About Blindset

Buying window treatments sounds simple until you’re standing at a window with a tape measure, wondering whether to mount the blind inside the recess or over it, how much curtain fabric a pair really needs, or whether “room-darkening” is dark enough for a nursery. The ideas aren’t complicated — it’s the measuring, the arithmetic, and the jargon that trip people up. Blindset is built to get you past those moments so you can choose and fit with confidence.

Rather than long essays you have to wade through, the site is a set of small, single-purpose calculators, each aimed at one real task. The Blind & Shade Size Calculator turns a measured opening into the size to order for an inside or outside mount. The Curtain Fabric Calculator works out how many fabric drops and how much yardage a pair of curtains needs. The Window Treatment Cost Estimator budgets a whole home by window count. The Light-Blocking Opacity Selector matches a room to the right opacity, the Slat Count & Ladder Spacing Calculator estimates the slats and pitch of a venetian blind, and the Blind Cord Safety Calculatorchecks whether a cord is within a child’s reach.

Alongside the calculators, the blog and learnsection explain the reasoning behind the tools — how to measure a window properly, when an inside mount beats an outside mount, how the types of blinds and shades differ, what separates blackout from light-filtering fabric, and how to keep blinds clean and child-safe. Every explanation is written from scratch and worked through with real numbers.

A few things worth stating plainly. Blindset is independent and not affiliated with any manufacturer, retailer, or brand. It is supported by advertising and by affiliate links, which is how the tools stay free with no account required. The calculators are planning and checking aids: they show their working and round for readability, but every manufacturer has its own deduction and sizing charts, so confirm the numbers against the specific product before you order — especially for custom, non-returnable blinds. If a tool looks wrong, or there’s a calculator you wish existed, the contact page is the place to tell us.