Interactive toolRuns in your browser

Days to Expiry Calculator

Count the calendar days and approximate trading days from today to any expiry date, and see the next Nifty (Tue) and Sensex (Thu) expiries.

Quick answer: Days to expiry is the number of calendar days from today until a contract's expiry date; this tool counts calendar and approximate trading days to any date you pick and shows the next Nifty and Sensex expiries.

Expiry date Or pick

How to use it

Pick an expiry date (or a quick option). The tool shows calendar days remaining, an approximate count of trading days (excluding weekends), and weeks/days breakdown. Trading days are approximate — they do not subtract exchange holidays, so verify against the NSE/BSE holiday calendar.

Frequently asked questions

How do I calculate days to expiry?

Count the calendar days from today's date to the contract's expiry date. This tool does it for you and also estimates trading days by excluding weekends.

What is 'days to expiry' used for?

It drives time decay (theta) and option pricing — the fewer days to expiry, the faster an option's time value erodes. It is a core input to the greeks and to planning exits.

Does this count trading days or calendar days?

Both. Time decay technically runs on calendar days, but the tool also shows approximate trading days (weekends removed) as a practical reference. It does not remove exchange holidays.

When is the next Nifty expiry?

Under current rules Nifty expires on Tuesday. The quick-select option computes the next Tuesday; always confirm on NSE, as the expiry weekday has been revised before.

Runs entirely in your browser — no data leaves your device. Illustrative and educational only; exchange rules and charges apply in practice.