Margin Calculator for Trading
Leverage lets you control a bigger position than your actual capital — but it also means small price moves can have an outsized effect on your account. This free margin calculator trading tool estimates the margin you’ll need for Intraday, Futures, or Options (selling) positions, so there are no surprises when you place the order.
Understanding margin requirements in advance helps you plan your capital allocation across multiple positions and avoid situations where you’re unexpectedly short on funds mid-trade.
What Is Margin in Trading?
Margin is the amount of capital your broker requires you to deposit in order to open a leveraged position. Instead of paying the full value of a trade upfront, margin trading lets you control a larger position with a smaller amount of your own capital — amplifying both potential gains and potential losses.
How to Use This Margin Calculator
- Choose your segment — Intraday Equity, Futures, or Options (Sell)
- Enter your price per share and quantity
- Enter your leverage or margin percentage
- See your required margin, effective leverage, and a risk warning for high-leverage setups
Margin Requirements Vary by Segment
Intraday equity typically offers the highest leverage since positions are squared off the same day. Futures and Options margin requirements are calculated using SPAN and Exposure margin methodology set by the exchange, and tend to be a percentage of the total contract value rather than a simple multiplier.
Frequently Asked Questions
Is this the exact margin my broker will charge?
This is an indicative estimate. Actual margin is set by exchanges (SPAN + Exposure margin) and can vary by stock volatility and your broker’s policies — always confirm with your broker’s live margin calculator before trading.
Why is options selling margin so much higher than buying?
Selling (writing) options exposes you to theoretically unlimited risk, so exchanges require significantly more margin than simply buying an option, where your maximum loss is limited to the premium paid.
What happens if I don’t maintain required margin?
Your broker can trigger a margin call or forcibly square off your position if your account falls below the required margin level, often at an unfavourable price.
Does higher leverage mean higher risk?
Yes — higher leverage means a smaller adverse price move can cause proportionally larger losses relative to your invested capital.
A Note on Accuracy
Margin requirements referenced here are based on the SPAN and Exposure margin framework used by NSE India, though your broker’s exact figures may vary slightly. Before taking a leveraged position, it’s worth sizing it properly first — use our Position Size Calculator to keep your risk per trade consistent regardless of leverage.