Free interior calculators

Every interior quotation starts with the same sums: areas, running feet, boards, litres, tax and stages. These twelve calculators do them the way interior firms quote, with your own rates and no made-up averages. Free, with no sign-up, and nothing you type leaves your browser.

• Interior design cost calculator Budget a whole home room by room from areas and your own rates.
• Modular kitchen calculator Running feet of base and wall units and countertop area for any layout.
• Wardrobe cost calculator Front area, lofts and shutter count for every wardrobe, priced per sq ft.
• False ceiling calculator Ceiling area, gypsum board count and cove light running length for each room.
• Painting cost calculator Paintable wall and ceiling area, litres of paint and cost per sq ft.
• Tile calculator Tiles and boxes needed for a floor or wall, with extra for cuts.
• Room area (sq ft) calculator Area and perimeter of each room in feet and inches or in metres.
• GST and VAT calculator Add or remove GST, IGST or Gulf VAT, with CGST and SGST shown.
• Payment schedule calculator Split a quotation into advance and milestone stages that always add up exactly.
• Amount in words converter Write any amount in words, in lakh and crore or in international millions.
• Plywood sheet calculator Plywood sheets needed for a whole cutting list, with cutting waste and cost.
• Margin and markup calculator The rate to quote from your cost, by margin or by markup percentage.

Need the whole quotation, not just the sums? Use the free interior quotation template, or try Interior Quote to send a branded quotation your client can accept.