# Straddle & Strangle Calculator - Breakevens & Max Loss Source: https://theoptionsbench.com/straddle-calculator/ > Plain-text mirror for AI/LLM ingestion. Canonical HTML page: https://theoptionsbench.com/straddle-calculator/ --- Long straddle / strangle - key facts A long straddle or strangle buys a call and a put to profit from a big move in either direction - a defined cost, two breakevens, and a max loss equal to the premium you paid. Max loss The full net debit (call + put premium) × 100 - lost if the stock sits between the strikes at expiration. Breakevens Put strike - net debit (lower) and call strike + net debit (upper). Max profit Unlimited on the upside; large but capped on the downside (the stock can only reach $0). What it needs A move beyond a breakeven before time decay and any IV drop erode the premium. Want the full explanation? Read What is a Straddle? . How to set it up Outlook: Two trades wear one name. Long, you buy the Call and Put for a big move you can't direction-call; short, the income-seller sells both to bet the stock pins the strike and volatility falls. This site's calculator is the long version - the short side is undefined-risk and we don't publish a tool for it. Ideal DTE Long: 30-60 DTE so a slow mover still has runway before theta bites. Short (the income version): 30-45 DTE - the window where premium decays fastest without holding gamma into expiration week. Earnings plays are the exception: 1-7 DTE, in and out around the event. Strike selection At-the-money on both legs, full stop - that's what makes it a Straddle (a Strangle moves the strikes out-of-the-money, cheaper but needs a bigger move). The single ATM strike buys the tightest breakevens and, sold, collects the fattest credit. Enter when (IV) Opposite signals for the two sides. Long: only when IV Rank is low (under ~30) and you think the coming move is underpriced - long volatility hates rich IV. Short: only when IV Rank is elevated (~50+), so you're selling premium that's likely to deflate. Selling a Straddle into cheap IV is collecting pennies in front of the steamroller. Take profit Long: no fixed target - the move clears a breakeven or it doesn't; take it off when the catalyst is spent. Short: close around ~25% of the credit. It's a narrow ATM structure pinned to one point, so the last bit of premium isn't worth the gamma risk - 50% is a Strangle/spread target, not a knife-edge Straddle one. Manage / exit Long: exit before the post-event IV crush, not after - the stock can move as expected and you still lose if both legs deflate. Short: manage by ~21 DTE no matter what the P&L says; that's where gamma on an ATM position turns a small loss into a large one fast. Defining risk The short Straddle is naked on both sides - a naked Call (theoretically unlimited loss up) plus a naked Put (loss the whole way to zero). One earnings surprise, buyout, or overnight gap can cost many times the credit. To model the short side, use the Short Strangle & Straddle calculator (with its undefined-risk warning). Want a floor under it? Add wings - that's an Iron Butterfly. Use it when: You expect a big move but genuinely can't call the direction - earnings, a court ruling, an FDA decision - and the expected move is large relative to the combined premium. Buy it long when IV Rank is low so you're not overpaying for the move. Skip it when: Skip the long Straddle when IV is already rich or the catalyst is days away - the post-event IV crush can sink it even if the stock moves your way. Skip the short (naked) Straddle entirely in a retail account; if you want the sell-premium income, trade the defined-risk Iron Butterfly instead. Starting points, not rules - the conventions experienced sellers reach for first. Your account, thesis and risk move every number here. See every strategy's setup -> ## How to use this calculator - Enter the stock's current price and the number of contracts. - Enter the Call strike and Call premium for the call you're buying. - Enter the Put strike and Put premium - set both strikes equal for a straddle, apart for a strangle. - Read the result: net debit (your max loss), both breakevens, and how far the stock must move to profit. **What it tells you:** how big a move - up or down - the stock needs before a long straddle or strangle pays off, and what you risk to find out. ## How this calculator works A long straddle or strangle is a bet on **movement**, not direction. You **buy a call and buy a put** on the same stock and expiration; if the stock makes a big enough move either way, one leg gains more than the pair cost. Same strike for both is a **straddle**; a higher call strike and lower put strike is a **strangle**. Enter both strikes and both premiums. The calculator adds the premiums into a **net debit** - which is also your **max loss** - and finds the two **breakevens**: the call strike plus the debit above, the put strike minus the debit below. It then shows how far the stock must move from its current price, in percent, to reach each breakeven, so you can judge whether the expected move justifies the cost. Profit is **unlimited** on the upside and large but capped on the downside (a stock can only fall to zero). The payoff diagram is the tell-tale V: it bottoms at the max loss between the strikes and rises on both sides. ## Straddle vs strangle A **straddle** buys the call and put at the same (usually at-the-money) strike. It costs the most, but its breakevens are the tightest, so it needs the smallest move to start working. A **strangle** buys an out-of-the-money call and an out-of-the-money put. It is cheaper - less premium at risk - but the wider strikes push the breakevens further out, so the stock has to move more before either leg pays. Use a straddle when you expect a sharp move and want the tighter breakevens; a strangle when you want a lower-cost bet and expect a really large move. ## What about selling a straddle or strangle? This calculator is for the **long** version - where you _buy_ the call and the put. We deliberately don't offer a **short** (selling) calculator, and the reason is risk. Selling a straddle or strangle means selling a naked call and a naked put at the same time: the premium you collect is capped, but the loss is not. A naked short call carries **theoretically unlimited loss** if the stock keeps climbing, and the short put adds the whole way down to zero. One sharp move - an earnings surprise, a buyout, an overnight gap - can cost many times the credit you took in. That open-ended risk is the opposite of the defined-risk approach this site is built on, so the short version carries a prominent undefined-risk warning. Want defined-risk income from a stock you expect to stay range-bound? The Iron Condor Calculator and Iron Butterfly Calculator do that same job - sell premium, profit from a quiet stock - but with the loss capped by long wings, so there is a floor under the risk. To model the undefined-risk short version instead, use the Short Strangle & Straddle Calculator. ## Worked example A fixed, hypothetical illustration - not live market data. A hypothetical stock trades at $100. You buy the $100 call for $4.00 and the $100 put for $4.00 - an at-the-money straddle for a net debit of $8.00 per share. - Net debit: $8.00 × 100 = $800 per contract (your max loss). - Upper breakeven: $100 + $8.00 = $108. - Lower breakeven: $100 - $8.00 = $92. - Move needed: the stock must finish above $108 or below $92 - about an 8% move either way - just to break even. - At $120: the call is worth $20, the put $0; minus the $8 debit that is +$1,200. Found this useful? Get the bi-weekly email Strategy breakdowns, the edge cases these calculators surface, and trades worth watching - free, no noise. Join the free email -> ## ⚠ Common mistakes - Buying before earnings and getting IV-crushed. Implied volatility is highest right before a known event; after it, IV collapses and can deflate both options even if the stock moves as expected. The move has to beat that crush. - Underestimating the move you need. The breakevens are the strikes plus the full combined premium - often a larger move than people expect. A quiet stock bleeds the debit away. - Fighting time decay. Theta works against you on both legs and accelerates near expiration. A long straddle is a race between the move and the clock. - Confusing the two structures. A strangle is cheaper than a straddle but needs a bigger move; the lower cost is not a free lunch. - Treating "unlimited profit" as easy. The upside is unlimited in theory, but the position still has to clear a breakeven first. ## Frequently asked questions What is a straddle, and how is it different from a strangle? Both are long-volatility trades: you buy a call and a put on the same stock and expiration, betting on a big move either way. A straddle uses the same strike for both (usually at the money), so it costs more but has the tightest breakevens. A strangle buys an out-of-the-money call and put, so it is cheaper but needs a bigger move. Set the strikes equal for a straddle, apart for a strangle. What is the maximum loss on a long straddle or strangle? The full net debit you paid - the call premium plus the put premium, times 100 per contract. You lose all of it only if the stock finishes between the strikes at expiration (for a straddle, exactly at the strike), where both options expire worthless. It is a defined-risk trade: you can never lose more than what you paid to open it. How are the breakevens calculated? There are two. The upper breakeven is the call strike plus the total net debit per share; the lower breakeven is the put strike minus the total net debit per share. The stock has to finish beyond one of those two prices for the trade to profit at expiration. The calculator also shows how far - in percent - the stock must move from its current price to reach each one. What is the profit potential on a long straddle? Profit is unlimited on the upside, because the long call keeps gaining as the stock rises. On the downside it is large but capped, because the stock can only fall to zero - at which point the long put is worth its full strike. In both directions your profit is the option's value at expiration minus the net debit you paid. When does buying a straddle or strangle actually make money? Only when the stock moves far enough, fast enough, to clear a breakeven before time decay erodes the premium - and without implied volatility collapsing. The classic trap is buying a straddle right before earnings: the stock can move exactly as expected, yet the trade still loses because the post-event "IV crush" deflates both options. Check whether the expected move is large relative to the cost, and avoid buying when implied volatility is already high. When should I use a straddle or strangle? When you expect a big move but do not know the direction - buy a call and a put (same strike for a straddle, wider for a strangle) and profit if the stock moves far enough either way. The key is buying when implied volatility is low relative to the expected move, before a catalyst the market underprices. Skip it when IV is rich: a stalled stock or a post-event IV crush loses both legs.