IV Rank Calculator
Find out where today's implied volatility sits in its yearly range.
Your numbers
As a percent, e.g. 40 for 40%.
The lowest IV over the past year.
The highest IV over the past year.
Results
- IV rank
- 50.00%
- Reading
- High — favours selling
How it works
Implied volatility is meaningless in isolation — 40% is low for one stock and extreme for another. IV rank fixes that by placing today's IV inside its own 52-week range, so 0% means the quietest the stock has been all year and 100% means the loudest. Because option premium rises with implied volatility, sellers generally want a high rank: you are being paid more for the same risk. IV rank is not IV percentile, which measures the share of days over the past year that IV closed below today's level. Rank is driven by the two extremes and can be skewed by a single spike; percentile is more stable but harder to compute by hand.
IV rank = (current IV − 52-week low) ÷ (52-week high − 52-week low)
Worked example
The stock's IV has ranged from 20% to 60% over the past year and sits at 40% today. IV rank is (40 − 20) ÷ (60 − 20) = 50% — squarely mid-range.
Common questions
What IV rank is high enough to sell?
Many premium sellers look for 50 or above, and prefer 70+. Below 25 the premium is usually too thin to justify the assignment risk.
How is IV rank different from IV percentile?
Rank compares today's IV to the highest and lowest readings of the year. Percentile counts how many days closed below today's IV. One volatility spike can distort rank while barely moving percentile.
Where do I find the 52-week IV high and low?
Most brokers show them on the option chain or a volatility tab. Wheel Income computes implied volatility per contract from the chain using Black–Scholes.
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Stop doing this by hand
Wheel Income screens live option chains for cash-secured puts and covered calls, then tracks every cycle from assignment through called away.
Try the screenerFor information and educational purposes only. Not investment advice. Options carry risk, including loss of the entire position.