Whole rolls
A wallpaper roll calculator for your Shopify store.
Shoppers enter the wall width and height. Spark Kit works out how many strips the wall needs, how many strips each roll gives, and the rolls to buy.
A real Spark Kit calculator with a sample price. Type in your own numbers.
Rolls are not square feet.
Wallpaper does not divide neatly by area: a roll gives a whole number of full-height strips, and the leftover is wasted. Shoppers who divide the wall area by the roll area order too few, and your support inbox fills up with "how many rolls do I need?" A calculator that works in strips gets it right.
Worked out the way paper hangs
Strips across the wall, strips per roll from the wall height, then whole rolls. The shopper sees the answer, not the working.
Your roll size, set once
Roll width and length are numbers on the calculator, so it fits your products rather than a generic roll.
Rolls straight to the cart
The rolls needed go into the cart at your roll price, so the quote and the checkout agree.
Live on your store in an afternoon.
Install it, set up your calculator, and place it on your product page. No code, no developer, no waiting on a build.
- 01
Add it from the App Store
Install Spark Kit on your Shopify store and start your free trial. Everything runs inside your Shopify admin, nothing else to host or maintain.
- 02
Build your calculator
Spark Kit reads your products and builds a calculator for each kind you sell by size. Ask for any change in plain words and check it in a live preview.
- 03
Place it and go live
Drop the calculator onto your product page in the theme editor. Shoppers enter their dimensions, see a live price, and add the right amount to cart.
Wallpaper calculator questions
Can I change the roll size?
Yes. Roll width and length are set on the calculator and can be changed any time. Products with a different roll size can have their own calculator.
Does the price match checkout?
The price always comes from your own product price in Shopify, so the total a shopper sees on the page is exactly what they pay at checkout. Change your price in Shopify and the calculator follows.
Can I rename the fields?
Yes. Every label a shopper sees can be reworded in the editor, so it reads the way you talk about your products.
Will it work with my theme?
Yes, on any current Shopify theme that supports app blocks (every Online Store 2.0 theme, including Dawn). You add the calculator to your product page from the theme editor, with no code to paste in.
What does it cost?
Spark Kit is $14.99 per month with a free trial, and you can cancel any time. One subscription covers every calculator on your store.
More questions? Read the full FAQ, or try every calculator.
Calculators for other trades
Start selling by measurement on Shopify.
Add Spark Kit to your store and set up your first calculator in minutes. Free trial, no code required.