Free Interior Design Calculators & Planning Tools
Free, mathematically precise tools for homeowners and designers. Calculate paint quantities, rug sizes, furniture clearances, lighting lumens, and more. No signups, no paywalls, zero fluff.
3D Room Planner (Interactive Spatial Visualizer)
Real-time interactive 3D spatial room design with WebGL/WebGPU acceleration, PBR lighting simulation, and Furniture Fit clearance synchronization.
Advanced Rendering & Presentation Engine
Physically based rendering with 4K multi-camera viewpoints, photorealistic daylight PBR shaders, and client PDF presentation exports.
2D Room Planner (Live Spatial Canvas)
Interactive architectural canvas with 18 furniture categories, 36-inch primary circulation checking, and vector blueprint export.
Floor Plan Import & AI Room Reconstruction
Upload floor plan images, blueprints, or hand-drawn sketches to reconstruct editable 2D Room Planner models.
Product & Furniture Intelligence (Spatial Fit Engine)
Match real verified architectural furniture with your room dimensions, 2D/3D layouts, and budget constraints with zero fake commercial claims.
AI Design Copilot & Room Assistant
Context-aware architectural assistant grounded in your exact room dimensions, trade calculations, and furniture clearances.
Complete Room Design Project Workspace
Unified single source of truth connecting 2D planning, 3D visualization, trade calculations, and versioned client collaboration.
Intelligent Room Advisor (Unified Decision Engine)
Structured architectural interior design triage answering "What should I do with this room?" with verified circulation and budget scheduling.
AI Room Editor & Material Transformer
Selectively transform walls, flooring, furniture, lighting, and finishes while strictly preserving room architecture.
AI Room Designer (Photo to Reality Concept)
Upload a room photo to generate architectural redesign concepts with Reality Mode and Dream Mode budget allocations.
Room Intelligence Engine (Unified Multi-Trade Studio)
Enter room specs once to instantly compute paint, flooring, lighting, rug sizing, TV ergonomics, and budget allocations across all 10 trade tools.
Furniture Fit Checker ("Will It Fit?")
Checks door swing paths, walking corridors (minimum 36 inches), and scale proportions.
Room Budget Allocator
Itemizes furniture, rugs, lighting, and décor against hard budget caps ($250 to $10,000).
Decor Style DNA Finder
4-question visual diagnostic uncovering your personalized palette, textures, and aesthetic rules.
AI Room Doctor Diagnostic
Interactive 6-part spatial evaluation and prioritized architectural clearance fixes.
Paint & Wall Calculator
Calculates gallon/litre quantities for walls, ceiling & trim with door and window deductions.
Flooring & Tile Calculator
Computes tile boxes, hardwood planks, underlayment rolls, and grout weight requirements.
Wallpaper Roll Calculator
Determines double-roll requirements based on pattern repeat drop, waste, and ceiling height.
Rug Proportion Calculator
Determines perfect rug dimensions for living rooms, beds, and dining table pull-out clearances.
Curtain Length & Fullness Calculator
Calculates rod mounting height, stack-back width, and 2x–2.5x fabric fullness ratios.
Room Lumens & Foot-Candle Calculator
Computes required total lumen output and secondary lamp layering based on room function.
TV Size & Viewing Distance Calculator
Optimal screen size for 4K UHD viewing angles (30° to 40° field of vision THX standard).
Room Area & Perimeter Calculator
Calculates square footage and perimeter for L-shaped, rectangular, and irregular floor plans.
Engineered Beyond Generic Online Calculators
Most online calculators use rough square footage guesses designed solely to sell products. ILikeDecor builds every tool around strict architectural codes, ergonomic physics, and contractor-grade trade formulas.
| Capability / Standard | ILikeDecor Architectural Suite | Generic Home Calculators (Omni, etc.) | Retail Store Visualizers |
|---|---|---|---|
| Door & Window Void Deductions | ✓ Exact (21 sf door / 15 sf window) | ✗ Rough percentage guess | ✗ Ignored completely |
| Dynamic Metric & Imperial Conversion | ✓ Real-time auto-conversion | Partial (requires page reload) | ✗ US Imperial only |
| Architectural Codes & Safety Standards | ✓ ADA, NKBA, IESNA & THX Standards | ✗ None (raw mathematics only) | ✗ Marketing estimates only |
| Furniture Clearance & Transit Physics | ✓ Stair pivot & 36" corridor math | ✗ Basic width check only | ✗ None |
| User Privacy & Access | ✓ 100% Free, Zero Signup, Zero Ads | Heavy display ads & popups | Requires email / lead form |
| Contractor Spec Export | ✓ One-click text copy & Print PDF | ✗ Raw on-screen numbers | ✗ Shopping cart only |