Easy Options Calculator
Free · Live stock quotes · No account
See the profit before you trade
Type a ticker, pick a strategy, and read the exact breakeven, max loss, Greeks and probability — with every number labelled by where it came from.
1
Pick a strategy
Start from a ready-made position or build your own legs.
2
Enter a ticker
Live stock price fills in automatically. Edit anything you like.
3
Read the chart
Exact breakeven, max loss, Greeks and probability — all labelled.
Start with a common strategy
Each one opens with a working position already filled in. Change whatever you like.
What makes this one different
- One engine, every strategy
- A long call and an eight-leg custom position go through exactly the same solver. Fixing the maths fixes every strategy at once, and no strategy gets a special case that quietly disagrees with the others.
- Unlimited stays unlimited
- When a position has no cap on its loss, we say so in words. Maximum risk is never rendered as a large number that happens to be where the chart stopped.
- Every number is labelled
- Each figure carries a badge saying whether you typed it, a market feed supplied it, or a model produced it. You always know which parts of a result are measurement and which are assumption.
- The formulas are published
- Black-Scholes-Merton with a continuous dividend yield, a Cox-Ross-Rubinstein lattice for American-style early exercise, and Newton-Raphson with a bisection fallback for implied volatility. All of it written down, all of it tested against independent reference values.
Common questions
- Is the options calculator free?
- Yes. Every calculator, the payoff chart, the profit table, the Greeks and the probability estimates are free, with no account required.
- How is breakeven calculated?
- The expiration payoff of any options position is piecewise-linear, with a bend at every strike. We evaluate the payoff at every strike, find the segments where it crosses zero, and solve those crossings exactly by linear interpolation. There is no root-finding error, and multi-leg strategies with two or more breakevens report all of them.
- Which pricing model do you use?
- Black-Scholes-Merton with a continuous dividend yield for European-style contracts, and a Cox-Ross-Rubinstein binomial lattice when early exercise matters, since US equity options are American-style. Expiration values are pure arithmetic and use no model at all.
- Does it use live market prices?
- Yes for the underlying stock. Enter a ticker and the current stock price fills from a live market feed (with a Market badge). Option premiums can still be typed by hand or priced by the model, and model figures are labelled so they are never mistaken for quotes.
- Does probability of profit account for the real distribution of returns?
- No, and we say so beside every probability. The estimates assume a lognormal terminal price, the same assumption Black-Scholes makes. Real returns have fatter tails, so treat these as a common yardstick rather than a forecast.