Trading maths, done for you
Free calculators for Indian traders and investors, each showing its working.
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What this site is, and is not
- Arithmetic, not advice The calculators work out what your own numbers mean: what a trade costs, what you risk, what you owe in tax. We never tell you what to buy or sell.
- No live prices You type the prices from your own broker, and the sums run in your browser.
- Checked rates Charges and tax rates come from NSE, SEBI, the Income Tax Department and brokers’ own pages, each with the date we checked it.
Start here
- Trading costs and riskWhat a trade costs, what you risk, the tax you owe, and the chart levels8 pages →
- Investing and SIPWhat a SIP or lumpsum grows to, withdrawals, goals and CAGR6 pages →
- IPOsListing gain, allotment chance, lot size, and the calendar of open issues4 pages →
- Savings and loansPPF, SSY, FD, RD, post office schemes and home loan EMI, with this quarter’s rates10 pages →
Today
- Is the market open today?NSE holidays, trading hours and Muhurat trading
- IPO calendarMainboard IPOs opening soon and open now: dates, price band, lot size
- Muhurat trading 2026Diwali session on 8 November, from NSE’s circulars
Every calculator
Trading costs and risk
Savings and loans
Learn
- Trading charges explainedEach charge on an Indian trade and who gets it: brokerage, STT (raised for F&O in April 2026), exchange fees, stamp duty, GST and DP, with an example.
- How F&O and intraday trading is taxedHow F&O, intraday and delivery trades are taxed for residents: business income, turnover, audit limits, losses, expenses, ITR-3 and the Income-tax Act 2025.
- Intraday vs delivery tradingHow intraday (MIS) and delivery (CNC) trades differ in India: margin and SEBI peak margin rules, auto square-off, T+1 settlement, charges and tax basics.
- What is a lot size?What a lot is in Indian futures and options, how contract value is calculated, why NSE sets and revises lot sizes, and what that means for your risk.
- F&O until 3:45 pm: NSE’s new market timings from 7 December 2026From 7 December 2026, F&O on NSE trades until 3:45 pm and the closing auction runs 3:30 to 3:40 pm. What changes, what stays the same, and why.
- Position sizing explainedHow fixed-fractional position sizing works: quantity = capital × risk% ÷ (entry − stop), with ₹ examples for shares and for F&O lots rounded down.