BasisPilot

BasisPilot's page title sums up the idea: investment calculators you can verify. Each of its free tools shows the formula, assumptions and limits next to the result, so you can check the math instead of trusting a number.

The homepage example makes the point. With a $10,000 account, a 1% risk limit, an entry at $50 and a stop at $47.50, the position size calculator returns 40 shares, $2,000 of capital and a $100 planned maximum loss. You can follow every step from risk budget to share count.

The DCA calculator projects recurring contributions and keeps the cash you put in separate from estimated growth, which makes it harder to mistake compounding for savings. The average cost calculator combines past purchases, or plans a new one, and gives you the break-even price. The position size calculator converts an account risk limit and stop price into a number of shares. The stop-loss calculator works the other way, turning a percentage, an ATR multiple or a risk budget into a stop price. The ETF overlap calculator compares funds by weighted overlap, shared holdings and unique exposure, though the homepage preview uses synthetic example ETFs rather than live fund data.

The navigation also lists a market scanner, stock research pages, an event calendar and sections on 13F institutional holdings and insider filings.

The calculators run in your browser. The site says inputs stay there and aren't sent to analytics, and you don't need an account. A methodology page lists the formula version and rounding rules, and the footer links editorial and corrections policies.

The footer is also clear that BasisPilot provides educational calculations, not personalized investment, tax or trading advice. That's the right framing. These tools help you check a plan's arithmetic. Whether the plan is a good idea is still your call.