How to use it
Enter your entry price, your stop-loss price, and how many shares you hold. The calculator returns the total dollars you'd lose if the stop is hit, that loss as a percentage of the entry, the risk per share, and the position's value. It's the fastest way to sanity-check a trade before you take it.
The math
Per-share risk is simply |entry − stop|. Total loss is that times your share count,
and the percentage loss is the per-share risk divided by the entry price. A $100 entry with a $95
stop on 100 shares risks $5 × 100 = $500, a 5% move. All of it is computed with
exact decimal math so the figures are precise to the cent.
Stop first, size second
The most robust workflow is to decide where your stop belongs from the chart — the price that proves the trade wrong — and then choose your share count so the loss at that stop fits your risk budget. That's what the Position Size Calculator does; this tool is the quick check on the loss a given size actually carries.
TradeCaliper is a planning and education tool, not financial advice.