Measures Risk and Return
It evaluates investment performance after considering the amount of volatility or total risk taken by the investor.
Investment Performance Tool
Sharpe Ratio Calculator
Measure how much excess return an investment generates for each unit of risk. Enter the portfolio return, risk-free rate, and return volatility to calculate the Sharpe ratio instantly.
Calculate Risk-Adjusted Return
Enter annualized values as percentages.
What Is the Sharpe Ratio?
The Sharpe ratio is a financial measurement that compares an investment's excess return with the volatility experienced to produce that return.
Compares Investments
The ratio can help compare portfolios, mutual funds, trading strategies, and other investments on a risk-adjusted basis.
Supports Better Decisions
A higher ratio generally indicates that an investment has delivered more excess return for each unit of risk.
How to Use the Sharpe Ratio Calculator
Complete these three steps to evaluate the risk-adjusted performance of an investment.
1
Enter Portfolio Return
Add the annual percentage return earned by the investment during the selected measurement period.
2
Add the Risk-Free Rate
Enter the annual return available from a low-risk benchmark for the same time period.
3
Enter Standard Deviation
Add the annualized volatility of returns, then select the calculate button to view the ratio and interpretation.
Sharpe Ratio Formula
The calculator subtracts the risk-free rate from the portfolio return and divides the result by the portfolio's standard deviation.
Sharpe Ratio = (Portfolio Return − Risk-Free Rate) ÷ Standard Deviation
Formula Components
- Portfolio return: The return generated by the investment over a specific period.
- Risk-free rate: The return expected from an investment considered to have very low default risk.
- Standard deviation: A measurement of how widely returns fluctuate around their average.
- Excess return: The portfolio return remaining after subtracting the risk-free rate.
Use values from the same period and frequency. For example, an annual portfolio return should be compared with an annual risk-free rate and annualized standard deviation.
Sharpe Ratio Calculation Example
Assume an investment generated a 12% annual return. The risk-free rate was 4%, while the investment's annual standard deviation was 10%.
First, calculate the excess return: 12% − 4% = 8%.
Next, divide the excess return by standard deviation: 8% ÷ 10% = 0.80.
The investment therefore has a Sharpe ratio of 0.80.
Portfolio Return
12%
Risk-Free Rate
4%
Excess Return
8%
Standard Deviation
10%
Sharpe Ratio
0.80
How to Interpret a Sharpe Ratio
These general ranges can provide context, but the most useful comparison is usually between similar investments measured over the same period.
| Sharpe Ratio | General Interpretation | What It May Indicate |
|---|---|---|
| Below 0 | Negative | The portfolio underperformed the risk-free benchmark. |
| 0 to 0.99 | Limited to acceptable | Excess return may be modest relative to volatility. |
| 1.00 to 1.99 | Good | The investment delivered a reasonable risk-adjusted return. |
| 2.00 to 2.99 | Very good | The investment generated strong returns relative to risk. |
| 3.00 or higher | Excellent | The historical risk-adjusted performance was exceptionally strong. |
These ranges are general guidelines rather than fixed investment rules. Results can change based on the measurement period, benchmark, return frequency, market conditions, fees, and data quality.
Why the Sharpe Ratio Is Useful
Looking only at total return can be misleading. Two investments may produce similar returns while exposing investors to very different levels of volatility. The Sharpe ratio adds risk to the comparison.
For example, a portfolio returning 14% with high volatility may have a lower Sharpe ratio than a portfolio returning 11% with more stable performance. The second investment may have produced a more efficient risk-adjusted result.
Common Uses
- Comparing mutual funds or exchange-traded funds.
- Evaluating portfolio managers and trading strategies.
- Reviewing the effect of diversification.
- Comparing an investment with a relevant benchmark.
- Assessing whether additional risk produced sufficient return.
Limitations to Consider
The Sharpe ratio uses standard deviation as its measure of risk. Standard deviation treats both positive and negative return fluctuations as volatility. It may therefore penalize investments that experience large positive returns.
The ratio also depends on historical data, which does not guarantee future performance. It should be considered alongside drawdown, downside risk, investment fees, liquidity, time horizon, and the investor's objectives.
Frequently Asked Questions
Find clear answers to common questions about Sharpe ratio calculations and risk-adjusted returns.
A Sharpe ratio above 1 is commonly considered good, above 2 is often considered very good, and above 3 may indicate excellent historical risk-adjusted performance. The appropriate benchmark depends on the asset class, strategy, and measurement period.
Yes. A negative Sharpe ratio means the portfolio return was lower than the selected risk-free rate. In that situation, the investor was not compensated with excess return for accepting portfolio risk.
Investors often use the yield of a government security that matches the investment period and currency. The portfolio return, risk-free rate, and standard deviation should all use consistent time periods.
Not always. A higher ratio generally indicates better historical risk-adjusted performance, but investors should also consider drawdowns, fees, liquidity, diversification, strategy risk, and future return expectations.
A Sharpe ratio of 1 means the investment generated one unit of excess return for each unit of total volatility measured by standard deviation.
The Sharpe ratio uses total volatility, including both upward and downward fluctuations. The Sortino ratio focuses only on harmful downside volatility, which may be more suitable when positive volatility is not considered a risk.
Yes. Calculate each investment separately using the same time period, return frequency, and risk-free benchmark. The investment with the higher ratio produced more historical excess return per unit of volatility.