Interior design tools
Plan your space with confidence
30 free calculators for renovation and home decor. Measure, estimate, and decide — before you spend a single dollar.
Browse all 30 toolsPopular tools
A few favorites — see the full catalog for all categories.
Finishing
Paint Calculator
Estimate paint liters and cans for walls, doors, and windows.
Space Planning
Fit Check
Check if furniture fits in your room, including rotated 90°.
Windows & Textiles
Light Meter
Calculate lumens and fixtures by room type and area.
Budget & Shopping
Material Shopping List
Combined material list for paint, wallpaper, tile, laminate, and skirting.
Comfort & Color
Color Contrast Checker
WCAG contrast ratio between two colors for accessible interiors.
Finishing
Wallpaper Calculator
Estimate wallpaper rolls for your room including waste for pattern repeat.