Calculators for online sellers

Each tool uses the rates and fees you enter, explains its formula and shows every step of the result. Choose a category below.

Shipping & parcels

Billable weight, parcel shipping estimates and shipping insurance.

Find the dimensional and billable weight of a box using any carrier divisor and unit.

Estimate a parcel’s cost from your rate card, with fuel and delivery surcharges itemized.

Estimate the premium for insuring a parcel and its cost as a % of declared value.

The full cost of bringing goods across a border.

Add freight, duty, import tax and fees to supplier cost to get a true cost per unit.

3PL pricing and the cost of holding stock.

Turn a 3PL price sheet into a monthly bill and cost per order, and compare up to three.

Measure what it costs per year to keep stock on the shelf, in money and as a %.

Margins, break-even points and marketplace fees.

See what an order really earns after fees, shipping, returns and ads, and your break-even CPA.

Estimate FBA profit per unit and break-even price from the fees you enter.