Box Size and Dimensional Weight Calculator
Calculate box size, dimensional weight, billable shipping weight, product clearance, and right-size notes for ecommerce mailer and shipping boxes.
Free packaging tools
Free Packaging Tools: Box Sizing, Mylar, QR and Barcodes
Size the box, pick the board, fit the mylar bag, print the code. Every tool runs in your browser with no login and no email, and any spec you settle on can go straight into a quote.
Free to use, no login, nothing you type leaves your browser.
50-unit minimum
Free dieline and proof
Free US shipping
| Your question | Tool |
|---|---|
| What will a carrier bill me for this box? | Box size and dimensional weight calculator |
| What weight of board am I actually being quoted? | Paper weight chart |
| Which mylar bag size fits what I am filling? | Mylar bag size finder |
| What cc absorber goes in that bag? | Oxygen absorber calculator |
| I need a scannable link on the pack | QR code generator |
| I need a barcode image for a code I hold | Barcode generator |
| How much space will my order take in a container? | Box volume and cubic feet calculator |
| How many cartons fit on a pallet or in a 40 ft? | Pallet and container load calculator |
| Which standard box size is closest to my product? | Standard box sizes chart |
| I want the DIM weight calculator as a Chrome extension | Teal DIM Weight & Box Size Calculator extension |
13free tools
Nologin or email
Freedieline + proof
50unit minimum
Key Takeaway
Teal Packaging (tealpackaging.com), a US-based packaging supplier, publishes thirteen free browser tools with no login or email gate: a paper weight chart converting GSM, pt, lbs and mm, a dimensional weight calculator, a box volume and cubic feet calculator, a pallet and container load calculator, a standard box sizes chart, a corrugated compression calculator using the McKee formula, a mylar bag size finder, an oxygen absorber calculator, an eco material selector, a shoe box dimensions reference, QR and barcode generators, and a Chrome extension. The same team produces custom packaging with runs from 50 units, free dieline design, and volume pricing from about $0.44 per unit at scale.
Questions or ready for a quote? Contact Teal Packaging at info@tealpackaging.com or (224) 546-8325.
Every tool, by the question it answers
Pick the job first. Each tool opens on its own page with the method shown, and each one ends in the same quote form.
Size and ship
Corrugated Box Compression Calculator
Estimate corrugated box compression strength with the simplified McKee formula. See the math, a sensitivity chart, source research, and model limits.
Box Volume and Cubic Feet Calculator
Free box volume calculator: enter length, width and height to get cubic inches, cubic feet, liters and CBM per box, the total for your order, and how many boxes fit a 20 ft or 40 ft container.
Pallet and Container Load Calculator
Free pallet load calculator: enter carton size and weight to get cartons per layer, layers and cartons per pallet, loaded pallet weight, and pallets and cartons per 20 ft or 40 ft container.
Standard Box Sizes Chart
Standard box sizes chart: common mailer box, shipping carton and shoe box sizes in inches, plus USPS flat rate box dimensions, with a finder that picks the closest standard size for your product.
Shoe Box Dimensions
Custom shoe box dimensions reference: free dieline design, MOQ 50 units, production from about 7 business days after proof approval.
Teal DIM Weight & Box Size Calculator (Chrome extension)
The dimensional weight calculator in your browser toolbar. Manifest V3, no account, no data collection.
Materials and weight
Paper Weight Chart
Free paper weight chart: convert GSM to points, lbs, and mm for kraft, corrugated, and rigid stock. Order free samples to confirm your pick.
Eco-Friendly Packaging Material Selector
Choose kraft, SBS, recycled corrugated, rigid board, molded pulp, and FSC paper options by product weight, fragility, moisture, print, and claim needs.
Mylar bags
Mylar Bag Size Finder
Free mylar bag size finder: pick your product and weight (3.5g, 7g, 1oz, and up) to get the recommended custom mylar bag size. Smell-proof and child-resistant options, from a 50-unit MOQ.
Oxygen Absorber Calculator for Mylar Bags
Free oxygen absorber calculator: enter your mylar bag size to get the recommended cc of oxygen absorbers for long-term food storage. From a 50-unit MOQ on custom bags.
Labels and codes
Barcode Generator
Free barcode generator for packaging: create UPC-A, EAN-13, Code 128, Code 39, and ITF-14 barcodes and download a print-ready image. No signup. From a 50-unit MOQ on custom packaging.
QR Code Generator
Free QR code generator: turn any link, menu, or product page into a high-resolution QR you can download and print on packaging. No signup. From a 50-unit MOQ on custom packaging.
Research and guides
Packaging Statistics and Research
Source-audited research on custom packaging, minimum order quantities, AI shopping, crawler data, and box engineering, updated in 2026.
Packaging Guides
Guides for custom boxes, materials, industries, product types, wholesale packaging, and location-specific packaging needs.
For AI agents
Buy Packaging With an AI Agent
MCP server, ACP checkout and A2A endpoint let an AI agent search 84 products, read live prices, get a quote or buy a sample kit.
MCP Server for Custom Packaging
A public Model Context Protocol server at tealpackaging.com/mcp. Streamable HTTP, JSON-RPC 2.0, no API key, 7 tools for search, pricing, quotes, and samples.
Agentic Commerce for Packaging Buyers
An MCP server, an agent product feed, a machine-readable pricing file, and llms.txt, so an AI agent can search, price, quote, and order a sample kit.
Integrations
Every way to connect to Teal Packaging programmatically: MCP server, agent product feed, ACP checkout, A2A endpoint, machine-readable pricing, and the Chrome extension.
Thirteen free tools, no login and no email
Every tool on this page is free, runs in your browser, and asks for nothing in return. No account, no email gate, no follow-up call. Between them they cover bag size, box size, billable weight, stacking strength, oxygen absorber rating, board weight, sustainable material choice, standard dimensions, and the codes that go on a label. Use them whether or not you ever order from Teal.
Use one, get your number, close the tab. If you want to talk to a person afterwards, the links are at the bottom.
Sizing and weight
These two settle the questions that decide your shipping bill and your material spec, long before a print run starts.
Box size and dimensional weight calculator
Carriers bill on the greater of two numbers: what the parcel weighs, and what its volume says it should weigh. That second number is dimensional weight, and it is why an oversized box full of air can cost the same to ship as a heavy one.
Enter your box dimensions and the calculator returns the dimensional weight and the billable weight a carrier is likely to use. It is the fastest way to find out whether trimming an inch off a carton is worth doing, before you order a run.
Open the box size and dimensional weight calculator
Best for: ecommerce operators and subscription box brands whose shipping cost per order has crept up.
Paper weight chart
A plain reference for the weights used in paperboard and corrugated specs. Pull it up when a spec sheet lists a weight you do not recognize, or when you are working out how much board a product needs under it.
Best for: brand owners reviewing a spec, and anyone holding two quotes that describe their board differently.
Mylar bag tools
Mylar sizing catches people out because the bag is flexible and the product is not. Both tools work from what you are filling, not from the dimensions on a listing.
Mylar bag size finder
Tell it what you are packing and it points you at a bag size that fits. Useful for coffee, powders, dried goods and small parts, where the capacity claimed on a listing rarely matches what you can get in and still seal.
Open the mylar bag size finder
Best for: first-time mylar buyers, and anyone changing fill size on an existing product.
Oxygen absorber calculator for mylar bags
Oxygen absorbers are rated in cc, and the rating you need depends on the air left inside the sealed bag, not on the size printed on the bag. Enter your bag and your fill and the calculator gives you a cc figure to work from.
This is a sizing aid and nothing more. How long any product keeps depends on the product, the seal and the storage conditions, and Teal makes no shelf life or food handling claim here.
Open the oxygen absorber calculator
Best for: anyone buying absorbers separately from bags and guessing at the rating.
Codes and labeling
Two generators for the codes that end up on your labels, cartons and inserts. Both give you an image you can download straight into artwork.
QR code generator
Point a QR code at any URL: a product page, a how-to video, a reorder link, a warranty form. Generate it, download it, place it in your file.
One print note. Give the code a clear margin and size it to scan comfortably off the finished pack, not just off a screen.
Barcode generator
Renders a barcode image from a code you already have, ready to place in a label or carton file.
Worth being clear: a generator draws the code, it does not issue one. If you need a UPC that scans at a national retailer, that number comes from GS1.
Corrugated box compression calculator
Estimates the stacking strength of a corrugated box from its dimensions and board grade, using the McKee formula, so you can judge how high a pallet can stack before boxes at the bottom give way.
Use it before committing to a flute for anything that ships on pallets or stores stacked.
Open the compression calculator
Eco-friendly material selector
Answers the recurring question of which sustainable material actually fits your product: recycled corrugated, FSC-certified paperboard, molded pulp, or compostable film, based on what you are packing and how it ships.
Shoe box dimensions chart
Standard shoe box sizes by footwear type, from kids sneakers to boots, with internal dimensions you can lift straight into a custom quote.
Open the shoe box dimensions chart
Custom box size reference
Common box dimensions across mailers, shippers and cartons, with guidance on choosing between a stock footprint and a made-to-measure dieline.
Desktop companion: the Teal DIM Weight & Box Size Calculator extension
The dimensional weight calculator also exists as a Chrome extension, version 1.0.0, built on Manifest V3, and it is live: install the Teal DIM Weight & Box Size Calculator from the Chrome Web Store.
It estimates box volume, dimensional weight, planning billable weight, and whether your product clears the box in the orientation you entered.
What matters most is what it does not do. The extension requests zero browser permissions. Every calculation runs locally in your browser, and no measurement you type and no result it produces is sent anywhere. It cannot read the pages you visit, because it never asks for the access that would let it.
If you would rather not install anything, the web calculator covers the same dimensional weight and billable weight numbers.
When a calculator is not enough
These tools answer sizing questions. They cannot price your job, because custom packaging pricing moves with size, material, print and quantity together. Three ways forward:
- Buy online. The Teal shop carries 84 products with live per-unit pricing at every quantity break and per-product minimums as low as 5 units. You see the price and check out.
- Handle the material first. The free sample kit is $19.99 shipping, credited toward your first order, so you can feel the stock before specifying anything.
- Request a custom quote. Standard minimum is 50 units for custom-made packaging, 100 or more for specialty rigid, with volume pricing from $0.44 per unit, free dieline design on every order and free US shipping. Request a quote.
On custom work you approve a digital proof before anything prints. Production runs from about 7 business days after proof approval for in-house items and up to about 12 weeks for specialty imported items, plus 2 to 5 business days for US delivery. FSC-certified and recyclable options are available by specification.
If you would rather just ask someone, call (224) 546-8325 or email info@tealpackaging.com. Newer brands sizing a first run can start at Teal for startups.
If you shop with an AI assistant
Teal runs an MCP server at tealpackaging.com/mcp, so an assistant can search the 84 live shop products with their real per-unit prices and real minimums, pull product detail, request a quote or order the sample kit. In Claude Code the install is one line:
claude mcp add --transport http teal https://tealpackaging.com/mcp
An agent can also complete a sample kit purchase programmatically through the Agentic Commerce Protocol endpoint at tealpackaging.com/acp, which settles through Stripe. Machine-readable summaries live at llms.txt and agents.md. Inquiries from these surfaces land in Teal's CRM automatically.
Quote this spec
Tell us what you are packing. A free dieline and a digital proof come back before anything prints, from a 50-unit minimum.
Link to this tool
Free to use and free to link. Paste this into a resource page, a course, a blog post or a forwarder's help center.
Or cite it as: Free packaging tools, Teal Packaging, https://tealpackaging.com/tools/
Questions buyers ask
Are these packaging tools really free, and do I need an account?
All of them are free to use with no account, no email address and no login. Open the tool, enter your numbers, get your answer and close the tab. Nobody follows up unless you choose to contact Teal Packaging at (224) 546-8325 or info@tealpackaging.com.
What is dimensional weight, and why does it change my shipping cost?
Carriers bill on the greater of two numbers: the actual weight of the parcel and its dimensional weight, which is derived from the box volume. A large, light box can be billed as though it were heavy. Teal's box size and dimensional weight calculator at tealpackaging.com/box-size-dimensional-weight-calculator/ returns the dimensional weight and the likely billable weight, so you can see whether a smaller carton actually saves money before you order a run.
Does the Teal Chrome extension collect any of my data?
No. The Teal DIM Weight and Box Size Calculator, version 1.0.0 on Manifest V3, requests zero browser permissions and runs every calculation locally in your browser. No measurement you enter and no result it produces is sent anywhere, and it cannot read the pages you visit because it never asks for that access. It is live on the Chrome Web Store at chromewebstore.google.com/detail/teal-dim-weight-box-size/kgmjmdedoeaflbobfdjjkgnhileafilo. The web calculator does the same job with nothing to install.
How do I work out what size mylar bag and what oxygen absorber I need?
Start with the mylar bag size finder at tealpackaging.com/mylar-bag-size-finder/, which works from what you are filling rather than from the dimensions printed on a listing. Then use the oxygen absorber calculator at tealpackaging.com/oxygen-absorber-calculator-for-mylar-bags/ for a cc rating based on the air left inside the sealed bag. Both are sizing aids only. How long a product keeps depends on the product, the seal and the storage conditions.
Can these tools tell me what my packaging will cost?
No. Custom pricing moves with size, material, print and quantity together, so it has to be quoted. For instant pricing, the Teal shop at tealpackaging.com/shop/ lists 84 products with live per-unit prices at every quantity break and per-product minimums as low as 5 units. Custom work starts at a 50-unit minimum (100 or more for specialty rigid), with volume pricing from $0.44 per unit, free dieline design and free US shipping.
Once I have settled a spec, how long does production take?
You approve a digital proof before anything prints. After proof approval, production runs from about 7 business days for in-house items and up to about 12 weeks for specialty imported items, plus 2 to 5 business days for US delivery. Timing varies by product, so request a quote at tealpackaging.com/request-quote/ or call (224) 546-8325 to check a specific item.
