Whole cans
A paint coverage calculator for your Shopify store.
Shoppers enter the area to paint and the number of coats. Spark Kit divides by what one can covers and rounds up to whole cans.
A real Spark Kit calculator with a sample price. Type in your own numbers.
"How many cans do I need?" is a question you can answer on the page.
Coverage is printed on the tin, but shoppers still have to multiply by coats, divide by coverage, and round up. Most guess. A calculator on the product page answers the question the moment they ask it, and sells the second can they would otherwise have forgotten.
Area and coats in
The shopper enters the area and picks one, two, or three coats. The can count updates as they go.
Your coverage per can
Set what one can covers for your product. Different sizes or finishes can each have their own calculator.
Whole cans to the cart
The calculator rounds up and adds that many cans at your price.
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
Describe your product and get a calculator built for you, or pick a template for your trade. Set your pricing and choose which products it shows on. A live preview tracks every change.
- 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.
Paint calculator questions
Where does the coverage number come from?
You set it: the area one can covers, as printed on your product. It lives on the calculator and can be changed any time.
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 use square metres?
Yes. You choose the unit when you set up the calculator.
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.