major browsers and mobile devices. This tool helps you quickly assess margin requirements, leverage and risk levels for stock trading. All processing happens client-side for fast, secure, and reliable performance.