A road trip from Kolkata to Leh-Ladakh is an exciting and adventurous journey, covering a vast distance and passing through diverse landscapes. Here’s a detailed plan for your trip:

Route Overview
**Total Distance**: Approximately 2,200-2,500 km (one way)
**Total Travel Time**: Around 8-10 days (one way, considering rest and sightseeing)

Suggested Itinerary

#### Day 1: Kolkata to Varanasi
- **Distance**: ~670 km
- **Travel Time**: 12-14 hours
- **Route**: Kolkata - Dhanbad - Aurangabad - Varanasi
- **Highlights**: Overnight stay in Varanasi, explore the ghats and temples.

#### Day 2: Varanasi to Lucknow
- **Distance**: ~320 km
- **Travel Time**: 6-8 hours
- **Route**: Varanasi - Jaunpur - Sultanpur - Lucknow
- **Highlights**: Overnight stay in Lucknow, enjoy local cuisine.

#### Day 3: Lucknow to Agra
- **Distance**: ~335 km
- **Travel Time**: 6-7 hours
- **Route**: Lucknow - Kanpur - Etawah - Agra
- **Highlights**: Overnight stay in Agra, visit the Taj Mahal and Agra Fort.

#### Day 4: Agra to Chandigarh
- **Distance**: ~450 km
- **Travel Time**: 8-9 hours
- **Route**: Agra - New Delhi - Panipat - Chandigarh
- **Highlights**: Overnight stay in Chandigarh, visit Rock Garden and Sukhna Lake.

#### Day 5: Chandigarh to Manali
- **Distance**: ~310 km
- **Travel Time**: 8-10 hours
- **Route**: Chandigarh - Mandi - Kullu - Manali
- **Highlights**: Overnight stay in Manali, explore local attractions.

#### Day 6: Manali to Jispa
- **Distance**: ~140 km
- **Travel Time**: 6-7 hours
- **Route**: Manali - Rohtang Pass - Keylong - Jispa
- **Highlights**: Overnight stay in Jispa, acclimatize to high altitude.

#### Day 7: Jispa to Sarchu
- **Distance**: ~85 km
- **Travel Time**: 3-4 hours
- **Route**: Jispa - Baralacha La - Sarchu
- **Highlights**: Overnight camping in Sarchu, high-altitude desert.

#### Day 8: Sarchu to Leh
- **Distance**: ~250 km
- **Travel Time**: 8-10 hours
- **Route**: Sarchu - Gata Loops - Pang - Tanglang La - Leh
- **Highlights**: Arrive in Leh, rest and acclimatize.

Key Considerations
1. **Vehicle Preparation**: Ensure your vehicle is well-serviced and capable of handling rough terrains, especially in the mountains.
2. **Permits**: Obtain necessary permits for Rohtang Pass and inner line permits for certain areas in Ladakh.
3. **Health**: Acclimatization is crucial to avoid altitude sickness. Carry medications and be prepared for emergencies.
4. **Accommodation**: Book accommodations in advance, especially in popular spots like Manali and Leh.
5. **Fuel**: Plan fuel stops carefully, as petrol stations are sparse in certain regions.
6. **Weather**: Check weather conditions before departure, as roads can be closed due to landslides or snowfall.

Packing Essentials
- Warm clothing, including thermal wear and jackets
- First aid kit and any necessary medications
- High-energy snacks and drinking water
- Maps and a GPS device
- Extra fuel cans and a vehicle repair kit
- Portable oxygen cylinders (for high altitudes)

Enjoy your adventurous road trip and stay safe!