Contact

SizeCalc

In App Store review

Sell made to measure, priced to the centimetre.

Customers enter width × height and see their price instantly. Shopify recalculates it in the cart and checks it again at checkout, so the amount on the order matches the size.

Get early access →Setup guide

Free plan · Pro $19.99/mo · Free on development stores

Roller blind

Made to measure

$45 / m²

1.20 × 1.50 m = 1.80 m²

$81.00

Same price in cart and at checkout

Made forBlindsCurtainsGlassSignsFabricWallpaperPrints
How it works

Live in three steps.

  1. 01

    Add the block

    Install SizeCalc and add the size calculator block to your product template in the theme editor. No code.

  2. 02

    Set the rate

    Open a product in the app: choose a rate per m² or paste a width × height grid from Excel or Google Sheets.

  3. 03

    Start selling

    Customers enter their size and see the price live. Shopify recalculates it in the cart and checks it at checkout.

Features

Everything it does, nothing it doesn't.

Rate per m² or a price grid

Charge by area, or paste a width × height table straight from your spreadsheet. The nearest larger size is used.

Minimums, fees and steps

Set a minimum charge, a setup fee, size steps and rounding, plus the smallest and largest size you make.

Live price on the product page

The price updates as customers type, in centimetres, millimetres or inches.

Checkout guard

Items with a missing, out-of-range or tampered size are stopped at checkout before the order is placed.

Sizes on every order

Width and height appear on the cart line and the order, ready for production.

Theme-friendly

An app block for Dawn, Horizon and other Online Store 2.0 themes. Discount codes apply to the calculated price.

Pricing

Start free. Upgrade when it pays.

Free

$0

For trying it on one product

  • 1 product priced by size
  • Rate per m² and price grids
  • Checkout guard
  • Email support

Pro

14-day free trial

$19.99

per month

  • Unlimited products
  • Everything in Free
  • Email support

Billed through Shopify. Cancel any time from your Shopify admin.

FAQ

Questions, answered.

Something else? support@storewrights.com

Does it work on every Shopify plan?

Yes. SizeCalc uses Shopify Functions that are available on all plans, and an app block that works with Online Store 2.0 themes such as Dawn and Horizon.

Can a customer change the price in the cart?

No. The price is calculated by Shopify from the size on the cart line, not taken from the browser. If the size is missing or outside your limits, checkout stops the order.

Do I need to edit theme code?

No. You add the size calculator block in the theme editor. Removing the app removes the block.

Where do I see the customer's size?

On the order, as Width and Height on the line item, the same way you see variant options.

Can I use my existing price table?

Yes. Copy the table from Excel or Google Sheets with widths across the top and heights down the side, and paste it into the app.