About VehicleInterior
A custom interior rarely goes wrong at the sewing machine or the heat gun. It goes wrong on the shopping list — ordering three metres of fabric when the job needed five, buying a tint film that turns out illegally dark once it’s on the glass, or guessing at how much foam a rebuilt cushion swallows. The craft is one thing; the numbers around it are another, and getting them wrong is expensive and slow to fix.
VehicleInterior is built to take that arithmetic off your bench. Instead of long articles you have to read end to end, the site is organized around a handful of small, single-purpose calculators, each aimed at one decision in an interior build. The Upholstery Fabric Calculator sums your panel areas, adds a waste allowance, and converts that to the linear metres of fabric or vinyl to buy at your roll width — or the number of leather hides. The Carpet Area Calculatoradds up the footwells, tunnel, and cargo floor as rectangles so a moulded floor that’s anything but flat still gets enough carpet. The Seat Foam Calculator turns cushion dimensions into a foam volume in cubic metres and board-feet, and shows the finished mass at a density you choose. The Window Tint VLT Calculator multiplies a film’s VLT by the glass’s own VLT — because they combine as fractions — to reveal the true light transmission a tint meter reads. The Cargo Volume Calculator estimates a boot in litres and cubic feet with a shape factor for wheel wells and curved trim. And the Material Cost Estimator turns an area, a coverage figure, and a unit price into whole rolls or tins to buy and the total spend.
Every number these tools produce comes from a plain, stated method: length times width for area, area over roll width for a linear length, volume times density for mass, fractions multiplied for combined VLT, a box volume trimmed by a shape factor for cargo space. Nothing is a black box. Where a figure rests on a rule of thumb — a typical waste allowance, an average leather hide size, a shape factor for a boot — the tool says so and lets you change it.
Beyond the calculators, the blog and learnsection cover upholstery materials, foam and comfort, carpet and trim, tint and glass, and interior customization — including the reasoning behind the numbers the tools produce. The museumis a separate, browsable collection with every entry, image, and fact drawn from Wikipedia and Wikimedia Commons; it’s there for the pleasure of looking, not as a build reference.
A few things worth stating plainly. VehicleInterior is an independent site, not a trim shop, installer, or materials retailer, and not affiliated with any brand, manufacturer, or standards body it mentions. It is supported by advertising, which is how the tools stay free with no account required. Every result — a fabric length, a carpet area, a foam mass, a combined VLT, a cargo volume, a materials cost — is a general estimate for planning, not professional automotive, installation, or legal advice. Window-tint limits in particular vary by country and by state and change over time, so always confirm the rule that applies where you drive. If something looks off in a tool or an article, or there’s a calculator you wish existed, the contact page is the place to say so.