# Cabinet Door Calculator > Compute door widths for multi-door cabinets given opening width and gap allowances. **Category:** Math **Keywords:** cabinet, door, width, kitchen, joinery **URL:** https://complete.tools/cabinet-door-calc ## How it calculates The formula used in the Cabinet Door Calculator is: Door Width = (Total Opening Width - (Number of Doors - 1) × Gap) ÷ Number of Doors Where: - Door Width is the calculated width for each individual door. - Total Opening Width is the full width of the cabinet opening where the doors will be installed. - Number of Doors is the total count of doors intended for the opening. - Gap is the desired space between each door to allow for smooth operation and aesthetic appeal. This formula ensures that the total width of all doors combined, including the gaps, equals the total opening width. It is vital to accurately input the total width and the number of doors to achieve correct door sizes. ## Who should use this Cabinet makers designing custom cabinetry for residential kitchens, carpenters building multi-door storage solutions in commercial settings, and interior designers planning functional layouts in modern homes. Additionally, DIY enthusiasts undertaking home renovation projects may find this tool beneficial when installing new cabinetry. ## Worked examples Example 1: A cabinet opening measures 60 inches wide, and the user wants to install 3 doors with a gap of 1 inch between each door. Using the formula: Door Width = (60 - (3 - 1) × 1) ÷ 3 = (60 - 2) ÷ 3 = 58 ÷ 3 = 19.33 inches. Each door should be approximately 19.33 inches wide. Example 2: A cabinet opening is 72 inches wide with 4 doors and a gap of 0.5 inches between them. Using the formula: Door Width = (72 - (4 - 1) × 0.5) ÷ 4 = (72 - 1.5) ÷ 4 = 70.5 ÷ 4 = 17.625 inches. Thus, each door should be about 17.625 inches wide. ## Limitations The Cabinet Door Calculator has specific limitations. First, it assumes that all doors will be of equal width, which may not be suitable for all designs. Second, it does not account for variations in cabinet construction or door framing that could affect actual measurements. Third, the calculator does not provide for adjustments due to hardware thickness, which could influence the final door width. Lastly, it assumes standard gap settings; users may need to manually adjust if non-standard gaps are preferred. ## FAQs **Q:** How does the calculator account for door hardware thickness? **A:** The calculator does not account for door hardware thickness, which should be considered separately in the overall design and measurement process. **Q:** Can this calculator be used for non-rectangular openings? **A:** The calculator is designed specifically for rectangular openings; non-rectangular designs require different measurement approaches and may not yield accurate results with this tool. **Q:** Is the calculator suitable for varying door heights? **A:** The calculator focuses solely on width; varying door heights must be managed independently based on design requirements. **Q:** What happens if the total opening width is less than the calculated total door width? **A:** If the total opening width is less than the calculated total width (including gaps), the configuration will be unfeasible, and adjustments must be made either to the number of doors or the gap size. --- *Generated from [complete.tools/cabinet-door-calc](https://complete.tools/cabinet-door-calc)*