Expiry & settlement tools
Free, private, in-browser calculators for everything around expiry — days to expiry, live countdowns, the decay curve, option value, expected move and cash settlement. Nothing is sent to any server.
Expiry tools: a set of client-side calculators to count days to expiry, watch a live expiry countdown, visualise time decay, split an option's premium into intrinsic and time value, estimate the expected move, and compute cash settlement value at expiry.
Days to Expiry Calculator
ToolCount the calendar days and approximate trading days from today to any expiry date, and see the next Nifty (Tue) and Sensex (Thu) expiries.
Expiry Countdown Widget
ToolA live countdown to the next Nifty (Tuesday), monthly (last Tuesday) and Sensex (Thursday) expiry, in days, hours, minutes and seconds.
Expiry Calendar
ToolUpcoming weekly and monthly expiry dates for Nifty (NSE, Tuesday) and Sensex (BSE, Thursday) for the months ahead, computed in your browser.
Theta Decay Visualizer
ToolVisualise how an option's time value decays into expiry. Enter spot, strike, days and implied volatility to see the decay curve and per-day…
Option Value Calculator
ToolSplit any option premium into intrinsic and extrinsic (time) value, and see its moneyness. Enter spot, strike, premium and type.
Expected Move Calculator
ToolEstimate the expected move into expiry from spot, implied volatility and days remaining — the approximate one standard-deviation range.
Settlement Value Calculator
ToolCompute the cash settlement value of an in-the-money option at expiry from the final settlement price, strike, lots and lot size.