Volatility Annualize Calculator
Enter the per-period return standard deviation and periods per year to annualize volatility.
Results
Fill in the inputs and click Calculate.
- Annualized Volatility
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Risk disclaimer
This conversion is statistical and for information only.
Why annualize?
Period σ is not directly comparable: annual ≈ per-period σ × √(periods/year). Daily × √365, weekly × √52.
Annualizing aligns with option implied-vol conventions.
How to use
- Enter the per-period standard deviation in percent.
- Enter periods per year (daily 365, weekly 52, monthly 12).
- Click Calculate to see annualized volatility.
Formula
- Annual σ = Period σ × √(Periods/Year)
Example
Daily σ 2% over 365 → ≈ 2×√365 ≈ 38.2%.
Weekly σ 3% over 52 → ≈ 3×√52 ≈ 21.6%.
FAQ
Which periods?
Use the cadence of your returns: 365 daily, 52 weekly, 12 monthly.
Assumption?
Independence across periods; autocorrelation can distort the annualization.