Trading Calculators
Free tools to help traders calculate position size, risk per trade, stop loss, targets, brokerage charges and potential returns before taking a trade.
01Risk management
Position Size Calculator
Works out how many shares/lots to buy so a stop-loss hit costs no more than the risk you decide in advance.
Your result
Updates as you type
How it works & formula
Maximum Risk Amount = Capital × (Risk % ÷ 100). Risk Per Unit = |Entry − Stop Loss|. Quantity is Maximum Risk Amount ÷ Risk Per Unit, rounded down to a whole share so you never risk more than planned. Position Value = Quantity × Entry Price.
For a Long trade the stop loss must sit below the entry price; for a Short trade it must sit above it — the calculator checks this so the direction and the stop make sense together.
02Risk management
Risk Per Trade Calculator
The simplest question in trading: in rupees, how much am I actually allowed to lose on this trade?
Your result
Updates as you type
How it works & formula
Maximum Risk Amount = Capital × (Risk % ÷ 100). Example: ₹1,00,000 capital at 1% risk = ₹1,000 maximum planned risk.
03Trade planning
Stop Loss Calculator
Works backwards from how much you're willing to risk to the exact price your stop loss should sit at.
Your result
Updates as you type
How it works & formula
Position Value = Entry × Quantity. Maximum Risk is either the rupee amount you enter, or Position Value × (Risk % ÷ 100). Risk Per Unit = Maximum Risk ÷ Quantity.
Long: Stop Loss = Entry − Risk Per Unit. Short: Stop Loss = Entry + Risk Per Unit. The "% of Position Value" mode is useful when you're thinking in terms of "I don't want to lose more than X% of what I've put into this trade" rather than a fixed rupee figure.
04Trade planning
Target & Risk/Reward Calculator
Turns your stop loss and a risk:reward ratio you're comfortable with into an actual target price.
Your result
Updates as you type
How it works & formula
Risk Per Unit = |Entry − Stop Loss|. Reward Per Unit = Risk Per Unit × Ratio. Long: Target = Entry + Reward Per Unit. Short: Target = Entry − Reward Per Unit.
05Costs
Brokerage & Charges Calculator
Breaks a trade down into brokerage, STT, exchange charges, SEBI charges, stamp duty and GST, so you see the real, after-cost profit or loss.
Your result
Updates as you type
How it works, formula & sources
Buy/Sell Value = Price × Quantity. Gross P&L = Sell Value − Buy Value. Each charge is calculated on buy and/or sell value as shown above, GST is 18% of (brokerage + exchange charges + SEBI charges) only, and Net P&L = Gross P&L − Total Charges.
Reference rates are modelled on a typical Indian discount broker's published charge structure as of April 2026 (after the Union Budget 2026 STT revision). Actual brokerage, and sometimes exchange charges, differ between brokers — always confirm your own broker's current rates before relying on this for a real decision.
06Trade review
Profit/Loss Calculator
The straightforward version: what did this trade actually make or lose, in rupees and in percent.
Your result
Updates as you type
How it works & formula
Entry/Exit Value = Price × Quantity. Long: Gross P&L = (Exit − Entry) × Quantity. Short: Gross P&L = (Entry − Exit) × Quantity. P&L % is calculated against Entry Value. Net figures simply subtract the charges you enter.
07Growth projection
Compounding Calculator
A mathematical projection of what a starting amount could become if a return repeats every period — nothing more than that.
Your result
Updates as you type
This is a mathematical projection based on the number you entered — it is not a guarantee, prediction, or promise of future returns. No trader can reliably achieve a fixed return every single period.
How it works & formula
Each period: Balance = Balance × (1 + Return % ÷ 100), then the contribution (if any) is added. With no contribution this is the standard compound-interest formula, Final Value = Starting Capital × (1 + r)ⁿ. Growth % is measured against everything put in (starting capital + contributions).
08Portfolio planning
Capital Allocation Calculator
A simple check on how your capital is spread across positions, so it doesn't creep past what you actually have.
Your result
Updates as you type
This allocates more than your total capital. Reduce the number of positions or the % per position.
How it works & formula
Capital Per Position = Total Capital × (Allocation % ÷ 100). Total Allocated = Capital Per Position × Number of Positions. Remaining = Total Capital − Total Allocated.
Frequently asked questions
What is a position size calculator?
A position size calculator works out how many shares or lots to trade so that if your stop loss is hit, the loss matches an amount you decided on in advance — instead of your position size being a guess.
How do I calculate risk per trade?
Multiply your trading capital by the percentage of it you are willing to risk on one trade. For example, ₹1,00,000 of capital at 1% risk means a maximum planned loss of ₹1,000 on that trade.
How is stop loss calculated?
Divide the amount you are willing to risk by your quantity to get the risk per unit. For a Long trade, subtract that from your entry price; for a Short trade, add it — that gives the stop loss price.
What is risk-reward ratio?
Risk-reward ratio compares how much you stand to lose if your stop loss is hit against how much you stand to gain if your target is hit. A ratio of 1:2 means the potential reward is twice the risk.
How is trading profit and loss calculated?
For a Long trade, profit/loss is (Exit Price − Entry Price) × Quantity. For a Short trade, it is (Entry Price − Exit Price) × Quantity. Subtracting brokerage and other charges gives the net figure.
Are brokerage and trading charges the same for every broker?
No. Brokerage is set individually by each broker and plan. Government charges such as STT, stamp duty and SEBI fees are uniform, but brokerage and, in some cases, exchange charges vary — always check your own broker's current rates.
Is the compounding calculator a guaranteed return calculator?
No. It is a mathematical projection based on the return percentage you enter, repeated for a number of periods. It does not predict or guarantee that any real return is achievable.
These calculators are provided for educational and informational purposes only. They use the inputs and assumptions provided by the user and should not be considered financial, investment or trading advice. Market conditions, broker charges, taxes and regulations may change. Verify applicable charges and rules with your broker or relevant official source before making financial decisions.