ParcelMath Check a box
For Etsy, Shopify & marketplace sellers

Stop paying to ship air.
Know every order's real cost.

Billable weight for every box, packaging cost per order, a carrier comparison for your real parcels, and shipping charged vs paid so you can see what shipping costs your margin.

  • Excel, Sheets & print
  • Dimensional weight
  • Charged vs paid
  • 30-day fix-or-refund

Dimensional Weight Calculator

Edit the numbers — it updates as you type.

Billable weight (rounded up)
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Dimensional weight
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Billed on size, not weight?
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Open the full tool & method →

Where the margin goes

Three shipping leaks

  1. Billed for box size

    Big boxes are charged on dimensional weight, not what's inside.

  2. Packaging nobody counts

    Box, fill, tape, insert and packing time: often $2-3 an order.

  3. Shipping charges that don't cover labels

    Small losses per order add up over a month.

Packages

Checklists, workbook, or both

A packing station on paper, the cost workbook, or the seller kit.

Starter

Printable Packing & Shipping Checklists

$5 one-time

Best for: Setting up a packing station that doesn't waste boxes.

  • Packing station setup checklist
  • Box-size and dim-weight chart
  • Per-order packing checklist
  • Daily shipping log and damage & returns log
View Starter

Pro

Shipping Cost & Packaging Workbook

$12 one-time

Best for: Seeing what shipping really costs per order.

  • Boxes: volume and dimensional weight with your divisor
  • Products: billable weight and a dim-weight flag
  • Packaging cost per order including labour
  • Rates: cheapest carrier per product
  • Orders: shipping profit or loss and free-shipping threshold test
View Pro

PayPal, card (via PayPal) or Bitcoin · instant download link by email · 30-day fix-or-refund

Free tools

Free tools that show their working

Nothing you type leaves your device.

All tools

Dimensional Weight Calculator

Length × width × height ÷ the carrier's divisor, compared with the actual weight: which one you'll be billed for.

Open calculator →

FAQ

Questions, answered honestly

Which divisor should I use?

The one your carrier publishes for the service you use. Divisors differ by carrier, service and country, so the workbook lets you set it.

Does it pull live carrier rates?

No. Paste rates from each carrier's calculator into the Rates sheet; the workbook finds the cheapest and tracks what you charged.

Does it work in kilograms and centimetres?

Yes. Enter cm and kg and set the divisor your carrier uses for metric (often 5,000 or 6,000 cm³/kg).

How do I pay, and do you accept cards?

PayPal, or a debit/credit card through PayPal's checkout where PayPal offers guest checkout. You can also pay with Bitcoin (on-chain).

When do I receive my files?

PayPal: a private download link is emailed to your PayPal address, usually within about 15 minutes. Bitcoin: email your order code to eclipsekingdom.support@gmail.com; the link follows one blockchain confirmation. Links stay valid for 30 days.

What if a file doesn't work for me?

Email eclipsekingdom.support@gmail.com within 30 days and we'll fix it or refund you (PayPal refunds via PayPal; Bitcoin refunds in BTC for the USD value paid). See terms & refunds.

Look inside

Inside the shipping workbook

Generated from the real Shipping Cost & Packaging Workbook.

Full preview
Settings

Settings

Setting · Value

Summary

Summary

Orders logged · Shipping charged to customers · Label costs paid · Packaging costs · Shipping profit / loss overall

Sheet

Boxes

Box · Length in · Width in · Height in · Cost each · Volume in³

How buying works

Pay with PayPal, card or Bitcoin. No account needed

  1. PayPal or card

    Finish on paypal.com. We email a private download link to your PayPal email once PayPal's payment notification reaches us, usually within about 15 minutes. Check spam too.

  2. Bitcoin

    Send the exact BTC amount shown, then email the order code to eclipsekingdom.support@gmail.com. After one blockchain confirmation we reply with your private link.

  3. Download

    Your private link works for 30 days. Lost it? Email eclipsekingdom.support@gmail.com and we'll resend it.

Guides

Plain-English guides with worked examples

All guides

Is your box billed on size?

Enter length, width, height and weight to see the billable weight.

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