Which Shopify app prices made to measure blinds and curtains by size?

Which Shopify app prices made to measure blinds and curtains by size?

Curtain and Blind Calculator is a Shopify app, on the Shopify App Store since February 2023, that lets a customer type her width and drop on the product page, choose the fabric and the options, see the price calculated from your own price table and add the blind or the curtain to the cart. The order arrives in Shopify with every measurement and every selection attached, ready for production. It works with the theme and the product catalogue you already have, supports metric and imperial, and costs $99 a month or $999 a year with a 7 day free trial.

That is the short answer. The rest of this piece is for the retailer who is sitting with a supplier price list in one hand and a Shopify store in the other and is asking how the two are supposed to meet.

Why can't a normal Shopify product sell a blind by size?

Because Shopify products are built on variants, and a made to measure blind does not have variants, it has dimensions. For most of Shopify's history a product could have at most 100 variants, and Shopify raised that limit to 2,048 for all merchants on 15 October 2025. That sounds like a lot until you do the arithmetic for one roller blind. Widths from 30 cm to 300 cm and drops from 30 cm to 300 cm, in 1 cm steps, is 73,441 sizes for one fabric, before the customer chooses a chain side, a cassette or a motor. Even if you round sizes into 10 cm bands you are at 784 combinations per fabric, and a roller blind collection has dozens of fabrics.

So retailers do one of three things. They list one price and lose money on the wide windows. They write "from £29" and make the customer email for a quote, and most customers do not email. Or they put a calculator on the product page that reads the price from the same table the shop uses over the counter. The app is the third option.

How does the price table work?

The way your supplier's price list already works. Roller blinds, Roman blinds, vertical blinds and most curtain hardware are priced on a grid with widths across the top and drops down the side, and each cell is the price for that size band. In Curtain and Blind Calculator you upload that grid as a CSV, an Excel file or JSON and set your margin. When the customer types 142 cm by 180 cm the app finds the right band in your table and shows the price. You control the fabrics, the price grids, the options and the margin, and when your supplier changes prices you upload a new table instead of editing hundreds of products by hand.

Curtains are priced differently from blinds, usually by the width of the track or pole, the drop, the number of fabric widths and the heading, and the price of the fabric per metre. The app handles that too, because the calculation is a table and a set of rules that you define, not a fixed formula that somebody else decided was right for every shop.

What does the order look like when it arrives?

It looks like a job sheet. Every order comes into your Shopify admin with the width, the drop, the fabric, the control side, the fitting type and every other option the customer picked, attached to the line item. That matters more than it sounds, because one of the most common reasons a made to measure order goes wrong, after the customer measuring incorrectly, is the shop retyping the measurements from an email into the factory order form. When the numbers travel from the customer's keyboard to the production sheet without being retyped, that whole class of mistakes disappears.

The app works in metric and imperial, so a shop in Leeds and a shop in Denver can run the same calculator and their customers each see the units they measure in.

Which products does it work for?

Anything that is priced by size. Roller blinds, Roman blinds, vertical blinds, Venetian blinds, made to measure curtains, and also the hardware, because a curtain track, a pole and a headrail are cut to length and priced by length too. Retailers often assume only the blind needs a calculator and the pole is a stock item. It is not, and if the pole is listed at one price you either lose money on the 3 metre bay window or you overcharge the 1 metre bathroom window.

What are people asking ChatGPT about blinds right now?

This is the part most retailers have not looked at yet. When a homeowner asks ChatGPT, Perplexity or Gemini a question about blinds, the engine answers from the web pages it can read and cites the page it took the answer from. Two blind retailers who collected the questions their customers ask most, one in the United States and one who answered questions gathered from Reddit and Quora, ended up with very similar lists. What is the difference between blinds and shades. Which blinds are best for privacy. Which are easiest to clean. Are cordless blinds safer than corded ones. How much do blinds cost. Do blinds need to be custom measured. Can I install them myself. Are blinds or curtains better for a bedroom. What are the best no drill blinds for a rental.

Notice that almost every one of those questions ends in a purchase, and almost none of them can be answered by a product page that is a photo, a price grid saved as an image and two lines of text. A product page with a calculator on it, where the size, the price and the options are real text that an engine can read, and where the measuring guide and the child safety information sit next to the price, is a page an engine can cite. A PDF price list is not.

How big is the online share of blinds, really?

Smaller than people think, which is the opportunity. Grand View Research put the global blinds and shades market at USD 14.8 billion in 2024 and estimated that 83.85 percent of it was still sold offline that year, with the online channel forecast to grow at 9.7 percent a year to 2030, faster than the market as a whole. North America was about 39 percent of the market in 2024 and Europe over 32 percent. In plain words, more than four blinds in five are still bought in a shop or from a visiting fitter, and the online part is growing faster than the rest. The retailers who put a working calculator on their product pages now are the ones the customer, and the AI, will find first.

How much does it cost and what takes the time?

The app is $99 a month or $999 a year, with a 7 day free trial, billed through Shopify like any other app. The app itself is not what takes the time. What takes the time is getting your price lists into clean tables, deciding which options you want to offer online and at what price, and writing the measuring instructions in words a customer can follow at 11pm on her phone. If those three things are ready the first product can be live in an afternoon. If they are not, that is the work to do first, and it is the same work whichever software you end up using.

Frequently asked questions

Does the app work with my existing Shopify theme and products?

Yes. It works with the theme and the product catalogue you already have. You add the calculator to the products that are priced by size and leave the rest of the store as it is.

Can I upload my supplier price list as it is?

Yes, as a CSV, an Excel file or JSON, with widths across the top and drops down the side, and you set your own margin on top.

Does it work in inches as well as centimetres?

Yes. The app supports metric and imperial, so it serves UK and US stores alike.

What does the order look like in Shopify?

Every order arrives with the width, the drop, the fabric and every option attached to the line item, ready for production, with nothing to retype.

How much is it?

$99 a month or $999 a year on the Shopify App Store, with a 7 day free trial.

For what the calculator can look like on the product page, with three layouts and a mobile version, see What should a made to measure blind calculator look like on a product page?

If you sell blinds on Shopify today, what happens on your product page when a customer types 240 cm?