Sharpe Ratio Calculator

What Is the Sharpe Ratio?

The Sharpe Ratio is a simple way to understand how much return an investment or portfolio has generated compared with the amount of risk taken to achieve that return. In other words, it helps you evaluate an investment’s risk-adjusted return rather than looking at returns alone.

The Sharpe Ratio was developed by William F. Sharpe, an American economist and Nobel Prize-winning financial theorist. It is widely used to evaluate portfolio performance and compare different investments.

A higher Sharpe Ratio generally means that an investment has provided better returns for the level of investment risk taken. A lower ratio may indicate that the investment generated less return relative to its volatility.

Simple Example

Suppose two investments both generate an average return of 10%. However, Investment A experiences large price fluctuations, while Investment B has much more stable returns.

Even though both investments have the same return, Investment B may have a higher Sharpe Ratio because it achieved a similar return with less risk.

This makes the Sharpe Ratio useful when comparing investments or portfolios where you want to consider both return and risk, rather than choosing an investment based on returns alone.

Sharpe Ratio Formula

The Sharpe Ratio measures how much return an investment generates compared with the amount of risk taken. A higher Sharpe Ratio generally indicates better risk-adjusted performance.

Sharpe Ratio Formula

Sharpe Ratio = (Portfolio Return − Risk-Free Rate) ÷ Standard Deviation

Here’s what each part of the formula means:

Portfolio Return

Portfolio Return is the return earned by an investment or portfolio over a specific period. It shows how much the investment has gained or lost.

Risk-Free Rate

The risk-free rate is the return an investor could expect from a relatively low-risk investment. Government securities are commonly used as a reference when calculating the Sharpe Ratio.

Standard Deviation

Standard deviation measures how much an investment's returns fluctuate over time. A higher standard deviation means greater volatility and, therefore, more variation in returns.

Simple Example

Suppose a portfolio earns a 12% return, the risk-free rate is 4%, and its standard deviation is 10%.

Using the Sharpe ratio calculation:

Sharpe Ratio = (12% − 4%) ÷ 10% = 0.80

So, the portfolio has a Sharpe Ratio of 0.80, meaning it generated 0.80 units of excess return for each unit of risk taken.

How to Use Our Sharpe Ratio Calculator

Our calculator makes it easy to measure an investment's risk-adjusted performance. You only need to enter three values:

1. Enter Investment Return (%)

Enter the expected annual return of your investment or portfolio. For example, if you expect a 10% annual return, enter 10.

2. Enter Risk-Free Rate (%)

Enter the current risk-free rate, such as the return from a Treasury bond or savings account. For example, if the risk-free rate is 4%, enter 4.

3. Enter Standard Deviation (%)

Enter the investment's standard deviation, which represents its volatility or level of risk. A higher standard deviation generally means the investment's returns fluctuate more.

4. Click Calculate

After entering all three values, click the Calculate button. The calculator will instantly calculate the Sharpe Ratio based on your inputs.

5. View the Calculation Breakdown

If you select Show Calculation Breakdown, the calculator will also show how the result was calculated, making it easier to understand the Sharpe ratio calculation.

Why Use This Calculator?

• Saves time compared with manual calculations.
• No need to apply the formula yourself.
• Provides a quick result based on your investment data.
• Helps compare the risk-adjusted performance of different investments.

Frequently Asked Questions (FAQs)