What is the difference between a call and put option?

A call option gives you the right to buy stock at the strike price. A put option gives you the right to sell at the strike price. Calls profit when stock rises; puts profit when stock falls.

What is intrinsic value?

Intrinsic value is the amount an option is "in-the-money." For calls: stock price minus strike price. For puts: strike price minus stock price. It's the value if exercised now.

Time value is the premium above intrinsic value, representing the possibility of future price movement. It decreases as expiration approaches (time decay or "theta").

When should I exercise an option?

Early exercise is rarely optimal for calls (you lose time value). Puts may be exercised early for dividends or if deep in-the-money. Usually better to sell the option than exercise.

Finance Calculators

Stock Options Calculator

Calculate options profit/loss, intrinsic value, time value, and break-even prices for call and put options. Features contract-based calculations (100 shares per contract), max loss analysis, and current return percentage.

How to Use the Stock Options Calculator

Use the Stock Options Calculator to options profit/loss, intrinsic value, time value, and break-even prices for call and put options. Features contract-based calculations (100 shares per contract), max loss analysis, and current return percentage.. Enter your values to get accurate, instant results tailored to your situation.

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Options Trading Guide

Risk & reward

Expert Tips

Implied Volatility Drives Option Prices: High IV = expensive options. VIX >30: Options overpriced 30-50%. VIX <15: Options cheap. Buy options when IV low (<20th percentile), sell when IV high (>80th percentile). Earnings, news spike IV 50-100%—avoid buying expensive options before events.
Theta Decay Accelerates Last 30 Days: Time decay (theta): Options lose value daily. 90 days out: Slow decay. 30 days out: Exponential decay. Last week: Lose 50% of remaining value. Buy: 60-90 days out for time. Sell: 30-45 days out to collect theta. Don't hold options into last week (theta crush).
Delta Shows Probability of Profit: Delta 0.30 call = ~30% chance of finishing in-the-money. 0.50 delta = at-the-money, 50% probability. Sell 0.30 delta for income (70% win rate). Buy 0.60-0.80 delta for directional plays (higher success). Avoid 0.10 delta (lottery tickets, 10% win rate).
Covered Calls Cap Upside for Income: Own 100 shares, sell call. Collect $200-500 premium/month. Stock rises above strike: Shares called away. Miss gains above strike. Example: Own $50 stock, sell $55 call for $2. Stock goes to $60: Keep $5 gain + $2 premium = $7 total. Miss $5 extra. Use for flat/moderate bull markets.

Essential Fundamentals — Options basics

Option Pricing

Intrinsic vs Extrinsic Value: Intrinsic value: In-the-money amount (stock $55, call strike $50 = $5 intrinsic). Extrinsic value: Time value + volatility premium (option price $7, intrinsic $5 = $2 extrinsic). As expiration nears, extrinsic decays to $0. Only intrinsic remains.
The Greeks: Delta: Price change per $1 stock move (0.50 delta = $0.50 move per $1 stock). Theta: Daily time decay ($0.05/day). Vega: Price change per 1% IV move. Gamma: Delta acceleration. Master delta & theta for 80% of options trading success.

Advanced Strategies — Strategic options trading

Timing & Volatility Management

IV Rank Strategy: Sell options when implied volatility ranks high in historical range. Buy when IV ranks low. This positions you to profit from mean reversion in volatility levels.
Earnings Cycle Positioning: Avoid buying options immediately before earnings due to inflated premiums. Consider selling premium or using spreads to define risk during high-volatility events.

Frequently Asked Questions

What is the difference between a call and put option?: A call option gives you the right to buy stock at the strike price. A put option gives you the right to sell at the strike price. Calls profit when stock rises; puts profit when stock falls.
What is intrinsic value?: Intrinsic value is the amount an option is "in-the-money." For calls: stock price minus strike price. For puts: strike price minus stock price. It's the value if exercised now.
What is time value?: Time value is the premium above intrinsic value, representing the possibility of future price movement. It decreases as expiration approaches (time decay or "theta").
When should I exercise an option?: Early exercise is rarely optimal for calls (you lose time value). Puts may be exercised early for dividends or if deep in-the-money. Usually better to sell the option than exercise.