Free Resources

Design Tools

Smart calculators and references to help designers and homeowners plan better spaces — free to use, no sign-up.

Calculators: 18
Plan editor: 1
Cost: Free

SiteSketch

Sketch a site plan in your browser — walls, doors, windows and dimensions — and export it as a DXF for your CAD software.

drawOpen SiteSketch

Part of the C3D Labs toolchain. In our university Design Lab, students survey a site in SiteSketch, then work out clearances and material quantities with these calculators — alongside AutoCAD, SketchUp, V-Ray and Coohom — before anything is built.

See C3D Labs

01

Planning & Reference

Measurements, clearances and proportions for laying out a room.

straightenarrow_forward Standard Dimensions Standard measurements and ergonomic guidelines for interior spaces. chairarrow_forward Furniture Spacing Guide Find recommended spacing and clearance guidelines for comfortable and functional interior layouts. tvarrow_forward TV Placement Calculator Find the ideal viewing distance and mounting height for your television. texturearrow_forward Rug Size Calculator Calculate the recommended rug size based on your room type and dimensions. filter_center_focusarrow_forward Golden Ratio Calculator Calculate harmonious dimensions using the Golden Ratio for balanced and aesthetically pleasing interior designs. swap_horizarrow_forward Unit Converter Instantly convert common interior design units including length, area, volume and more.

02

Materials & Quantities

How much to buy — with a little extra for wastage.

grid_onarrow_forward Tile Calculator Estimate the number of tiles required for your flooring or wall project. grid_4x4arrow_forward Grout Calculator Estimate the grout required for your tile installation project. format_paintarrow_forward Paint Calculator Estimate the amount of paint required based on room dimensions and number of coats. wallpaperarrow_forward Wallpaper Calculator Estimate the number of wallpaper rolls required for your room walls. layersarrow_forward Plywood Sheet Calculator Estimate the number of plywood sheets required for furniture and cabinetry projects. content_cutarrow_forward Cut List Optimizer Estimate the number of standard boards required for your cutting project. view_agendaarrow_forward Drywall Estimator Estimate the number of drywall sheets required for your project. border_stylearrow_forward Moulding & Trim Calculator Estimate the amount of moulding or trim required for your room. curtainsarrow_forward Curtain Fabric Calculator Estimate the amount of curtain fabric required based on window dimensions and curtain fullness.

03

Comfort & Cost

Light, cooling and budget — planned before you buy.

lightbulbarrow_forward Lighting Lumens Calculator Estimate the recommended lighting level for your room based on its size and purpose. ac_unitarrow_forward AC Tonnage Calculator Estimate the recommended air conditioner capacity based on your room dimensions. paymentsarrow_forward Interior Design Cost Calculator Estimate the approximate cost of your interior design project based on room size and finish quality.

Prefer an expert?

Let us plan it — and show it to you in 3D.

The calculators get you started. Our designers take care of the numbers, the layout and the finishes — and you see every room before work begins.

Talk to a designerarrow_forward