Enter your portfolio return, risk-free rate and standard deviation to calculate the Sharpe Ratio instantly. The standard metric for evaluating whether an investment strategy generates returns proportional to the risk taken. Free, no signup required.
The total annualised return your portfolio generated over the measurement period. If your portfolio grew 12% over 12 months, enter 12. If you have monthly returns, annualise them first by compounding (multiplying 1 + monthly return values, taking the 12th root, then subtracting 1).
Use the same time period consistently for all three inputs. Mixing periods produces meaningless results.
The return on a risk-free benchmark for the same period. Standard choices:
USD portfolios: 3-month US Treasury bill yield
EUR portfolios: ECB deposit rate or 3-month Euribor
GBP portfolios: SONIA or 3-month UK gilt yield
The risk-free rate is roughly the return you could have earned with near-zero risk by holding short-term government debt. Anything above this represents compensation for taking on risk – which is what the Sharpe Ratio measures.
The annualised standard deviation of your portfolio’s returns. This measures volatility – how much your returns fluctuated around the average. A portfolio with 15% standard deviation moves around its mean by approximately 15 percentage points in a typical year.
Most brokerages, fund factsheets and portfolio tracking tools publish this figure directly. If you only have monthly volatility, multiply by the square root of 12 to annualise it.
The total annualised return your portfolio genera
Sharpe Ratio = (Portfolio Return – Risk-Free Rate) / Standard Deviation
The numerator (portfolio return minus risk-free rate) is the excess return – the return above what could have been earned without taking any risk.
The denominator (standard deviation) is the total volatility of the portfolio – how much returns fluctuated around the average.
The ratio expresses excess return per unit of volatility. Higher is better, holding asset class constant.
ted over the measurement period. If your portfolio grew 12% over 12 months, enter 12. If you have monthly returns, annualise them first by compounding (multiplying 1 + monthly return values, taking the 12th root, then subtracting 1).
Use the same time period consistently for all three inputs. Mixing periods produces meaningless results.
A portfolio with the following characteristics over one year:
| Input | Value |
|---|---|
| Portfolio return | 11.0% |
| Risk-free rate | 4.3% |
| Standard deviation | 14.5% |
Sharpe Ratio = (11.0 – 4.3) / 14.5 = 0.46
Interpretation: the portfolio generated 0.46 units of excess return per unit of volatility. This is below the “good” threshold of 1.0, suggesting the portfolio took meaningful risk without producing proportionally strong returns.
Compare to a second portfolio over the same period:
| Input | Value |
|---|---|
| Portfolio return | 9.0% |
| Risk-free rate | 4.3% |
| Standard deviation | 7.0% |
Sharpe Ratio = (9.0 – 4.3) / 7.0 = 0.67
The second portfolio earned a lower nominal return (9% vs 11%) but had a higher Sharpe Ratio (0.67 vs 0.46). On a risk-adjusted basis, the second portfolio outperformed despite the lower headline return. This is exactly what the Sharpe Ratio is designed to detect.
| Sharpe Ratio | Interpretation |
|---|---|
| Below 0 | Portfolio underperformed the risk-free rate |
| 0 – 0.5 | Poor risk-adjusted performance |
| 0.5 – 1.0 | Weak to acceptable |
| 1.0 – 2.0 | Good risk-adjusted return |
| Above 2.0 | Strong – but verify the source |
The Sharpe Ratio above 2.0 deserves scrutiny. Genuinely exceptional risk-adjusted returns are rare and difficult to sustain. A Sharpe above 2.0 often results from one of three situations: a short measurement period producing noisy results, smoothed or infrequently-priced returns (common in private investments), or hidden tail risk that has not yet materialised.
These thresholds also vary by asset class. A Sharpe Ratio of 0.8 may be strong for a long-only equity fund but weak for a market-neutral hedge fund. Always compare your result against peers in the same investment category, not against an absolute threshold.
Comparing portfolios or funds with different risk profiles. Two funds with different returns and volatilities cannot be compared directly. The Sharpe Ratio normalises them, making fair comparison possible.
Evaluating active manager skill. A manager who returned 12% with 8% volatility outperformed one who returned 15% with 22% volatility on a risk-adjusted basis. Sharpe surfaces this distinction.
Assessing whether to add risk to your portfolio. If adding high-volatility holdings raises your portfolio’s return but reduces its Sharpe Ratio, the additional risk is not being adequately compensated.
Tracking portfolio performance over time. Calculate rolling Sharpe Ratios (12-month or 36-month windows) to see whether risk-adjusted performance is improving or deteriorating.
Three inputs: your portfolio’s total return as a percentage, the risk-free rate as a percentage, and the annualised standard deviation as a percentage. All three must cover the same time period – typically one year. Mixing time periods produces incorrect results.
For USD portfolios, use the 3-month US Treasury bill yield. For EUR portfolios, use the ECB deposit rate or 3-month Euribor. For GBP portfolios, use SONIA or short-term gilt yields. Match the risk-free rate to the currency and time period of your portfolio measurement.
Yes. A negative Sharpe Ratio means your portfolio earned less than the risk-free rate – you would have done better holding cash or T-bills. Most professional benchmarks treat negative Sharpe Ratios as meaningless rather than rank them – if you lost money relative to risk-free, the risk-adjusted analysis breaks down.
Above 1.0 is generally considered good for traditional long-only portfolios. Above 2.0 is excellent but warrants scrutiny – genuinely sustainable Sharpe Ratios above 2.0 are rare. Context matters: hedge funds and market-neutral strategies often have higher Sharpe Ratios than long-only funds because they take less directional market risk.
Three common causes. First, short measurement periods (under 12 months) produce noisy results that can be inflated by chance. Second, smoothed or infrequently-priced returns (such as private equity NAVs) understate true volatility, inflating the ratio. Third, strategies with hidden tail risk – option selling, carry trades, leveraged yield strategies – can exhibit high Sharpe Ratios during calm periods that collapse when stress events occur. Always verify the source of unusual Sharpe Ratios before trusting them.
Use Sharpe for diversified portfolios with reasonably symmetric return distributions – traditional equity and bond portfolios. Use Sortino when your strategy has asymmetric returns, when upside volatility is desirable (such as hedge funds or options strategies), or when you specifically want to measure downside risk separately. Many professional investors compute both.
No. You must enter annualised figures for all three inputs. If you have monthly data, compound your monthly returns to get an annual return, and multiply your monthly standard deviation by the square root of 12 to get the annualised volatility.
For the complete professional treatment of the Sharpe Ratio – mathematical derivation, hedge fund manipulation tactics, rolling Sharpe methodology, comparison with Sortino, Treynor and Information Ratio, and when Sharpe completely breaks down:
👉 Sharpe Ratio Explained: Theory, Applications and Limitations
Â
measures risk-adjusted return using only downside volatility, not total volatility
evaluate investment profitability using discounted cash flows
measure interest rate sensitivity for fixed income portfolios