Every forwarder has done these sums a thousand times, and every forwarder has got one of them wrong at least once — usually the volumetric, usually on a Friday, usually on the shipment with the thinnest margin. The cost of that mistake is not the arithmetic. It is the phone call three weeks later explaining why the invoice does not match the quote.
The calculators on this page run the exact code that prices shipments inside Cargo-Stack. Not a simplified version, not a marketing copy of it — the same file, checked on every build to be character-for-character identical. If you find a number here you disagree with, you have found a number in our product you disagree with, and we would rather hear about it from a stranger on a free page than from a customer on a live quote.
Nothing you type is sent anywhere. The whole calculation happens in your browser; there is no account, no email box to fill in, and no server that ever sees your cargo. Close the tab and it is gone.
We build quoting software for Hong Kong and Greater Bay Area forwarders. If these are useful, the product is the same thinking applied to the whole job: reading the enquiry, pricing it off your own rate sheet, catching the cost line you forgot, and drafting the reply before your competitor has opened the email.
Cargo-Stack reads the enquiry, prices it against your own rates, and drafts the quote — with this arithmetic underneath it. Same maths, no retyping.
Try it on a real enquiry