Calculators: do the sum, see the assumptions.
14 calculators for charges, risk, options, returns, tax and settlement dates. Each one shows its inputs, units, limits and sources.
Calculators by task
14
Contract Note Decoder
What every line on your broker's note actually is. Who takes the money.
Open calculator CostsTrade Cost Calculator
What a trade actually costs after charges. Where the price turns even.
Open calculator CostsUS Stocks Charges (Zerodha · Groww)
Brokerage, US fees, exchange rate and TCS on a US stock trade, in dollars and rupees.
Open calculator RiskBreak-Even Frequency Calculator
How often you have to be right just to finish level. It uses your own bracket and charges.
Open calculator RiskPosition Size Calculator
How many shares your own capital, risk-per-trade and stop distance work out to.
Open calculator OptionsOptions Breakeven & Charges Calculator
Where an index option position breaks even once every charge is counted in.
Open calculator ReturnsCAGR & XIRR Calculator
The annualised return on a lump sum. A series of dated cashflows works too.
Open calculator ReturnsEMI & Loan Schedule Calculator
The monthly instalment, the total interest, and what a prepayment actually saves.
Open calculator ReturnsFD, RD & PPF Calculator
What each of the three common deposits matures to. What tax leaves behind.
Open calculator ReturnsSIP & Step-up SIP Calculator
What a monthly investment is worth once tax on the gain is paid. The figure is in today's money.
Open calculator ReturnsStock Average Calculator
Your average across several buys. It also shows the price that leaves you level.
Open calculator TaxCapital Gains Tax Calculator
What the tax comes to on shares you sold, short term or long term.
Open calculator TaxF&O Turnover & Tax Audit Calculator
Your derivatives turnover, and whether it crosses the tax-audit limit.
Open calculator ReferenceT+1 Settlement Date Calculator
Which calendar day a cash-market trade indicatively settles on.
Open calculatorWhat are you trying to work out?
Pick the question. The calculator opens with a worked starting example you can overwrite.
Trading cost & risk
Dates, tax & reporting
Saving, investing & borrowing
Live status & reference
3Published facts you look up rather than calculate. Each one quotes the circular or schedule it came from.
Is the Market Open Today?
Most usedWhether NSE is trading right now — and if not, when it next opens.
A live IST answer for NSE equity and F&O. You also get today's session timings and the next trading day.
OpenNSE & BSE Index Lot Sizes
Most usedHow many units one index contract carries, and the circular that says so.
NIFTY, BANKNIFTY, FINNIFTY, MIDCPNIFTY, NIFTYNXT50 and SENSEX contract sizes, each with its circular.
OpenNSE Market & Clearing Calendar
Which days the exchange is shut this year, and which sessions are special.
2026 trading holidays, special sessions and settlement notes for the NSE cash market.
OpenMarket X-Ray
Change an input and see how the answer changes.
Learning & reference reading
3Longer-form material for when the number is not the thing you are missing.
NISM Certifications
Which NISM exam applies to which market activity. Which ones do not apply to you.
Which exam applies to which activity, and the calculator behind each examinable formula.
OpenNISM Series VIII: Equity Derivatives
What the equity-derivatives exam covers, unit by unit, and how it is scored.
The published syllabus and exam format. Each unit has a calculator that puts a number on it.
OpenStock Market Glossary
What a market term means — and what it does not tell you.
Plain-English definitions of NSE and F&O terms. Each one says what it does not tell you.
OpenThe ordered learning tracks
Read the market mechanism behind each input. Follow a track so each idea is clear before the next one uses it.
Start the first track