🛒 Augment Shopping

Cost-Per-Unit Calculator Overlaid on Grocery Items

Overlay cost-per-unit labels on grocery and retail listings so you instantly know which option is actually cheaper.

Last updated March 1, 2026

Install Free for Chrome

Cancel anytime

What you get

  • Parse pack sizes and units (oz, ml, count)
  • Normalize pricing into a single comparable metric
  • Highlight the best value option automatically
  • Remove mental math errors from shopping decisions

How it works

The workflow, in plain English

Before: “24-pack, 12oz cans” for $18 vs “1.5L bottle” for $3. Which is cheaper per ounce? You do mental math. You get it wrong. You overpay.

Step-by-step

  1. Open a grocery or retail product listing page.
  2. Ask dassi to compute and overlay cost-per-unit.
  3. Review any items with ambiguous sizing.
  4. Sort or filter by best value if desired.

Example prompts to try

  • “Show cost per ounce for these items and highlight the cheapest.”
  • “Normalize to cost per 100g.”
  • “Exclude items with shipping fees.”

Tips for better results

  • Be specific about what you want injected into the page (buttons, filters, a panel, a summary, etc.).
  • If the page has multiple sections, tell dassi exactly what to focus on (e.g., “the transactions table” or “the diff for file X”).
  • Prefer safe workflows first: draft, summarize, label, and prepare — then take actions (submit, purchase) only after review.

Works-with pages

Role playbooks

Frequently Asked Questions

What if pack sizes are inconsistent?

That’s common. Ask dassi to use a consistent unit (e.g., oz, ml, count) and to ignore items that can’t be normalized confidently.

Does it handle subscriptions or bulk pricing?

If pricing details are visible, it can include them. For complex promos, you may need to specify the rules.

Can it compare across different sites?

Yes — pair this with competitor price comparison to evaluate both price level and unit economics.

Try this workflow in 2 minutes

Install dassi, open the page you’re working on, and describe the outcome you want. No scripts, no integrations.

Install Free for Chrome

Cancel anytime