Bank Nifty Lot Size Calculator and Current NSE Quantities

Bank Nifty lot size is 30 units for the October, November and December 2026 series in NSE's market-lot file, checked 15 October 2026. Nifty lot size is 65 units for those series. The calculator above has a mismatch: its Bank Nifty label says 30, but its sizing calculation uses 65. Confirm quantities separately and use the worked arithmetic below until that calculation is corrected.

Current NSE index lot sizes

A lot is the contract's quantity multiplier. The number of lots is how many of those contract quantities you hold. For example, 2 Bank Nifty lots represent 2 × 30 = 60 units. Lot size is not the premium, the margin deposit or a rupee amount you choose according to account size.

NSE lists separate columns for contract months in its market-lot file. Blank later columns do not establish a zero quantity or a future contract specification. When a revision is announced, use the contract month and transition details rather than assuming every existing contract changes on the announcement day.

Lots to quantity: one to ten Bank Nifty lots

Quantity in an order is units, not lots. Your broker may ask for either, so read the order screen before you confirm. The table multiplies the 30-unit lot by the number of lots. The last column shows the rupee change from a one-point move in the contract price.

One point on a futures price is worth the lot size in rupees, so a 30-unit lot moves ₹30 for each point. For options, a one-point move in the index does not move the premium by one point. See the options Greeks calculator for how sensitive a premium is to the index.

Why older Bank Nifty quantities appear online

NSE circular NSE/FAOP/70616, dated 3 October 2025, revised Bank Nifty from 35 to 30 and Nifty from 75 to 65. The circular took effect at the end of 28 October 2025. It retained old sizes for weekly and monthly contracts through the 30 December 2025 expiry, and revised existing quarterly and half-yearly contract lots at the end of 30 December 2025. Its annexure lists 27 January 2026 as the first monthly expiry with revised sizes.

Those transition dates explain why a historical trade record can legitimately contain another quantity. They do not make an older article a current reference. For the current series in the table, the opened market-lot file confirms the quantities directly. The lot-size reference table covers the broader reference task.

Bank Nifty lot size history

Searches for "Bank Nifty lot size 25", "15", "35" and "30" all come from real past values. NSE has changed the number several times. The table lists the changes found in broker notices and the NSE circular already cited above. Dates are when the new size began for the contracts named.

A trade record from 2024 or 2025 can therefore show 15, 30 or 35 units and still be correct for its date. Always use the size that applied to the contract and month you traded when you check old results.

What the calculator asks for

Risk-based sizing starts with the money you plan to lose if a stop executes at the assumed price. It does not establish the funds a broker requires or the maximum loss possible. The tool does not check current margin, contract availability, spread benefits, charges or execution prices.

Its Units card and Lots (30 units) card do not currently use a consistent Bank Nifty quantity. In some cases the underlying shared calculation falls back to cash-market units when it cannot make a lot using its wrong multiplier. Bank Nifty's cash index is not a cash share that can be bought in that returned quantity. Do not use that fallback to submit an index trade.

Worked calculation: Bank Nifty futures price risk

The following is an invented Bank Nifty futures sizing example, not a current market quote or an order recommendation. Assume capital ₹3,00,000, risk budget 1%, entry at 50,000 and a planned stop at 49,900. Planned risk budget is ₹3,00,000 × 1 ÷ 100 = ₹3,000. The price distance is 100 points.

Using the verified 30-unit lot, planned price risk for a lot is 100 × 30 = ₹3,000 before costs. The budget therefore fits 1 whole lot, or 30 units, on this stop-distance arithmetic. An assumed position of 2 lots would risk ₹6,000 at the same execution distance.

Running these example inputs through the current form instead returns Units 30, Lots 0 and Risk Amount ₹3,000. That combination comes from its cash-unit fallback using the wrong lot multiplier. It is not a valid statement that Bank Nifty has no tradable lot fitting the example budget. The correct Bank Nifty calculation above is separate from the faulty Lots card.

The planned stop can execute at a different price in a fast market. Charges also add to the result. Any allowance for costs or worse execution is separate from this arithmetic; check current broker requirements independently. No stop-distance formula turns the planned loss into an assured maximum.

Premium paid, futures value and margin are different amounts

For a separate fictional option example, assume a Bank Nifty option premium of ₹200 per unit. Buying a 30-unit lot would involve ₹200 × 30 = ₹6,000 of premium before costs. This is the premium amount, not the total value of a futures contract and not a quote for option-seller margin.

For the fictional futures entry at 50,000, the reference contract value is 50,000 × 30 = ₹15,00,000. The broker's required margin is a separate figure. This page does not state a universal margin percentage or minimum cash requirement for opening the position. A fixed margin percentage cannot substitute for the current requirement for your actual position.

For options, an underlying-index stop distance is also different from the option-premium change. An assumed underlying move of 100 points does not imply that an option premium changes by ₹100. If sizing a premium-based stop, use premium entry and premium stop consistently, with the correct contract quantity. The options profit calculator addresses payoff arithmetic separately.

Cost of one Bank Nifty option lot

The money needed to buy one option lot is the premium per unit times the units in the lot. The premiums below are made-up examples to show the arithmetic, not quotes. A real premium depends on the strike, time left and implied volatility, so read it from your broker's option chain.

That is what a buyer pays up front. A seller of the same option receives the premium but must keep margin, which is a different and usually much larger amount. Buying also costs brokerage, STT on exercise in some cases, exchange charges and GST, which the brokers charges pages explain. See the 2026 STT change for rates.

Margin for one Bank Nifty futures lot

Futures margin is not a fixed number. The clearing corporation sets SPAN margin, which is calculated from how much a position could lose in a stressed move, and exposure margin on top of it. Both change when volatility or the index level changes, so a figure quoted on a website last month may be wrong today.

This page does not give a margin figure. To find the current one, open your broker's margin calculator, select Bank Nifty futures for the expiry you want, enter one lot and read the total. Margin is money held against the position. It is not a cost, and it does not cap your loss. Read the guides on SPAN margin and exposure margin for the parts.

The futures margin calculator on this site works from inputs you give it. Check what it asks for and confirm the result with your broker before you trade.

Does Bank Nifty have weekly expiry?

Bank Nifty contracts have monthly expiry only, plus quarterly contracts. There are no weekly Bank Nifty contracts at present. Nifty 50 is the index with a weekly expiry, on Tuesdays since 1 September 2025. The lot size is a property of the underlying index and applies to its futures and options alike, whichever expiry you pick. If a holiday moves an expiry, the lot size does not change. See the F&O lot size and expiry calendar for dates.

What "0.30 lot" means, and why NSE has no fractional lots

Many people search for "0.30 lot size in rupees". A lot of 0.30 comes from forex and CFD platforms, where lots can be split into hundredths. NSE index derivatives do not work that way. One Bank Nifty lot is 30 units, and the smallest order is one whole lot. You cannot buy 0.3 of a lot. The two use the word lot for different things, so a forex lot calculation does not carry over. For currency pairs, use the forex position size calculator instead.

The "30" in the Bank Nifty lot size is also easy to confuse with "0.30". They are unrelated. If your account cannot afford the risk of one whole lot at your stop distance, the honest answer is that the contract is too large for that plan, not that a smaller lot exists. See how to calculate position size.

A practical quantity check before reviewing a trade

• Read the exact symbol and expiry from the contract you intend to use.
• Check its applicable lot quantity in the exchange file or contract details.
• Multiply that quantity by your chosen whole number of lots.
• Keep the assumed stop loss, premium paid and margin requirement in separate notes.
• After closing, record actual execution and charges rather than just the planned result.

The post-trade review template helps compare a planned quantity with the actual trade. For derivatives, enter the underlying units when a calculation multiplies a per-unit price difference by quantity. Entering the lot count alone can understate the money result.

Bank Nifty lot size questions

Sources

• NSE: Market lots by contract month, checked 15 October 2026.
• NSE: NSE/FAOP/70616: Revision in Market Lot of Derivative Contracts on Indices, checked 15 October 2026.
• NSE: Nifty Bank F&O contract specifications, checked 15 October 2026.