F&O Contract Value and Margin Planner

Work out contract value, blocked capital and exposure multiple for an NSE futures or options position. You supply the margin percentage — this page does not fetch live SPAN.

Worked example: futures / underlying price ₹22500, lot size 75, number of lots 1, margin required 12%. Change any input to recalculate.

Total Units
75 units
Contract Value
₹16,87,500.00
Estimated Margin
₹2,02,500.00
Exposure Multiple
8.33x

This calculator is for educational estimates only. Verify assumptions before making trading, investing, tax, or financial planning decisions.

This planner does not fetch live SPAN margin

Read this first, because it decides whether this is the right page for you. The real margin on an NSE contract is the exchange's SPAN risk figure plus an exposure margin. Both move with volatility and are republished through the trading day. This page does not fetch them. You supply the margin percentage, and it works out what the position costs you in capital.

If what you need is the live SPAN and exposure figure for a specific contract, use the NSE margin calculator or your broker's own SPAN tool — Zerodha and most brokers publish one. Bring that percentage back here to size the position.

What this page is for

Two questions, both of which need a rate you already have rather than one this site would have to guess at. How much capital does a given number of lots block? And what leverage is that — the exposure multiple, contract value divided by margin, which decides how far the position can move against you before the broker calls.

Enter the futures price (or the underlying price for options), the lot size for the contract, the number of lots, and the margin percentage from the exchange or your broker. Lot sizes are revised periodically, so take the current contract specification rather than an old sample value.

Contract Value = Price × Lot Size × Number of Lots Estimated Margin = Contract Value × Margin % Exposure Multiple = Contract Value ÷ Margin

Frequently Asked Questions

  • Use the exchange contract specification pages on NSE or BSE, or your broker's contract search tool. Index and stock F&O lot sizes are revised periodically.
  • SPAN or initial margin reflects exchange risk models for the contract, while exposure or additional margin is an extra buffer on top. Brokers may also impose stricter margin than exchange minimums.
  • No. Option buyers only need to pay the premium (strike premium × lot size). Margin requirements apply to option sellers (writers) and futures traders. This calculator is primarily for futures margin estimation.