Expected-move calculator
A common shorthand turns an implied volatility into a plus-or-minus amount over a number of days (a statistical estimate, not a prediction): price × implied volatility × √(days ÷ days in a year). This tool does that arithmetic on the numbers you enter.
No market data is loaded. Every number comes from what you type, and nothing you type is sent anywhere.
Inputs
Results
Enter your own numbers to see the results.
Range from the numbers you entered
Scenario A Scenario B
Enter your own numbers to draw the chart.
How it's calculated
Multiply the price by the implied volatility (as a decimal) and by the square root of days divided by days in a year. The annualized implied volatility you read from your own source, as a percentage.
Move = price × (IV ÷ 100) × √(days ÷ days in a year)Range = price − move to price + move
What this leaves out
- This is a statistical estimate from the volatility you entered, using a simplified formula. It is not a prediction of where price goes, and real moves are often larger or smaller. Not a recommendation.
- The shorthand assumes a simple bell-shaped spread of outcomes. Real price changes can be larger, and gaps happen.
Educational only. This calculator does arithmetic on the hypothetical numbers you enter. It is not financial advice or a recommendation, and it does not predict any result. Real trading includes costs and conditions this math leaves out.