Here’s a simple Affordable Interior Design Cost Calculator you can use to estimate charges (India, 2025).
1. Inputs You Need
- Carpet Area (sq ft) → size of flat / villa / room
- Package Type → Design only / Semi-Turnkey / Full Turnkey
- Base Rate (₹ / sq ft) → depends on package tier
- Material Multiplier → 1.2–1.5 for furniture & finishes
- Contingency % → 10–15% for extra charges
2. Suggested Budget Rates (2025)
| Package | Scope | Base Rate (₹ / sq ft) |
|---|---|---|
| Design Only | Layouts, 2D/3D visuals, material & furniture suggestions | 50 – 150 |
| Semi-Turnkey | Adds modular furniture, basic finishes, lighting, supervision | 150 – 300 |
| Full Turnkey (Budget Materials) | Complete interiors: carpentry, finishes, décor, lighting | 300 – 500+ |
3. Formula
Base Cost = Area × Base Rate
Material Cost = Base Cost × (Multiplier – 1)
Subtotal = Base Cost + Material Cost
Total Cost = Subtotal × (1 + Contingency %)
4. Example Calculation
Flat size = 800 sq ft
Package = Semi-Turnkey
Base Rate = ₹200 / sq ft
Multiplier = 1.3
Contingency = 10%
- Base Cost = 800 × 200 = ₹1,60,000
- Material Cost = 1,60,000 × 0.3 = ₹48,000
- Subtotal = 2,08,000
- Total = 2,08,000 × 1.1 = ₹2,28,800
👉 Approx ₹2.3 lakh for budget semi-turnkey interiors of 800 sq ft.
5. Quick Cost Bands (Affordable Interiors)
| Home Size | Design Only | Semi-Turnkey | Full Budget Turnkey |
|---|---|---|---|
| 1BHK (500–600 sq ft) | ₹30k – 90k | ₹90k – 1.8L | 1.8L – 3L+ |
| 2BHK (800–1,000 sq ft) | ₹50k – 1.5L | 1.2L – 3L | 2.4L – 5L+ |
| 3BHK (1,200–1,500 sq ft) | ₹75k – 2.2L | 1.8L – 4.5L | 3.6L – 7.5L+ |
Do you want me to build you a ready Excel / Google Sheet cost calculator where you just input area + package type and get instant estimates?
