Stock Average Calculator

How to Use Stock Average Calculator

1. Add your purchases. Click “Add Purchase” to create rows. Enter the quantity and price per share for each buy transaction.
2. Remove any extra rows. Use the ✕ button to delete unwanted entries; at least one row is always required.
3. Click Calculate Average. The tool sums total shares and total investment, then divides to show your weighted average price.
4. Use Target Average mode. Switch the radio button, enter current holdings, current market price, and desired average. The tool computes exactly how many shares you need to buy to reach that target average cost.

Benefits of Stock Average Calculator

• Handles multiple buy orders in one go, accurately computing the weighted average instead of a simple mean.
• The target‑average mode removes trial‑and‑error — enter your goal and the calculator tells you the exact quantity to purchase.
• Validates that the target average lies between the current market price and your existing average, preventing unrealistic inputs.
• Instant, free, and private — your portfolio details never leave your browser.

Frequently Asked Questions

What is stock averaging down?

It means buying more shares of a stock at a lower price to reduce your overall average cost. The calculator shows the new average after such a purchase, so you can see if it’s worth doing.

How is the weighted average different from a simple average?

A simple average treats every purchase equally. A weighted average accounts for how many shares you bought at each price, giving a true cost per share that reflects your actual portfolio.

When should I use the target average mode?

Use it when you want to bring your average cost down to a specific level — for example, to set a psychological exit point or to match a price target. The tool checks that the target is mathematically achievable.

Is Stock Average Calculator free and private?

Yes — it is 100% free, needs no sign‑up, and everything runs in your browser; your data never leaves your device.