Strike Price Calculator: Moneyness, Intrinsic Value, Breakeven, and ITM Odds
A strike price calculator helps you choose and evaluate an option strike, not invent one. You pick a level from the chain; the tool then shows its moneyness against the current stock price, the intrinsic value baked in, the breakeven, and a model estimate of the odds it finishes in the money. Say the stock trades at $100. A $105 call is out of the money, with a $107.05 breakeven once you add a $2.05 premium and roughly a one-in-three chance of paying off. For education, not financial advice.
Strike Price Calculator
Suggest an option strike price that matches your goal. Choose a target delta, a percent out of the money, or a target breakeven, and this tool finds the strike that best fits, then shows the resulting delta, moneyness, probability of finishing in the money, Black-Scholes premium, and breakeven. It also lists three nearby round strikes with their deltas so you can pick a real listed strike. Built for US equity options at 100 shares per contract.
Recommended tools and brokers
A strike price is something you select from the strikes your broker lists for a symbol, not a number that is truly calculated. This tool suggests the strike that best matches your delta, percent-out-of-the-money, or breakeven goal, then you pick the nearest listed strike. The suggested strike, delta, premium, and probability of finishing in the money use the Black-Scholes model with standard US options conventions (100 shares per contract) and are estimates, not guarantees; they assume constant volatility and do not model early assignment, dividends beyond the entered continuous yield, commissions, or bid-ask slippage. Probability of finishing in the money is a model estimate, and delta is only a rough proxy for it. For education only, not financial advice. Verify strikes and quotes with your broker before trading.
To locate these strikes on a live quote board, see our guide on how to read an options chain.
What this calculator computes
The strike price calculator takes the current stock price, a candidate strike, the option type, the quoted premium, and the option’s delta, then returns four readouts: moneyness, intrinsic value, breakeven, and a rough probability of ending in the money. Moneyness is in-the-money, at-the-money, or out-of-the-money relative to spot. Intrinsic value is the part of the premium that survives if expiration happened now. Breakeven is where the trade nets zero. The odds come from delta as a quick proxy.
Strike Price Calculator
Suggest an option strike price that matches your goal. Choose a target delta, a percent out of the money, or a target breakeven, and this tool finds the strike that best fits, then shows the resulting delta, moneyness, probability of finishing in the money, Black-Scholes premium, and breakeven. It also lists three nearby round strikes with their deltas so you can pick a real listed strike. Built for US equity options at 100 shares per contract.
Recommended tools and brokers
A strike price is something you select from the strikes your broker lists for a symbol, not a number that is truly calculated. This tool suggests the strike that best matches your delta, percent-out-of-the-money, or breakeven goal, then you pick the nearest listed strike. The suggested strike, delta, premium, and probability of finishing in the money use the Black-Scholes model with standard US options conventions (100 shares per contract) and are estimates, not guarantees; they assume constant volatility and do not model early assignment, dividends beyond the entered continuous yield, commissions, or bid-ask slippage. Probability of finishing in the money is a model estimate, and delta is only a rough proxy for it. For education only, not financial advice. Verify strikes and quotes with your broker before trading.
It assumes US equity options, 100 shares per contract, and results at expiration. The tool isn’t picking for you. It scores the level you feed it so you can compare a few side by side. The probabilities lean on Black-Scholes, so treat them as estimates, not promises.
How to use the calculator
The model and the math behind strike selection
Three relationships drive the decision. Moneyness comes first: with spot at S and strike at K, a call is in the money when S is above K, at the money when they’re equal, out of the money when S sits below K. Puts flip it. Intrinsic value follows directly: for a call, max(S minus K, 0); for a put, max(K minus S, 0). Anything above intrinsic is time value, which decays to zero by expiration.
Breakeven ties the level to the premium you pay. A long call breaks even at strike plus premium; a long put, at strike minus premium. Delta then approximates how likely the option is to finish in the money: a 0.30 delta call behaves, very roughly, like a 30% shot. That link is a Black-Scholes estimate. The formal probability a call ends in the money is N(d2), and for a put it’s N(-d2), where d2 sits one volatility-and-time step below d1. Delta tracks N(d1), so it slightly overstates the odds, but it’s close enough to rank candidates.
Here’s a worked grid for a $100 stock, calls roughly 30 days out, at moderate implied volatility. Intrinsic, breakeven, and the delta-based odds reconcile.
| Strike | Moneyness | Intrinsic | Premium | Delta | Breakeven | Est. ITM odds |
|---|---|---|---|---|---|---|
| $90 | ITM | $10.00 | $11.50 | 0.78 | $101.50 | ~73% |
| $95 | ITM | $5.00 | $7.20 | 0.64 | $102.20 | ~58% |
| $100 | ATM | $0.00 | $4.10 | 0.51 | $104.10 | ~46% |
| $105 | OTM | $0.00 | $2.05 | 0.36 | $107.05 | ~31% |
| $110 | OTM | $0.00 | $0.90 | 0.22 | $110.90 | ~18% |
Read across one row. The $90 call already holds $10 of intrinsic value, so most of its $11.50 cost is real equity, not hope. The $110 call is almost all time value, cheap to buy, but it needs an 11% move to break even and the model gives it under one-in-five odds. One contract controls 100 shares, so that $2.05 quote on the $105 line costs $205, also the most you can lose. For deeper mechanics, pair this with the delta option calculator.
Method comparison: how to choose a strike
Three methods dominate, and they answer different questions. A delta target anchors on probability. Breakeven anchors on the move you expect. A max-loss budget anchors on the dollars you’re willing to lose. None is universally right.
| Method | You set | Best when | Tradeoff |
|---|---|---|---|
| Delta target | A probability, say 0.30 to 0.40 | You care about hit rate | Ignores your price view |
| Breakeven | The level your forecast clears | You have a price target | Can pick low-odds bets |
| Max-loss budget | A dollar cap, then what fits | Risk control comes first | May force a poor pick |
Now a case where the conservative, lower-reward choice wins. You expect the $100 stock to grind to about $103 by expiration, nothing dramatic. The cheap $110 call tempts at $0.90, but its $110.90 breakeven sits far above your forecast, so it almost certainly expires worthless. The deeper $95 call costs $7.20, yet its $102.20 breakeven clears your target and its delta near 0.64 means it likely finishes in the money. The in-the-money pick is right here, because it matches the modest move you expect instead of betting on a jump you don’t.
Reading the output
Use the four numbers together. Moneyness shows how much of the premium is intrinsic versus time value. Breakeven gives the move required; compare it to your forecast first. The in-the-money odds are a Black-Scholes estimate built from delta, valid at a risk-free rate near 4% as of 2026, and they shift as volatility and days-to-expiration change. Finishing in the money is not the same as turning a profit, since a call can expire a few cents above the strike yet sit below breakeven.
Remember the limits. A long option can lose 100% of the premium paid. These figures are expiration snapshots; before then, theta and changing volatility move the value away from intrinsic. The probabilities are model output, not the market’s verdict. The OCC’s risk disclosure, the Characteristics and Risks of Standardized Options, is the authoritative reference, and the OIC’s educational material covers moneyness in depth. Once you’ve settled on a level, check its theoretical value with the black scholes option calculator or model the position in our options trading calculator. The strike price calculator is the first step in that chain.
FAQ
Does a strike price calculator pick the strike for me?
No. A strike is selected from the option chain, not computed from a formula. The tool scores the one you choose by showing its moneyness, intrinsic value, breakeven, and estimated odds of finishing in the money, so you can compare candidates and decide.
How does the strike set intrinsic value?
Intrinsic value is the gap between spot and strike when it favors the holder. For a call it equals max(spot minus strike, 0); for a put, max(strike minus spot, 0). An out-of-the-money option has zero intrinsic value, so its premium is all time value that decays to nothing.
What does delta say about the odds of finishing in the money?
Delta is a close proxy for the probability an option ends in the money. A 0.30 delta call acts like roughly a 30% chance. The precise figure is a Black-Scholes estimate, N(d2) for a call and N(-d2) for a put, and delta slightly overstates it. Treat it as an estimate, not a guarantee.
How do I calculate breakeven for a strike?
A long call breaks even at the strike plus the premium paid; a long put, at the strike minus the premium. So a $105 call bought for $2.05 breaks even at $107.05: the stock must clear that level at expiration before the position turns a profit.
Is the interactive calculator available yet?
The interactive strike price calculator is coming soon. For now this page gives the full selection math: the moneyness rule, the intrinsic and breakeven formulas, and the delta-to-odds shortcut, worked through with a $100 example you can copy.
