Whole bags
A mulch, soil, and gravel calculator for your Shopify store.
Shoppers enter the length, width, and depth of the bed. Spark Kit turns that into a volume and the whole bags needed to fill it.
A real Spark Kit calculator with a sample price. Type in your own numbers.
Cubic feet are hard to picture.
A shopper knows their bed is 10 by 6 feet and wants 3 inches of mulch. Turning that into bags means mixing feet and inches and dividing by what a bag holds. It is the kind of math people put off, and a product page that does it for them is the one they buy from.
Length, width, depth in
Depth in inches, the bed in feet, and the calculator converts between them so the shopper does not have to.
Your bag size
Set what one bag holds. Bulk bags and small bags can each have their own calculator.
Bags to the cart
Rounded up to whole bags and added to the cart 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
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.
Mulch, soil, and gravel calculator questions
Can shoppers enter depth in inches and the bed in feet?
Yes. The example on this page does exactly that, and you can rename or change the fields to suit your products.
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 sell by the cubic yard instead of by the bag?
Yes. Spark Kit can sell whole units of any size, so a unit can be a bag, a tote, or a cubic yard. You set what one unit holds.
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.