Creating an accurate interior design cost calculator for India involves considering various factors that contribute to the overall expenses of a project. While a detailed quote from a professional designer is the most precise way to estimate costs, here’s a simplified cost calculator to provide a rough estimate for interior design services in India:

Design Consultation:
- Initial consultation fee: INR ________ (Typically ranges from INR 5,000 to INR 20,000)
Space Planning:
- Cost per room: INR ________ (Ranges from INR 10,000 to INR 30,000)
Material and Color Selection:
- Cost per room: INR ________ (Ranges from INR 20,000 to INR 50,000)
3D Rendering:
- Cost per rendering: INR ________ (Ranges from INR 5,000 to INR 20,000)
Project Management:
- Percentage of total project cost: _____% (Ranges from 8% to 15%)
Custom Furniture Design:
- Cost per piece: INR ________ (Varies based on complexity and materials)
Site Visits:
- Cost per visit: INR ________ (Ranges from INR 5,000 to INR 15,000)
Interior Design Package:
- Full design package for the entire home: INR ________ (Varies widely based on project size and requirements)

Now, calculate the estimated total cost using the above figures and adjusting them based on your specific needs and preferences. Remember that these are approximate values, and the actual cost may vary based on your location, the complexity of the project, and the specific services required.

For a more accurate estimate, it is recommended to reach out to local interior designers, discuss your project in detail, and obtain tailored quotes based on your specific requirements.