Stock Market & Trading Calculators
Every trade-cost, margin and options tool an Indian trader needs — in one place.
Updated June 2026 · Free · No sign-up
Trading in Indian markets means more than picking the right stock — every order carries brokerage, STT, exchange transaction charges, the SEBI turnover fee, stamp duty and 18% GST, and F&O positions also block SPAN plus exposure margin. This cluster of calculators works out those numbers for you, so you know your true break-even before you place an order. The Brokerage calculator itemises cost per trade across equity intraday, delivery, futures and options, while the SPAN Margin calculator shows the margin required per lot for MIS and NRML positions.
Beyond costs, these tools help you size positions and read the tape. The Option Pricing calculator returns a theoretical Black-Scholes price along with Delta, Gamma, Theta, Vega and Rho; the Stock Average calculator recomputes your average buy price and break-even after you average down; the IPO Return calculator estimates allotment and listing-day gains; and the Pivot Points calculator generates intraday support and resistance using Classic, Camarilla, Woodie and DeMark methods. Together they cover the full workflow from pre-trade planning to intraday execution on the NSE and BSE.
All Stock Market & Trading Calculators
Brokerage Calculator
Calculate total cost per trade across equity intraday, equity delivery, equity F&O futures, equity F&O options, currency futures, currency options, and commodity futures. Includes brokerage, STT, exchange transaction charges, SEBI fee, stamp duty, and 18% GST.
SPAN Margin (F&O) Calculator
Calculate SPAN + Exposure margin required to trade F&O positions — futures, options buy/sell, MIS (intraday) vs NRML (overnight). Shows margin per lot, full-account margin utilization, and approximate buying-power leverage.
Option Pricing Calculator
Compute theoretical Call / Put option price using the Black-Scholes-Merton model. Returns Greeks (Delta, Gamma, Theta, Vega, Rho) so you can evaluate options strategies before placing the trade.
Stock Average Calculator
Recompute the average buy price after additional purchases (dollar-cost averaging or averaging down on a loss). Shows total invested, new average, break-even price required to recover, and percent change from original entry.
IPO Return Calculator
Calculate IPO allotment profit, listing-day gain, and post-listing % return. Accounts for application size in lots, oversubscription-driven allotment ratio, lot size, issue price, and listing price.
Pivot Points Calculator
Calculate intraday Pivot Points + Support / Resistance levels using all 4 methods — Classic (Standard), Camarilla, Woodie, and DeMark. Used by intraday traders for entry/exit triggers and stop-loss placement.
Frequently asked questions
What charges apply when I buy or sell shares in India?
Every trade attracts brokerage (zero for many discount brokers on delivery), Securities Transaction Tax (STT), an exchange transaction charge, the SEBI turnover fee, stamp duty and 18% GST on brokerage plus transaction charges. STT and stamp-duty rates differ by segment — for example STT is charged on both legs for intraday and futures but only on the sell side for options. The Brokerage calculator applies the correct rate for the segment you choose.
What is SPAN margin and why do I need exposure margin too?
SPAN (Standard Portfolio Analysis of Risk) margin is the exchange-mandated worst-case risk margin for an F&O position, and exposure margin is an additional buffer levied on top of it. Brokers must collect SPAN plus exposure upfront for futures and short options. The SPAN Margin calculator shows the total per lot and how much of your account it would use for MIS (intraday) versus NRML (overnight) positions.
How is an option's theoretical price and its Greeks calculated?
The Option Pricing calculator uses the Black-Scholes-Merton model, which takes the spot price, strike, time to expiry, risk-free rate and implied volatility to value European-style Call and Put options. It also returns the Greeks — Delta, Gamma, Theta, Vega and Rho — which measure sensitivity to price, time and volatility. These help you judge how a position will behave before you trade it.
How is profit on an IPO allotment calculated?
IPO profit is the difference between the listing price and the issue price, multiplied by the number of shares allotted, where shares come in fixed lots. In a heavily oversubscribed retail issue, allotment is by lottery so you may receive only one lot or none at all. The IPO Return calculator factors in your application size, the lot size, the oversubscription-driven allotment ratio and the listing price to estimate your gain.
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