Multibox Bench / Free browser tool

More boxes.Show the unit cost.

See the effective cost per unit from the buy-some-get-some terms you enter.

Calculate my multibox offer ↗See the method behind it

For buyers comparing a multi-box promotion. Published by Steralis Labs; commercial interest disclosed.

SEO Multibox Bench: original illustration of its input fields — Illustrative interface · example values are hypothetical

Ready to useNo account or purchase required

Visible workingMethod, example and limits included

Your browserEntries stay in this page

One focused task

From a question to a clearer record.

Start with the exact inputs

Multiply paid boxes by price per paid box. Add paid and included boxes to calculate boxes received, then multiply by units per box. Divide total price by total received units.

Review a concrete example

A hypothetical buy-two-get-one offer at $25 per paid box and 50 units per box costs $50 for 150 units before other charges.

Keep the boundary visible

This does not apply promotions, stack discounts, determine eligibility or verify an offer.

Useful without a purchase

Built around your next step.

This publication serves buyers comparing a multi-box promotion. The tool is available without an account, signup or product purchase. Its output is based on the information you enter; it is not an independent product test.

Use the worksheet or calculator ↗