Equity Investing
Stock Average Calculator
Calculate your average buy price across multiple stock purchases and see your unrealised P&L at the current market price. Averaging down is a common strategy among Indian retail investors — but it only makes sense for fundamentally strong stocks where the fall is market-driven, not company-specific.
Formula: Average price = Total invested ÷ Total shares. Add as many purchase lots as you need, enter the current market price, and instantly see your break-even price, total investment, and profit or loss percentage.
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What is stock averaging?
Stock averaging (cost averaging) means buying additional shares when the price falls, reducing your average cost per share. If you bought 10 shares at ₹100 and 10 more at ₹80, your average cost is ₹90 — and you break even when the stock recovers to ₹90, not the original ₹100.
Formula: Average price = Total amount invested ÷ Total shares purchased.
⚠ Averaging down increases concentration risk. Only average into stocks where the business fundamentals are intact and the fall is market-driven — not a sign of company deterioration.
Frequently Asked Questions
Should I average down on a falling stock?▼
Only if: (1) the company's fundamentals are strong, (2) the fall is due to broader market conditions, not company-specific bad news, and (3) the position doesn't already exceed your portfolio risk limit. Never average down to 'get back to even' on a fundamentally broken business.
What is the average down calculator formula?▼
Average price = (Quantity1 × Price1 + Quantity2 × Price2 + ...) ÷ (Quantity1 + Quantity2 + ...). Example: 100 shares at ₹500 + 200 shares at ₹350 = ₹50,000 + ₹70,000 = ₹1,20,000 ÷ 300 shares = ₹400 average.
What is dollar-cost averaging (DCA)?▼
DCA is investing a fixed amount at regular intervals regardless of price — similar to SIP for stocks. Instead of timing the market, you average your purchase price over time. This removes emotional decision-making and typically outperforms lump-sum investing in volatile markets.
How is unrealised P&L calculated?▼
Unrealised P&L = (Current price − Average price) × Quantity. It is 'unrealised' because you haven't sold. Once you sell, it becomes realised P&L, which triggers tax liability: STCG (15% for equity held <1 year) or LTCG (12.5% above ₹1.25L for equity held >1 year in India from FY 2024-25).
What is the break-even price after averaging down?▼
Break-even price = your average cost per share. If your average is ₹400 and you're currently at ₹380, you need the stock to rise 5.3% to break even. Our calculator shows this directly as the 'Average Price' in the results.
Cost Averaging: Strategy and When It Makes Sense
Cost averaging (or dollar/rupee cost averaging) involves buying more shares of a stock when the price falls, which lowers your average purchase price. The formula for weighted average cost is:
Example: You buy 100 shares at ₹500 (₹50,000 invested). The stock falls to ₹400 and you buy 100 more (₹40,000 invested). Your average cost is now ₹90,000 ÷ 200 shares = ₹450/share, not ₹500. The stock only needs to recover to ₹450 for you to break even — not ₹500.
When averaging down makes sense:
- The fall is due to broad market conditions (index fell), not company-specific bad news
- You have thoroughly researched the company and its fundamentals remain intact
- The position size after averaging stays within your risk limits (no more than 5–10% of portfolio in one stock)
- You have a long enough horizon to wait for the recovery (3–5 years minimum)
When averaging down is dangerous: the company has fundamental problems (falling revenue, rising debt, promoter selling), you're averaging to avoid realising a loss psychologically, or the position is already too large in your portfolio. Averaging into a permanently impaired stock is called "catching a falling knife."
For educational purposes only. This is not investment advice. Equity investments carry market risk. Consult a SEBI-registered investment advisor before making investment decisions. Last reviewed: October 2025.