股票平均成本计算器
将同一只股票的每笔买入合并为一个加权平均成本，并按任意现价查看未实现盈亏。
股份每股价格
$
$
- 每股平均成本
- $132.00
- 总股数
- 25
- 总成本
- $3,300.00
计算方式
average cost = sum(shares x price) / sum(shares)
- shares x price
- the amount spent on one purchase
- sum(shares)
- every share held, not the number of purchases
算例
Buying 10 shares at $150 ($1,500) and 15 at $120 ($1,800) is $3,300 across 25 shares, so the average cost is $132.00 — not $135.00, which is what averaging the two prices would wrongly give.
常见问题
- How do I calculate my average cost per share?
- Divide the total amount spent by the total number of shares. Add up (shares x price) for every purchase, then divide by the sum of the shares — not by the number of purchases.
- What is averaging down?
- Buying more of a holding at a lower price than you paid, which reduces your blended cost per share. It lowers your break-even price but also increases the amount committed to a position that has fallen.
- Does my broker calculate this the same way?
- Brokers generally report an average cost, but tax reporting may use specific-lot identification instead, which can produce a different gain or loss. Your broker’s records are the ones that count at tax time.
其他免费工具
本工具仅对您输入的数字进行计算。它仅供信息和教育用途，不构成投资、税务或财务建议，也不是买入、卖出或持有任何证券的推荐。测算是假设，而非预测。请务必自行尽职调查。