TrueTool
Average Down Calculator
Work out your new average cost and breakeven price when you buy more of a stock or crypto after a drop. Enter your current position and the fresh capital you plan to deploy, and this free average down calculator builds a staged buy plan that shows exactly how each purchase lowers your cost basis. It works for stocks, ETFs and cryptocurrencies alike — and, like every TrueTool, it runs entirely in your browser: no signup, no upload, no price API.
Set parameters and click "Generate Buy Plan"
The calculator will work out your optimal averaging-down strategy.
What Is Averaging Down?
Averaging down means buying more of an asset after its price falls, so your average cost per unit drops. If you own a stock or coin at an average price of $60 and it trades at $40, adding to your position at $40 pulls your average cost somewhere between the two. The goal is not to catch the exact bottom — it is to lower your breakeven price, so a smaller rebound is enough to get the position back into profit.
Averaging down is the opposite of cutting losses: instead of selling a position that has weakened, you add to it — on a plan decided in advance rather than in the heat of the moment. That plan is what this calculator produces: staged buy orders at set price drops, with the new average cost shown after every step.
How to Calculate Your New Average Cost
The math is simple weighted averaging — the same formula on every exchange and broker statement:
Equivalently, in per-share terms: (shares held × old average + new shares × new price) ÷ total shares. Two worked examples show how much the breakeven can move.
- Current position: 100 shares × $50 average = $5,000 invested.
- Add 50 shares at $40 = $2,000 more invested.
- New average = ($5,000 + $2,000) ÷ (100 + 50) = $7,000 ÷ 150 = $46.67.
- Breakeven falls from $50 to $46.67 — the stock now needs to rise about 16.7% from $40 instead of 25%.
- Current position: 0.5 BTC × $60,000 average = $30,000 invested.
- Add 0.25 BTC at $40,000 = $10,000 more invested.
- New holding = 0.75 BTC; total invested = $40,000; new average = $40,000 ÷ 0.75 = $53,333.
- Breakeven now sits about 33% above the $40,000 market price, instead of the 50% gap it was before the buy.
The calculator above goes further than the single-buy formula: it builds a whole ladder of buys, spaced at fixed percentage drops, and shows your average cost and breakeven after each rung — so you can see where the plan starts to hurt if the price keeps falling.
Average Down Calculator for Stocks and Crypto
The same averaging-down math works everywhere, but the two markets feel very different. In stocks, a 10–20% drawdown is notable; in crypto, it is a normal Tuesday. Bitcoin and Ethereum have repeatedly fallen 70% or more from their highs and recovered, which is why averaging down is so common in crypto — and why a plan with a fixed budget and a limited number of buys matters so much there.
On the stock side, averaging down is the classic response to a market-wide selloff: adding to a broad index fund or a quality company you already own at a lower price. The risk profile changes if the fall is company-specific — a broken thesis does not get fixed by a lower cost basis. On the crypto side, the coin can halve again after you buy; this tool caps the damage by letting you set exactly how many buys the plan contains and how much cash it uses.
Averaging down is not a replacement for dollar cost averaging — the two are often combined. A steady DCA calculator plan builds the position on a schedule; averaging down is the tactical top-up when the market hands you a lower price. Use this page for the tactical side, and the DCA calculator for the schedule.
Frequently Asked Questions
What is an average down calculator?
An average down calculator works out your new average cost and breakeven price when you add to an existing position after a price drop. Enter what you already hold, your average cost, and the amount you plan to add — it returns your new cost basis, the breakeven price, and a scenario table showing profit at higher prices.
How do you calculate the average down price?
New average cost = total invested ÷ total units. If you invested $5,000 in 100 shares (a $50 average) and buy 50 more shares at $40 ($2,000), your new average is ($5,000 + $2,000) ÷ 150 = $46.67 per share. The calculator applies exactly this formula to every rung of your buy plan.
Is averaging down the same as dollar cost averaging?
No — they answer different questions. Dollar cost averaging invests a fixed amount on a fixed schedule no matter what the price does. Averaging down is reactive: you buy extra only after the price falls, targeting a lower cost basis on a position you already hold. Many investors do both — a scheduled DCA plan plus discretionary dip buys.
Does averaging down work for crypto?
Crypto's volatility makes deep drawdowns common, so averaging down can meaningfully cut your cost basis. It also means the price can keep falling after your first buy, which is why a staged plan — fixed drop intervals, a capped number of buys, a set cash budget — is safer than improvising. That is exactly how this calculator structures the plan.
When should I avoid averaging down?
When the drop reflects a broken thesis — fraud, a failed product, terminal decline — rather than a market-wide selloff. Averaging down into a dying asset just concentrates more money in a losing position. It works best when you have a fixed budget you can afford to lock up, the asset's long-term case is intact, and you can wait for a recovery.