Find the most cost-effective way to ship your item. We compare boxes, poly mailers, and specialty packaging from our curated database to save you money.
To ensure safety and accurate pricing, we filter packaging options based on the physical properties of your item.
Soft / Flexible
✓ Poly Mailers • ✓ Bubble Mailers • ✓ Boxes
We compare all options. Dimensions are treated as flexible/compressible.
Pre-Boxed / Rigid
✓ Poly Mailers • ✓ Boxes
Enables "Box in a Bag" logic. We calculate fitting your item inside a poly mailer to reduce DIM weight.
Semi-Fragile
✕ Poly Mailers • ✓ Bubble Mailers • ✓ Boxes
Thin poly mailers are disabled to prevent damage.
Fragile / Breakable
✕ Mailers • ✓ Rigid Boxes Only
We only search rigid shipping cartons to ensure protection.
Why I built this: I'm a developer and occasional reseller. I was looking to optimize my shipping costs and built this calculator to do the math for me.
Privacy Promise: This tool runs entirely in your browser session. I do not sell your data, track your location history, or spam you.
How it's free: Certain links provided are affiliate links, I earn a small commission at no extra cost to you. This helps cover the server costs.
Rates are estimates based on USPS Commercial Ground Advantage, UPS Ground with Small Business Everyday Savings, and USPS Flat Rate Prices. You may be able to find more deeply discounted shipping rates by purchasing labels through PirateShip.