Fyresite Forward
Posts
🤩 The Custom Calculator Your Shopify Store Needs

🤩 The Custom Calculator Your Shopify Store Needs

If you sell by the roll or box, a custom product builder is your secret weapon. Set up the calculator today.

Taylor Simmons
December 09, 2025

Good morning!

If you sell materials like flooring, turf, wallpaper, or fencing, you know the pain of translating a customer's project dimensions into the correct number of product units. Manual calculations lead to friction, customer confusion, and preventable returns.

Good news! You can now use a custom product builder on your Shopify store to automate complex calculations and let customers instantly determine exactly what they need based on their square footage.

Looking for your perfect Shopify partner? Schedule your free Fyresite consultation.

📐 The Smart Sell: Calculate Units by Dimensions

Shopify's default setup is great for fixed quantities, but not dynamic calculations (like Length x Width). This is where third-party product builder apps step in.

Here is the simple, three-step process to set this up using a formula-based custom product app:

Step	Action	Description
1. Create Inputs	Add fields for Length and Width.	Customers input their project dimensions (e.g., in feet or meters).
2. Define Formula	Use the app's formula builder.	Example for flooring: `(Length × Width) / Coverage per Box`.
3. Apply Logic	Enable rounding and waste allowance.	Ensure the quantity is automatically rounded up to the nearest whole unit (box/roll) and optionally includes a waste percentage (e.g., 10%).

💡 Example: Selling by the Box

If you sell a box of tiles that covers 24.3 sq. ft., the formula ensures the customer doesn't order a partial box. The app calculates the total required area, divides it by your unit coverage, and makes sure they order enough!

Amount Needed = Length * Width / 24.3

👀 See It In Action

Applied Coverings is a Fyresite client that sells wallpaper and murals. One of their big asks? To create a custom product builder that would allow customers to buy wallpaper based on their wall dimensions. Here’s how it looks:

Custom Product Builder for Square Footage for Applied Coverings

✨ Key Benefits for Your Business

This automation is not just a convenience—it's a critical tool for scaling your sales:

✅ Higher Conversions: Customers stay on your site; no need for external calculators.
✅ Fewer Returns: Automated rounding and waste allowance ensures customers order the correct amount.
✅ Improved AOV: Transparent, accurate ordering often results in a slightly higher Average Order Value.

Ready to stop manually calculating and start selling smarter?

Fyresite can help. Claim your free consultation with the Fyresite team to learn more.