Free packaging and shipping tools
Packaging tools
Free calculators and reference charts that help you pick the right box, board grade and quantity, and cut what you pay to ship it. Use the calculators and buying tools free, with no account needed.
Quick check: what will the carrier bill for your box?
01Calculators
Dimensional weight calculator
See what a carrier will actually bill you for before you buy the box.
12×10×8 in ÷ 139 → 7 lb dim Open →Box size finder
Enter your item and get the right box size, snapped to real stock sizes.
item 9×6×3 in → 10×8×4 stock box Open →Packaging quantity calculator
Estimate the tape, stretch film and void fill you'll need, and how much to reorder.
500 boxes, H-seal → ~9 rolls (110 yd) Open →AI packaging finder
Describe the item and shipping job, then compare packaging formats and exact product routes.
buyer job + dimensions → verified shortlist Open →02Size charts and references
Shipping box size chart
Standard corrugated box sizes and what fits each one.
Open →Bubble mailer size chart
The #000–#7 mailer decoder plus poly mailer sizes.
Open →Box strength guide (ECT vs Mullen)
Which board rating you need for the weight you're shipping.
Open →03Guides
Freight Reality Index
Compare parcel and LTL across 957 historical May 2026 quote scenarios. Includes two worked examples, a reusable chart and downloadable data.
Explore the benchmark →Why packaging shipping costs so much
The real reasons supply shipping is expensive, and how to pay less.
Open →Best Uline alternatives
How Packrift compares for boxes, mailers, poly bags, tape, and wrap.
Open →Agentic Packaging Commerce Index
See Packrift's 426-query Shopify Catalog benchmark, product-card findings, and buyer fit rules.
Read the index →Q3 2026 packaging price trends
Use current BLS producer-price data to plan corrugated, paper-bag, and plastic-bag purchases.
Read the update →Using the tools together
Most oversized shipping bills start with an oversized box. Begin with the box size finder to match a box's internal dimensions to what you're actually shipping, then run that box through the dimensional weight calculator to see whether a carrier would bill its real weight or its dimensional weight. When dim weight is the number being billed, a box even one stock size smaller changes what every single shipment costs to send. It's the check most shippers skip.
If you're stocking a pack station rather than planning one shipment, the packaging quantity calculator estimates how much tape, stretch film, and void fill your order volume actually consumes, so you can reorder on a schedule instead of running out mid-week. The box size chart and mailer size chart are the fast references when you already know the item, and the ECT guide keeps you from paying for heavier board than the load needs.
Common questions
Are these tools free?
Yes. Every calculator, chart, and guide on this page is free to use, with no usage limits. They're working references we publish for anyone who ships, whether or not you buy your packaging from Packrift.
Do I need an account?
No account, email address or download is required to use these tools. Buying tools request current product pricing and availability. Adding to cart sends the selected products and quantities to Shopify. Analytics follows the store consent settings.
Can I put these tools on my site?
Link to them rather than framing them: the store's pages block display inside other sites. Each calculator page has a copy-ready link snippet with credit to Packrift, free to use on your site or internal wiki.
How accurate are the estimates?
The calculators use the same published formulas carriers use, including the 139 dimensional divisor for UPS and FedEx daily rates, plus standard yield assumptions for tape, film, and void fill. Treat results as close planning estimates, and confirm final numbers against your carrier agreement or a bulk quote.