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Stock average calculator

Compute your average share price after buying at two different prices.

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Enter Shares — buy 1, Price — buy 1, Shares — buy 2, Price — buy 2 and the Stock average calculator works out Average price, Total shares, Total cost straight away. For instance, with Shares — buy 1 = 10, Price — buy 1 = $100.00, Shares — buy 2 = 20 and Price — buy 2 = $80.00 it returns Average price = $86.67, Total shares = 30 and Total cost = $2,600.00.

How to use it

  1. Enter your values: Shares — buy 1, Price — buy 1, Shares — buy 2, Price — buy 2.
  2. Read the result instantly: Average price, Total shares, Total cost.
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Frequently asked questions

What does the Stock average calculator actually compute?

It takes Shares — buy 1, Price — buy 1, Shares — buy 2 and Price — buy 2 and derives Average price, Total shares and Total cost from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

4 values: Shares — buy 1, Price — buy 1 ($), Shares — buy 2 and Price — buy 2 ($). Nothing else is required — no account, no file upload.

Can you show a worked example?

With Shares — buy 1 = 10, Price — buy 1 = $100.00, Shares — buy 2 = 20 and Price — buy 2 = $80.00, the calculator returns Average price = $86.67, Total shares = 30 and Total cost = $2,600.00. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

What happens if I enter larger values?

It moves a lot. Using Shares — buy 1 = 20, Price — buy 1 = $200.00, Shares — buy 2 = 40 and Price — buy 2 = $160.00 instead, Average price goes from $86.67 to $173.33 — which is why it is worth testing a few scenarios rather than trusting a single figure.

What does it give for smaller values?

Scaled down to Shares — buy 1 = 5, Price — buy 1 = $50.00, Shares — buy 2 = 10 and Price — buy 2 = $40.00, Average price comes out at $43.33. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Comparing two investments that pay at different times, deciding whether a project clears its cost of capital, and sanity-checking a valuation someone else produced.

What is the most common mistake?

Trusting a valuation without asking what share of it comes from the terminal value. Past 70%, the answer is an assumption about the distant future dressed up as a calculation.

How accurate is it, and what are the limits?

Estimate only — not financial advice.

What is the difference between the Stock average calculator and the Break-even price calculator?

This one returns Average price and Total shares; the Break-even price calculator returns Break-even sell price and Minimum gain needed. That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Crypto DCA calculator is the closest one after this: Dollar-cost averaging: enter your fixed buy amount and the prices you bought at, and get coins accumulated, true average cost, current value and profit/loss. Break-even is your average cost — you are ahead the moment price passes it.

Further reading

All guides →
ExplainerAveraging Down Halves the Loss and Doubles the PositionTen shares at 100 plus twenty at 80 gives an average of 86.67. Buy forty at 50 instead and it falls to 60 — but the money at risk goes from 2,600 to 3,000.ExplainerA One-Per-Cent Fee on Each Side Is Not a Two-Per-Cent ProblemBuy and sell fees of 0.5 % each need a 1.005 % gain to break even. Triple them to 1.5 % and you need 3.046 % — more than triple, because the two fees multiply rather than add.ExplainerTwo Accepted Models, Two Points Apart on the Same CompanyCAPM and the dividend growth model both compute the cost of equity. On one set of inputs they give 9 % and 7 % — and the choice between them decides a valuation more than any figure inside either.ExplainerWhat Is Slippage in Crypto? Price Impact, Tolerance and What It CostsPrice impact is arithmetic: on a constant-product pool it equals your trade size divided by the reserve plus your trade. Here is the formula, a table of trade size against impact, and why the setting called slippage tolerance changes none of it.ExplainerOne Point of Discount Rate Moves a Perpetuity by a QuarterA payment of 1,000 a year is worth 20,000 at a 5 % discount rate and 25,000 at 4 %. The formula is a single division, and that is exactly why the input matters more than the arithmetic.GuideWhere to Set a Stop-Loss and a Take-ProfitThe stop goes where your idea is wrong, not where your comfort runs out — and then the position size adapts to it. Here is the volatility argument, the sizing arithmetic, and the win rate each reward multiple demands.
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