Seven calculators I built because I needed them and kept getting the arithmetic wrong in my head. They run in your browser, make no network request, and there is no signup.
Profit and loss at expiry for calls, puts, spreads, covered calls and iron condors, with the payoff drawn out.
Tick values, profit and loss, and position size for 25 CME contracts, including eight micros.
Dividend reinvestment against taking the cash, year by year, with an income target.
Average cost across every buy, and what it takes to pull the average down to a number you can live with.
The price your broker calls you at, how far away it is, and what it costs to make the call go away.
Everything you own minus everything you owe, three ways: headline, liquid, and the SEC’s accredited-investor version.
What a Roth grows to by retirement, and what it cost if you opened one, kept contributing, and never actually bought anything.
No account, no email, nothing gated. There are no affiliate links on this page and no broker or prop firm deals behind any of them. If that ever changes I will say so here first.
All seven are calculators, not advice. Verify contract specifications and margin requirements with your broker before you trade, and remember that a probability or a projection is a model output rather than a measurement.
