Put Spread Option Calculator

A put spread is a common options strategy that combines buying a put option and selling another put option with a lower strike price. This creates a defined risk and reward profile, allowing traders to profit from a decline in an asset's price while limiting potential losses.

What is a Put Spread?

A put spread is a popular options strategy that involves purchasing a put option and simultaneously selling another put option with a lower strike price. This creates a vertical spread where the trader benefits from a decline in the underlying asset's price while limiting potential losses.

Key Characteristics

Defined risk and reward profile
Limited downside potential
Lower cost than buying a single put option
Flexible expiration dates

Common Uses

Put spreads are often used by:

Investors looking to profit from a decline in an asset's price
Traders who want to limit their downside risk
Those who believe an asset will decline but not by a large amount

Put spreads are particularly effective in bearish markets or when you expect a moderate decline in an asset's price.

How to Use This Calculator

Our put spread option calculator helps you determine the potential profit, break-even points, and risk of your put spread strategy. Simply enter the required information in the calculator panel on the right, and the results will be displayed instantly.

Required Inputs

Current stock price
Strike price of the put option you're buying
Strike price of the put option you're selling
Number of contracts
Premium paid for the put option you're buying
Premium received for the put option you're selling

Interpreting Results

The calculator provides several key metrics:

Maximum profit potential
Break-even points
Net debit or credit
Risk per share

The maximum profit potential is calculated by multiplying the width of the spread by the number of contracts.

Formula Used

The put spread option calculator uses the following formulas to determine key metrics:

Maximum Profit Potential

Maximum Profit = (Strike Price Sold - Strike Price Bought) × Number of Contracts × 100

Break-Even Points

Upper Break-Even = Strike Price Sold + (Premium Received - Premium Paid)

Lower Break-Even = Strike Price Bought - (Premium Received - Premium Paid)

Net Debit or Credit

Net Debit/Credit = (Premium Paid - Premium Received) × Number of Contracts

Risk per Share

Risk per Share = Strike Price Bought - Current Stock Price

Worked Example

Let's walk through a practical example to demonstrate how the put spread option calculator works.

Scenario

You want to create a put spread on XYZ stock with the following parameters:

Current stock price: $50
Strike price of put option you're buying: $45
Strike price of put option you're selling: $50
Number of contracts: 2
Premium paid for the $45 put: $2.50
Premium received for the $50 put: $1.00

Calculations

Metric	Calculation	Result
Maximum Profit	(50 - 45) × 2 × 100	$100
Upper Break-Even	50 + (1.00 - 2.50)	$48.50
Lower Break-Even	45 - (1.00 - 2.50)	$46.50
Net Debit/Credit	(2.50 - 1.00) × 2	$3.00 credit
Risk per Share	45 - 50	$5.00

Interpretation

In this example, the put spread strategy has:

A maximum profit potential of $100
Break-even points at $48.50 and $46.50
A net credit of $3.00
A risk of $5.00 per share

Frequently Asked Questions

What is the difference between a put spread and a covered call?: A put spread is a bearish strategy that profits from a decline in an asset's price, while a covered call is a bullish strategy that profits from an increase in an asset's price.
How do I determine the best strike prices for a put spread?: The ideal strike prices depend on your market outlook and risk tolerance. Generally, you want the strike prices to be close to the current price but with enough width to capture potential gains.
What is the time decay effect on a put spread?: Time decay (theta) can erode the value of your put spread over time. The closer the expiration date, the more significant the impact of time decay on your strategy.
Can I use a put spread to limit my downside risk?: Yes, a put spread allows you to profit from a decline in an asset's price while limiting your potential losses to the net debit of the strategy.
How does a put spread compare to buying a put option?: A put spread typically costs less than buying a single put option and offers more flexibility in terms of expiration dates and strike prices.