Stock averaging
Average Down Calculator
Calculate your new weighted average after purchasing more shares at a different price.
Global calculator · Select the currency used for your inputs. No exchange-rate conversion is applied.
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Your results
Average Down Calculator formula
Existing cost and additional cost are combined, then divided by the new total number of shares. A larger purchase has a proportionally larger effect on the result.
How to interpret the result
A lower average changes the accounting break-even level but does not improve the company, reduce volatility or guarantee recovery.
Worked example
100 shares at 120 plus 50 shares at 90 produces an average price of 110.
How to use this calculator
- Enter values from the same transaction or scenario.
- Confirm that quantities, dates, rates and currency match the labels.
- Review the result and change one assumption at a time when comparing scenarios.
Common mistakes
- Averaging the two prices without considering quantities.
- Treating a lower average as lower investment risk.
- Leaving transaction charges out of the effective cost basis.
Limitations
The calculation covers two combined positions and does not assess valuation, company quality, liquidity or portfolio concentration.
Read the average share price guide →
This calculator is for general education and estimation only. It is not financial, tax, accounting, or investment advice.
Questions to check before relying on the result
What does this calculator include?
Calculate your new weighted average after purchasing more shares at a different price.
Which assumptions should I verify?
Check every entered amount, rate, date and charge against the transaction, official source or provider document relevant to you.
What can make the actual outcome different?
The calculation covers two combined positions and does not assess valuation, company quality, liquidity or portfolio concentration.
Does the selected currency convert my values?
No. Currency selection changes formatting only; it does not fetch or apply an exchange rate.