IRCTC Train Berth Locator & Tatkal Booking Countdown

Enter your coach and seat number to instantly locate your train berth (Lower, Middle, Upper, Side Lower, Side Upper), cabin bay, and window view for Sleeper, 3A, 3E, 2A, and CC classes.

Interactive IRCTC Train Berth Locator & Tatkal Booking Countdown
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Formula & Calculation Methodology

Seat Modulo Calculation: Sleeper/3A uses 8-berth modulo pattern; 3E uses 9-berth modulo; 2A uses 6-berth modulo.

BerthType = SeatNumber pmod{8}

Step-by-Step Worked Example

Coach: 3rd AC (3A) | Seat Number: 25

  1. Modulo 8 calculation: 25 mod 8 = 1
  2. Remainder 1 maps to Lower Berth (LB) with Window view
  3. Bay calculation: ceil(25 / 8) = Bay #4 (Berths 25 to 32)
  4. Position: Main inside compartment cabin
Result: Lower Berth (LB) | Window Seat | Bay #4

Frequently Asked Questions

When does Tatkal ticket booking open on IRCTC?

Tatkal booking opens precisely at 10:00:00 AM IST for AC classes (1A, 2A, 3A, 3E, CC) and at 11:00:00 AM IST for Non-AC classes (Sleeper, 2S), one day prior to the train departure date from origin station.

Which seat numbers are Window Lower Berths in 3rd AC (3A)?

In 3A and Sleeper coaches, seat numbers ending with modulo 1 (e.g. 1, 9, 17, 25, 33, 41, 49, 57) and Side Lower berth modulo 7 (e.g. 7, 15, 23, 31, 39, 47, 55, 63) are Window seats.

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