What does this target average price calculator do?

It calculates how many shares Z you need to buy at price Y so that your overall average cost moves from your current average price to your target average price X.

Why do some buy prices return no solution?

To move your average cost down, the new buy price must be below the target average price. To move your average cost up, the new buy price must be above the target average price.

How are the batch scenarios generated?

The tool automatically builds a valid price range around your specified buy price and target price, then calculates multiple Y/Z scenarios without asking for extra inputs.

Target Average Price Calculator

Use only four inputs: current average price, current shares, target average price X, and buy price Y. The calculator will tell you how many shares Z to buy and automatically generate a batch scenario table around your specified buy price.

Enter Your Position

No manual scenario range is required. The tool derives a valid set of alternative buy prices automatically and builds the Y/Z table for you.

Current Average Price

Your current average cost per share.

Current Shares

How many shares you already hold.

Target Average Price X

The average price you want to reach after the new buy.

Specified Buy Price Y

The price you plan to buy at for the main scenario.

Core Formula

Let your current average price be C, current shares be Q, target average price be T, and your new buy price be Y. The required shares Z are:

Z = Q × (C - T) / (T - Y)

To move your average cost down, you need Y < T < C. To move your average cost up, you need Y > T > C. If the new buy price is on the wrong side of the target, there is no finite solution.

What You Get

Main Y/Z Result The first result shows the shares you need to buy at your specified buy price Y.

Auto Scenario Table The page also generates multiple alternative buy prices and calculates Y/Z pairs automatically.

Whole-Share Fallback You will see both exact shares and the minimum whole-share count that clears the target.

Typical Use Case

If your current average price is 5000 and you hold 100 shares, you can test what happens if you want to move the average to 4500 and buy more at 4200, 4000, or 3800. The table shows how the required share count changes as price changes.

SEO Notes

This page is fully indexable, internally linked, and included in the sitemap. The content is written as a standalone finance tool page rather than just a bare form.

How It Works

This page is intentionally simple: only four inputs. Everything else is derived automatically so you can get from “I want my average cost to become X” to “I need to buy Z shares at Y” with minimal friction.

1. Downward Repricing

If your target average price is lower than your current average price, the new buy price must be below the target. The lower the new buy price, the fewer shares you need to buy to reach the same target.

2. Upward Repricing

If your target average price is higher than your current average price, the new buy price must be above the target. This is less common, but the same formula works for adding at higher prices.

3. Exact vs Whole Shares

The formula may return a fractional share count. The tool also shows the minimum whole-share count by rounding up, which is often the practical number if your broker or asset does not support fractional shares.

FAQ: What if my current average already equals my target?

Your position is already at the target average price. Buying above or below that level will move the average away from the current target.

FAQ: Why does the share requirement explode near the target?

Because the denominator (T - Y) becomes very small. If the new buy price gets very close to the target average price, you need a much larger number of shares to pull the total average exactly to the target.

FAQ: Is this trading advice?

No. This page only performs arithmetic on cost basis and share count. It does not tell you whether the target is sensible or whether the asset is worth buying.