Interior Design & Decorating

Measure individual paint faces with their own openings and coats. Compare product-specific volume ranges, real containers, matching stock and optional cost.

Reproduce one source-labelled electrical load schedule from connected volt-amperes and explicitly copied line multipliers—without choosing code factors or sizing a service, feeder, conductor or breaker.

Convert square meters to square feet. Area conversion for real estate and flooring. Free unit converter with precise, instant browser-based conversions — no

Plan whole drywall sheets from measured wall and ceiling faces, openings, explicit allowance, exact selected sheet dimensions, and price.

Build a measured multi-area takeoff, compare exact carton coverage with a reviewed source-tile count, and price whole packages after matching inventory.

Simple in-browser notepad with auto-save. Write quick notes that persist in your browser. Download as text file. No signup needed.

Count evenly spaced path fixtures and compare manufacturer fixture VA with an entered transformer allowance in two separate planning modes.

Compare 12, 10, 8 and 6 AWG cable using current, one-way length and conductor resistance. See when no candidate meets your entered voltage drop limit.

Build an installed quote, compare lifetime costs and calculate material packs. Separate payment-day cash from later reimbursements using your project records.

Estimate appliance kWh and cost by day, week, average month, current calendar month, and year, with an optional regional CO₂ factor.

Verify furniture clearances and walkway paths in a room layout. Free online interior design calculator with instant, accurate results.

Recommend rug dimensions based on room size and furniture placement style. Free online interior design calculator with instant, accurate results.

Apply the 60-30-10 interior design rule to room color proportions. Free online interior design calculator with instant, accurate results.

Convert lumens and room area to lux or foot-candles for task lighting design. Free online interior design calculator with instant, accurate results.

Estimate paint gallons for walls using room dimensions and coverage rate. Free online interior design calculator with instant, accurate results.

Calculate curtain panel width and total fabric for desired fullness. Free online interior design calculator with instant, accurate results.

Calculate curtain stack-back width when panels are open. Free online interior design calculator with instant, accurate results.

Calculate backsplash tile quantity including grout joint waste. Free online interior design calculator with instant, accurate results.

Plan equal shelf spacing inside a bookcase or cabinet. Free online interior design calculator with instant, accurate results.

Calculate mirror mounting height for vanity or decorative placement. Free online interior design calculator with instant, accurate results.

Recommend LED color temperature (Kelvin) by room type and mood. Free online interior design calculator with instant, accurate results.

Calculate paint or wallpaper area for a single accent wall. Free online interior design calculator with instant, accurate results.

Select ceiling fan blade span based on room square footage. Free online interior design calculator with instant, accurate results.

Measure up to eight non-overlapping rectangles and exclusions. Compare independently reviewed supplier billable area and carpet-only price without a generic waste percentage.

Calculate nail/screw height to center artwork at eye level. Free online interior design calculator with instant, accurate results.