Position 400 at 8.25, target 8.00
- Input
- compra a 7
- Expected output
- 100
(3,200 − 3,300) ÷ (7 − 8); final average 8.00.
Carregando ferramenta… / Loading tool…
stock average down calculator
Fill in your position in the rows above and scroll to the planner. Under Reach a target, type the average you want and the buy price; the result gives the quantity and the order value.
(3,200 − 3,300) ÷ (7 − 8); final average 8.00.
(3,000 − 3,300) ÷ (6 − 7.5); final average 7.50.
(3,200 − 3,300 − 10) ÷ (7 − 8).
The exact math gives 54.55; it rounds up to 55.
(4,000 − 5,000) ÷ (30 − 40).
(3,600 − 3,300) ÷ (10 − 9).
Add up what you paid in each purchase (quantity × price + fees) and divide by the total quantity. With 100 shares at 15 and 300 at 20, the cost is 1,500 + 6,000 = 7,500 for 400 shares, so the average is 18.75.
The tool only does the math and recommends nothing. Buying more of an asset that has fallen increases exposure to it, and a lower average does not guarantee the price will recover.
Because shares are bought in whole quantities. The planner rounds up, which guarantees reaching the target, and the final average ends a little below it.
Then no quantity at that price takes the average down to the target, and the tool says so. Purchases above the target can only push the average up.
After 4 trades
Position 100 · average cost R$10.00
Position 300 · average cost R$9.50
Position 800 · average cost R$8.25
Position 400 · average cost R$8.25 · result +R$1,000.00
Buy 100 at R$7.00 each
Amount invested in the order, fee included: R$700.00
You would hold 500 at an average cost of R$8.00
Brokerage and exchange fees are added to the buy cost and deducted from the sale value, as in the Brazilian tax agency example. Enter the total order fee as an amount of money.
This is not investment advice or an income tax calculation. Your data stays in your browser.