Stock Average Calculator
Bought twice at different prices? Know your real average. Free, private, no signup.
Your purchases
Your average buy price
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Total shares-
Total invested-
Profit / loss at CMP-
Averaging down: powerful, dangerous
Buying more at a lower price pulls your average cost down — 100 shares at ₹500 plus 150 at ₹400 = ₹440 average, not ₹450. You need only a recovery to ₹440 to break even, not ₹500.
- Average only quality. Averaging down a dying business is throwing good money after bad. The math works; the stock has to deserve it.
- It's not a lower price — it's a bigger bet. Your second buy here is 1.5× the first. Position sizing matters more than the average.
- Tax note: averaging doesn't change holding periods — each buy's date counts separately for LTCG/STCG.
FAQs
How is average price calculated?
Total money invested divided by total shares: (100×500 + 150×400) ÷ 250 = ₹440.
Should I average a falling stock?
Only if the investment thesis is intact. Falling price alone is not a reason to buy more — that's catching a falling knife.
Does bonus/split change my average?
Yes — multiply shares and divide price proportionally. A 1:1 bonus halves your average price and doubles share count; invested total stays the same.
Is my data sent anywhere?
No. Everything is computed in your browser; nothing leaves your device.
Disclaimer: Estimates for illustration, computed in your browser — no data leaves your device. Not investment advice.