Calculator
Stock average calculator
Bought the dip twice? Know your real breakeven.
Set shares to 0 to ignore a slot. Excludes brokerage, STT and taxes — add ~0.1% for delivery reality.
₹140
average buy price
- Total shares150
- Total cost₹21,000
Hover a segment for value + share.
Averaging down lowers your breakeven but doubles down on a loser — average only businesses you'd buy fresh today, in tranches, never on margin.
What this calculator answers
Buying 100 shares at ₹150 and 50 shares at ₹120 gives 150 shares at an average of ₹140 and a total cost of ₹21,000. Enter up to three tranches to see the average buy price after averaging down.
How it is calculated
Total cost is the sum of shares × price across the tranches you fill in, and the average is total cost ÷ total shares. A tranche with zero shares is ignored.
Brokerage, STT and taxes are excluded — adding roughly 0.1% for delivery charges would raise the effective average slightly.
Common questions
What does averaging down actually do?
It lowers the break-even price by buying more at a lower price, but it also increases your exposure to the same position. The average falls; the risk does not.
Why is the third tranche blank?
A tranche with zero shares is ignored, so you can use one, two or three buys. The breakdown bar shows how much of the total cost each tranche accounts for.
Does this include brokerage and taxes?
No — it is a pure weighted average of price and quantity. Add your delivery costs separately if you want an all-in break-even.
Source & freshness
- Source
- Deterministic formula in lib/calculators.ts
- Timeliness
- Static-verified
- Method
- calculated
- Note
- Illustrative projection from your inputs — not a market quote.