Updated · Methodology: named formula library
Sharpe Ratio Calculator
Risk-adjusted return: excess return per unit of volatility.
(12% − 4.5%) / 15% = 0.500. Good > 1, very good > 2.
Why This Calculation Matters
The Sharpe Ratio Calculator helps you make better investing decisions by putting the math directly in front of you. Instead of relying on averages or guesswork, plug in your own numbers and see how the key inputs, rate, term, amount, and timing, interact. Small changes to any one of them can have outsized effects over years or decades.
How to Use This Calculator
- Enter your values in the input fields, each one has a label and help text explaining what to type.
- Results appear instantly as you type; there's no "calculate" button to press.
- Change any input to compare scenarios side by side.
All math happens in your browser. Nothing you type is sent to a server, saved, or shared.
Key Inputs to Get Right
The most important numbers are usually the interest rate and the time horizon. Over years or decades, small rate differences compound into large dollar differences, so it's worth sanity-checking the rate against current market data before acting on any result.
How to Use
Enter values in the fields on the left. Results update as you type, no submit button needed.
Understanding Results
Each output shows the calculated figure plus a breakdown of contributing inputs. Compare scenarios by editing any value.
Accuracy Notes
Every Sharpe Ratio Calculator on CalcIntel uses a documented formula. Results are estimates, real outcomes depend on assumptions and market conditions not captured in a simplified calculation.
Formula
ROI = (gain − cost) ÷ cost × 100. Annualized ROI adjusts for holding period: ((1 + ROI)^(1/years) − 1) × 100.
Worked Example
12% return, 4.5% RF, 15% σ
- return
- 12
- riskFree
- 4.5
- stdev
- 15
- Result
- Sharpe 0.50
(12 − 4.5) / 15 = 0.50. Subpar — most acceptable strategies target ≥ 1.0.
When to Use This Calculator
- Model scenarios before making a major financial decision involving investing.
- Compare different inputs side by side to see how rate, term, or amount changes your outcome.
- Sanity-check numbers a lender, advisor, or spreadsheet has given you.
- Build a realistic financial plan grounded in your actual numbers, not averages.
Limitations & Common Mistakes
- Results are estimates, actual terms depend on credit, lender policy, taxes, and fees not captured here.
- Rates and prices change daily; recompute with current numbers before signing documents.
- Does not constitute financial advice. For major decisions, consult a licensed advisor.
Frequently Asked Questions
How is the Sharpe ratio calculated?
Sharpe = (R − Rf) / σ, where R = portfolio return, Rf = risk-free rate (typically 3-month Treasury), σ = standard deviation of returns. Higher Sharpe = better risk-adjusted return. Annualize by multiplying by √(periods per year).
What's a good Sharpe ratio?
< 0: losing money relative to risk-free. 0–1: subpar. 1–2: good. 2–3: very good. > 3: exceptional, but suspicious — verify the data. Long-term S&P 500 Sharpe is around 0.5; top hedge funds target 1.0+.
Sharpe vs Sortino vs Treynor?
Sharpe penalizes all volatility (up and down). Sortino only penalizes downside volatility — better for asymmetric strategies. Treynor uses beta (market risk) instead of total volatility. Sharpe is the most common; Sortino is increasingly preferred for hedge fund evaluation.
Why do hedge funds love Sharpe?
It's a simple, comparable risk-adjusted return metric. But it can be gamed — selling tail-risk options produces a high Sharpe right up until the tail event hits (LTCM, 2008). Always check max drawdown alongside Sharpe.
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Source: BLS Consumer Price Index, 2026.