Risk per stock · free, no sign-up
Position size calculator: how many shares keep your loss limited?
Decide the loss you can accept first, then let the stop-loss decide the share count. A company-size cap stops any one stock from quietly taking over your portfolio.
Change the inputs
Position-size / risk
Combines your rupee risk with a company-size cap: Large 5-10%, Mid 4-7%, Small 3-5%.
Transparent formulas. Estimates are education, not promises or insurance advice.
Your result
₹The final cap respects both your ₹10,000 loss budget and the 10% maximum for a Large Cap company.
Save it in RupaylogyHow this calculator works
- Risk budget = portfolio value × the percentage you are willing to lose on one idea.
- Shares by risk = risk budget ÷ (entry price − stop-loss price).
- A company-size band then caps the position: 5–10% of the portfolio for a large cap, 4–7% for a mid cap and 3–5% for a small cap. The smaller of the two limits wins.
A worked example
With a ₹10 lakh portfolio and 1% risk, the risk budget is ₹10,000. Buying at ₹500 with a stop at ₹475 risks ₹25 a share, so risk alone allows 400 shares, which is ₹2 lakh or 20% of the portfolio. The large-cap band caps that position well below 20%.
Questions people ask
Is this a trading tip?
No. It does not suggest what to buy. It only sizes a position you have already decided on, so one mistake cannot hurt the whole portfolio.
Why cap small caps more tightly?
Smaller companies can move much more, and gap past a stop-loss more often. A smaller cap keeps that extra risk in proportion.
Related free tools
EMI calculator
Work out your monthly EMI, total interest and a year-wise repayment schedule for a home, car or personal loan. Free, instant, no sign-up.
Open calculator →Goal SIP calculator
Enter a goal amount, what you have already invested and the years left. Get the monthly SIP needed to close the gap. Free, no sign-up.
Open calculator →FIRE calculator
Turn your monthly expenses into a FIRE number and an estimated age when work could become optional. Adjusted for inflation. Free, no sign-up.
Open calculator →Seven Pillars Wealth Check
Score your emergency fund, insurance, funds, FDs, gold and property in two minutes.
Check my money →