Average Stock Price Calculator 2026 — Averaging

The average purchase price is the total value of all purchases divided by the total number of shares: (qty₁ × price₁ + qty₂ × price₂) ÷ (qty₁ + qty₂). For example, 100 shares at PLN 50 and 100 at PLN 40 gives (5,000 + 4,000) ÷ 200 = PLN 45 per share.

Dollar Cost Averaging is a strategy of buying shares in several tranches at different prices instead of all at once. It smooths the impact of price swings and lowers the average purchase price when the price falls.

Averaging down means buying more shares at a price lower than the original, which lowers the average purchase price of the position. It carries risk — if the company loses value permanently, buying more increases the loss instead of limiting it.

The average must be weighted by the number of shares because the tranches differ in size. For 300 shares at PLN 50 and 100 at PLN 40, a simple average (PLN 45) would be wrong — the correct weighted average is (15,000 + 4,000) ÷ 400 = PLN 47.50.

The average purchase price sets the level above which the position is in profit. If the average is PLN 45, the share must cost more than PLN 45 (plus commissions and tax) for a sale to be profitable.

No. The calculator computes the pure average purchase price. Commissions raise the real acquisition cost and must be added separately — use the brokerage commission calculator, and the stock profit calculator for net profit.

Yes. When establishing income from selling shares bought in tranches, the rules use the FIFO (First In, First Out) method. The average price from the calculator helps assess the position, while PIT-38 settlement uses the FIFO cost.

Spreading purchases over time reduces the risk of committing all capital at the price peak. The average purchase price moves closer to the average market price over the buying period, limiting the impact of poor timing.

This calculator handles two tranches. For more transactions, average in steps: average the first two tranches, then treat the resulting position (sum of shares and value) as the first purchase in the next averaging step.

No. It is an informational tool that helps calculate the average acquisition cost. It is not investment advice or a recommendation. Make decisions after a risk analysis, ideally with a licensed adviser.