Long Straddle Calculator
Buy a call and put at the same strike. See how much the stock needs to move to profit, with a full P&L chart.
Buy both a call and a put at the same strike price. Profits from large moves in either direction. You need the stock to move more than the total premium paid to be profitable. Best used before earnings, FDA decisions, or other catalysts.
Strategy Legs
How to Calculate a Long Straddle
A long straddle means buying both a call and a put at the same strike price and expiration. You profit from a large move in either direction — it doesn't matter whether the stock goes up or down, as long as it moves more than the total premium you paid.
This is a volatility strategy, not a directional strategy. Traders use straddles before events that could cause big moves: earnings announcements, FDA decisions, product launches, legal rulings, or economic data releases. The key is buying the straddle when implied volatility is relatively low (premiums are cheap) and the expected move is bigger than what the market is pricing in.
The calculator shows the total premium cost, both breakeven prices (one above, one below the strike), max loss (the total premium, if the stock finishes exactly at the strike), and the V-shaped P&L chart. The stock needs to move far enough in either direction to overcome the cost of both options.
Formula
Total Cost = (Call Premium + Put Premium) × 100. Upper Breakeven = Strike + Total Premium Per Share. Lower Breakeven = Strike − Total Premium Per Share. Max Loss = Total Cost (at the strike).
Example
TSLA is at $250 before earnings. Implied volatility is high but you think the move will be even bigger. You buy the $250 call for $12.00 and the $250 put for $11.00.
Total cost: ($12 + $11) × 100 = $2,300. Upper breakeven: $250 + $23 = $273. Lower breakeven: $250 − $23 = $227. TSLA needs to move $23 (9.2%) in either direction to profit. If TSLA gaps to $290 after earnings, call profit = ($290 − $273) × 100 = $1,700 net. If it crashes to $210, put profit = ($227 − $210) × 100 = $1,700 net. If TSLA doesn't move, you lose the full $2,300.
Frequently Asked Questions
When is a straddle better than a directional trade?
When you're confident a big move is coming but genuinely don't know the direction. Earnings with a history of large surprises, biotech stocks awaiting FDA approval, or stocks in takeover rumors are classic straddle setups. If you have a directional lean, a one-sided trade is usually more efficient.
Why do straddles lose money even when the stock moves?
Two reasons: (1) the stock didn't move enough to overcome the total premium cost, or (2) implied volatility crushed after the event. Even if the stock moves 5%, if the options were priced for a 10% move, both legs lose value due to IV crush. Always compare the straddle cost to the expected move size before entering.
What's the difference between a straddle and a strangle?
A straddle uses the same strike for both legs (ATM). A strangle uses different strikes — an OTM call and an OTM put. Strangles are cheaper because both options start out of the money, but they need a bigger move to profit. Straddles have a higher probability of profit but cost more. The P&L chart for a strangle has a flat bottom between the two strikes.
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Disclaimer: This calculator is for educational purposes only and does not constitute financial advice. Trading involves substantial risk of loss. Past performance does not guarantee future results. Always do your own research and consult with a licensed financial advisor before making investment decisions.