BundleUp 
Cartify 
Vouch Free tools for Shopify stores.
Four calculators for the numbers behind a bigger order: your free shipping threshold, quantity break and bundle prices, and the ROAS your ads need to break even. No signup, and everything runs in your browser.
Calculator
Free shipping threshold calculator
Pick a free shipping threshold from your average order, shipping cost and margin, and see how many orders must grow to it before free shipping pays for itself.
You enter
- Average order value
- Average shipping cost per order
- Gross margin %
- Typical item price
- Optional: a threshold to test
You get
- A suggested threshold range (rule of thumb: 15-30% above average order value)
- A starting threshold about one item above your average order
- The extra order value needed to cover shipping
- The break-even share of free-shipping orders that must grow to the threshold
Calculator
Quantity break calculator
Price quantity discounts like buy 2 and save 10%. See each tier's unit price, total, profit and margin, rounded the way Shopify rounds percentage discounts.
You enter
- Unit price
- Unit cost
- Up to 4 tiers: quantity and a discount (% off each unit, an amount off each unit, or a set price for the tier)
You get
- Price per unit for each tier
- Order total
- Profit per order and margin %
- How many units a shopper must buy at that tier's price to beat the profit of one full-price unit
Calculator
Break-even ROAS calculator
Work out the ROAS your ads need to break even, the most you can pay in ads per order, and how both change if your average order grows.
You enter
- Average order value
- Gross margin %
- Other costs per order (shipping you pay, packaging, payment fees)
- Scenario: average order growth %
You get
- Break-even ROAS
- Max CAC per order (the most you can pay in ads for one order)
- Max ad spend as a share of revenue
- The same numbers if your average order grows by X%
Calculator
Bundle price calculator
Price a bundle of different products from their prices and costs. Set a discount or a target margin and see the bundle price, the saving and the profit.
You enter
- Up to 5 products: price and cost
- Either a discount % or a target margin %
You get
- Full price and total cost
- Bundle price and the shopper's saving
- Profit and margin per bundle
- How many bundles match the profit of one full-price set
- In target-margin mode: the whole-percent discount to set and what Shopify charges
How these tools work
Plain math, shown in full.
Each calculator shows its formulas and a worked example you can check by hand. Built by the team behind BundleUp, Cartify, Vouch and ExtraSale.
- 01
Your numbers only
Every result comes from what you type in. Where a tool uses a rule of thumb, it says so.
- 02
Nothing leaves your browser
No signup, no email, no tracking. The math runs on your device.
- 03
Shareable links
The address keeps your inputs, so you can bookmark a result or send it to a partner.
- 04
Shopify rounding
Percentage discounts are rounded the way Shopify rounds them, so totals match the cart.