Seller Shipping Cost Calculator
Stop guessing at shipping — plug in your package weight and zone rates and see exactly what to charge before you list.
📖 How it works & FAQWhy sellers undercharge for shipping
Shipping is the quietest profit leak in a small shop. Carriers price by weight and distance zone, so the flat $4.99 that covers a nearby buyer can lose money on a cross-country order. Add the box, tape, label, and your time, and "close enough" shipping quietly eats your margin on every sale. This calculator turns weight, a simple zone rate, and a handling fee into one clear number to charge.
How the estimate works
Pick a zone preset to load a typical base rate and per-pound rate, then edit both to match your own carrier's published rates or past labels. The math is simple and transparent: carrier estimate = base rate + (per-lb rate × weight), and total cost = carrier estimate + handling fee. If you charge the buyer, the suggested shipping charge equals that total. If you offer free shipping, the charge drops to $0 and the tool shows exactly how much to add to your item price so you don't absorb the cost. Everything is an estimate, not a live carrier quote — and it's for planning only, not financial, tax, or legal advice.
How to use it
- Enter your package weight in pounds — weigh the item packed, box included.
- Choose the zone preset closest to where most of your buyers are.
- Edit the base and per-lb rates to match your carrier's real prices.
- Set a handling fee for packaging materials and your time.
- Switch "Who pays shipping?" to compare charging the buyer vs. baking it into your price.
FAQ
- Is this the same as a carrier quote?
- No. Carriers use exact zones, dimensional weight, and surcharges. This is a planning estimate — use your last few real labels to calibrate the base & per-lb rates and it gets very close.
- What's a reasonable handling fee?
- Most small sellers use $0.50–$2.00 to cover the box, mailer, tape, and label. If custom packaging takes real time, charge for it — buyers rarely notice a dollar in shipping.
- Should I offer free shipping instead?
- Free shipping often lifts conversion and search placement on marketplaces, but only if the cost lands in your price. Use the "Add to item price" card so free shipping never means unpaid shipping.
- What if my buyers are all over the country?
- Price for your most common zone, or run the national preset as a safe middle. A slight overcharge on near orders offsets a slight undercharge on far ones.