How many day to reach kolkata by train?

hi friend if i m in delhi and i want to go kolkata by train so how many day to reach in kolkata if you know please tell me

2302 Kolkata Rajdhani - 16 Hrs 55 min
2304 Poorva Express - 24 hrs 20 min.
2312 Kalka mail - 25 hrs 05 min
2314 Sealdah Rajdhani - 17 hrs. 40 min
2324 New Delhi Howrah Wxpress - 22 hrs 40 min
2330 WB Sampark Kranti Express - 22 hrs 20 min
2382 Poorva Express - 24 hrs 20 min
3008 Udyan Abha Toofan Express - 35 hrs.

Hi. If you take the Kolkata Rajdhani from New Delhi railway station, you would take 18hours to reach Kolkata.
If you take other trains like Poorva or New Delhi - Howrah, you would take around 23 hours to reach. Rajdhani is best.

there are 5 types of train in indian railways. it depend on which type of train you want to travel here are details.
shatabadi express it average is 80.00 k.m. per hour
rajdhani express it average is 70.00 k.m. per hour
superfast express it avarage is 60.00 km.per hour
mail & express it average it 50.00 k.m. per hour
passanger trains it average it 40.00 km per hour.
the distance between delhi and kollakatta is 1441 km.
so you just calculate how much time it will take by thrain you perfer. if it superfast then it will take 24 to 25 hours.
shatabadi express are running in short distance route below thousand k.m,.

a day

In Rajdhani Exp... it will take about 17 to 18 hrs. It starts from Delhi at 4.45 in the evening and reaches Howrah by 9 in the morning next day.