Free Options Tool
Options Profit
Calculator
Calculate profit, loss, breakeven, and ROI for any call or put position. See the payoff diagram before you risk a dollar. Built by a guy who went 1-8 trading options and wishes he had used this first.
Quick Start Presets
Your Position
Buy Call (Bullish)
The stock's current market price
Price at which you can exercise
Cost per share (1 contract = 100 shares)
Each contract represents 100 shares
For reference only (no Black-Scholes modeling)
Max Profit
Unlimited
If stock rises indefinitely
Max Loss
$150
Limited to premium paid
Breakeven Price
$53.50
Stock must be above $53.50
Total Cost (Debit)
$150
1 contract x 100 shares x $1.50
If Stock Goes Up 10%
+$150.00
at $55.00 per share
If Stock Goes Down 10%
-$150.00
at $45.00 per share
Return on Investment
If the stock moves 10% in your favor, your ROI on the premium is +100.0%. That is the leverage of options — small moves in the underlying stock create magnified returns (and magnified losses). Remember: you can lose 100% of your premium if the option expires out of the money.
Payoff Diagram at Expiration
Green = profit, Red = loss. Dashed amber line = breakeven.
Profit/Loss at Expiration
P/L at various stock prices from -30% to +30% of current price
| Stock Price | Change | P/L ($) | P/L (%) |
|---|---|---|---|
| $35.00 | -30% | -$150.00 | -100.0% |
| $40.00 | -20% | -$150.00 | -100.0% |
| $45.00 | -10% | -$150.00 | -100.0% |
| $50.00(current) | +0% | -$150.00 | -100.0% |
| $55.00 | +10% | +$150.00 | +100.0% |
| $60.00 | +20% | +$650.00 | +433.3% |
| $65.00 | +30% | +$1,150.00 | +766.7% |
Position Summary
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Options 101: From a Guy Who Lost 8 Out of 9 Trades
“My options record is 1 win and 8 losses. I am the perfect person to teach you about options risk, because I have personally funded the education.”
That record is real. You can see the gory details on my worst trades page. I went 1 for 9 trading options, which means I am in the statistical majority: most retail options traders lose money. The difference between me and most people is that I will tell you about it, show you the math, and hopefully save you from making the same mistakes.
This calculator exists because I wish I had used something like it before every single one of those trades. If I had looked at the payoff diagram, understood the breakeven, and done the math on how much the stock needed to move just to break even, I probably would have skipped at least half of those trades. Maybe more.
How Options Actually Work (Calls vs. Puts)
An option is a contract that gives you the right (but not the obligation) to buy or sell a stock at a specific price (the strike price) before a specific date (the expiration). You pay a premium for this right. If you do not exercise the option before it expires, you lose the entire premium. That is it. That is the fundamental deal.
Call Options (Bullish)
A call gives you the right to buy the stock at the strike price. You profit when the stock rises above the strike price plus the premium you paid.
Buying a call: bullish bet, limited loss (premium paid)
Selling a call: bearish/neutral, unlimited loss potential
Put Options (Bearish)
A put gives you the right to sell the stock at the strike price. You profit when the stock falls below the strike price minus the premium you paid.
Buying a put: bearish bet, limited loss (premium paid)
Selling a put: bullish/neutral, loss if stock crashes
Why Most Options Expire Worthless
This is the fact that every options broker buries in the fine print. Depending on the study, somewhere between 60% and 80% of options held to expiration expire out of the money — worthless. For the buyer, that means a 100% loss on the trade. For the seller, it means they keep the entire premium.
The reason is simple: options are a decaying asset. Every single day that passes, the time value of the option decreases. This is called theta decay, and it works against the buyer and in favor of the seller. The stock does not just need to move in your direction — it needs to move enough to cover the premium you paid, and it needs to do it before expiration. That is a much higher bar than simply being right about the direction.
My 1-8 Record: The Brutal Math
In 8 of my 9 options trades, I was on the buying side. I was right about the direction more often than not — the stock moved the way I expected. But it did not move enough, or it did not move fast enough. Theta ate my position alive while I waited for the move. By expiration, the options were worthless even though my fundamental thesis was correct.
The lesson: being right about direction is not enough in options. You need to be right about direction, magnitude, and timing — all three. If you miss any one of them, you lose. Check my trading lessons page for the complete post-mortem.
The Greeks: Delta and Theta (Simplified)
The “Greeks” are variables that describe how an option's price changes. There are five of them, but only two matter for most retail traders. The other three (gamma, vega, rho) are important for market makers and professional traders, but if you are reading this calculator page, focus on these two:
Delta: How Much Your Option Moves
Delta tells you how much the option price changes for every $1 move in the stock. A delta of 0.50 means if the stock goes up $1, the option goes up $0.50. At-the-money options have a delta near 0.50. Deep in-the-money options approach 1.0 (they move nearly dollar-for-dollar with the stock). Far out-of-the-money options have a delta near 0, which means the stock can move $5 and your option barely budges. This is how many traders get burned: they buy cheap OTM options with a delta of 0.10 and then wonder why a $3 stock move only added $0.30 to their option.
Theta: Time Decay (The Silent Killer)
Theta measures how much value the option loses per day just from the passage of time. A theta of -0.05 means you lose $5 per contract per day even if the stock does not move at all. Theta accelerates as expiration approaches — the last 30 days are where the most value evaporates. This is why short-dated options are so dangerous for buyers and so attractive for sellers. Theta was responsible for most of my 8 losses. I would watch my position slowly bleed value day after day, even when the stock was flat. It is demoralizing. Do not underestimate it.
Why Selling Premium Is Usually Better Than Buying
If 60-80% of options expire worthless, that means option sellers win 60-80% of the time just by sitting there and collecting premium. This is the house edge in options. The buyer needs direction, magnitude, and timing. The seller just needs the stock to not move too much in the wrong direction.
Professional options traders — the ones who actually make money consistently — are overwhelmingly net sellers of premium. They sell slightly out-of-the-money puts on stocks they would not mind owning, and they sell covered calls on stocks they already hold. They let theta work for them, not against them. It is not glamorous, it is not exciting, and it does not produce 500% returns on a single trade. But it works.
After going 1-8 as an options buyer, I can tell you: the other side of the trade is where the money is. If I ever trade options again (big if), I will be on the selling side.
How to Use This Calculator (Do This Before Every Trade)
Enter your exact position
Put in the real numbers: stock price, strike, premium, and number of contracts. Do not guess. Use the actual quotes from your broker. The difference between a $2.00 premium and a $2.50 premium changes the breakeven by $50 per contract.
Look at the max loss first
Not the max profit. The max loss. Can you afford to lose that amount entirely? If the answer is no, reduce your contract size or pick a different trade. I lost money on 8 out of 9 trades. Your max loss is the number you need to be comfortable with.
Study the breakeven
How far does the stock need to move just to break even? If the stock needs to move 8% in your direction for you to not lose money, ask yourself: what is the probability of an 8% move in the right direction before expiration? Often the answer is lower than you think.
Check the payoff diagram
The visual makes it real. See where the line crosses from loss to profit. See how much you make at various price points. If the shape of the payoff diagram does not excite you after looking at the risk, skip the trade.
If in doubt, skip it
There will always be another trade. The market opens five days a week, 52 weeks a year. The biggest mistake in options is forcing a trade because you are bored or because you saw someone on Twitter post a winning screenshot. The best trade I ever made is all the options trades I did not make.
Use this calculator before every trade. I wish I had. My 1-8 record is permanent proof of what happens when you skip the math and trade on vibes. Do not be me. Be the person who looks at the numbers first.
Learn From My Mistakes
My Worst Trades — Full breakdown of every losing trade with pain meters and lessons learned
Trading Lessons — The 8 lessons I paid thousands of dollars to learn the hard way
My Trading Analysis — 2,068 trades analyzed with full transparency, including the options disasters
Frequently Asked Questions
How do you calculate options profit at expiration?
What is the breakeven price for an options trade?
Why do most options expire worthless?
What is the maximum loss when buying options?
What is the maximum loss when selling options?
Does this calculator account for the Greeks?
How many contracts should I buy?
Run the Numbers Before You Trade
Every options trade you are considering deserves 60 seconds in this calculator. Look at the max loss. Look at the breakeven. If the math does not make you excited, skip the trade. Your future self will thank you — mine certainly wishes I had.
Recommended Resources
Tools & books I actually use and recommend
TradingView
Best charting platform out there. Real-time data, screeners, and a community of millions of traders.
Try TradingViewThe Psychology of Money
Morgan Housel on why managing money is about behavior, not intelligence. Short, brilliant chapters you'll re-read.
View on AmazonThe Intelligent Investor
Ben Graham's timeless guide to value investing. The book Warren Buffett calls "the best investing book ever written."
View on AmazonSome links above are affiliate links. I only recommend products I personally use. See my full disclosures.
Keep Learning
My Worst Trades
Full breakdown of every losing trade with pain meters and lessons learned. Options losses front and center.
Read moreDataTrading Analysis
2,068 trades analyzed with full Schwab data. Win rates, average returns, and the truth about my options record.
Read moreGuideTrading Lessons
8 lessons I paid thousands of dollars to learn the hard way. Most of them involve options.
Read moreCompare Your Returns
Benchmark yourself against Buffett, the S&P 500, and my actual options record (spoiler: you probably win).
Read moreGameStock Market Time Machine
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Read moreCalculatorCompound Interest Calculator
The boring strategy that actually works. See how consistent investing beats options gambling every time.
Read moreGet Glen's Musings
Occasional thoughts on AI, Claude, investing, and building things. Free. No spam.
Unsubscribe anytime. I respect your inbox more than Congress respects property rights.