Dollar Cost Averaging Calculator
Buy the same amount every period and see the average price you actually end up paying.
Method
How it works
The calculator assumes the price moves in equal steps from the first purchase price to the last purchase price across the chosen number of periods. The same cash amount is invested at each simulated price.
Because a fixed amount buys more shares at lower prices and fewer at higher prices, the effective average cost differs from the simple average of the price path. With one period, the first purchase price is used.
Common questions
Frequently asked questions
Does this use real historical price movements?
No. It models an evenly spaced price path between the starting and ending prices you enter.
Why is average cost different from the simple average?
Equal cash purchases acquire different share quantities at different prices, creating a quantity-weighted effective cost.
What happens with one period?
The single purchase uses the starting price and the ending price is still used to value the accumulated shares.
Not financial advice. This calculator is for general informational purposes only. Check figures independently before making financial decisions.