Stock, ETF and crypto calculators
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Average cost after buying more
Compare purchase scenarios A/B and check average cost and investment amount.
Calculate average cost →How much did you gain or lose?
Compare profit/loss and return at two selling prices for the same purchase.
Calculate profit/loss and return →Dividends for your holdings
Compare estimated dividends for different quantities at the same dividend and tax rate.
Calculate dividends →Crypto average cost after buying more
Calculate average cost after additional crypto purchases, including Bitcoin. Supports up to eight decimal places.
Calculate crypto average cost →Growth with compounding
Enter an initial investment, monthly contribution and annual return to calculate the amount under a constant assumed return.
Calculate compound growth →Pick up where you left off
No need to enter the same numbers again
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View saved calculations →Check the dates too
From dividend dates to your amount
Check record and payment dates, then calculate dividends for your quantity.
View dividend calendar →Try an example first
As you invest more,
how does average cost change?
Adjust the amount to see how average cost changes. Open the example in the calculator and edit it for your own inputs.
This example uses fixed historical prices.
Not a current quote or a recommendation to buy.
Bought Samsung Electronics at a peak. What if you buy more?
Hypothetical example using historical prices · As of Sep 14, 2026
Samsung Electronics bought at a peak Average per share 380,000 KRW × 10 shares
Additional purchase at the Sep 14 price 1 share 248,500 KRW × 10 shares
Combined
Average cost per share
Total 20 shares
Total cost 6,285,000 KRW ÷ Total quantity 20 shares = Average cost
Excluding fees
A lower average cost does not erase losses.
Price source: Npay Securities · Sep 14 after-market close · 52-week high includes KRX + NXT · Not updated automatically
Try this example with your inputs →Enter your own values for stocks, ETFs and crypto. Korean stock search provides reference data for stocks with dividend records, not live prices.
About calculations and data
A reference tool using your inputs. Only entered fees and taxes are included; actual results may differ. Check dividend and stock data dates. No investment advice or trading recommendations are provided.