Free shipping threshold and DIM weight calculator
Find the free-shipping threshold that keeps your profit per order, and see what a carrier really bills a box at once dimensional weight is counted.
Free, no sign-up. Everything is worked out in your browser — nothing you type is sent anywhere.
How it's worked out
threshold = average order + shipping ÷ marginAt margin m, an order must grow by shipping ÷ m for its extra margin to pay the parcel you now
cover. Below shipping ÷ m on its own, an order's whole margin is less than its shipping.
The billable weight is the greater of the actual and dimensional weights, rounded up to the carrier's step, and the cost is the base rate plus the rate per kg on it.
Questions
- How do I set a free-shipping threshold?
- High enough that the extra spend it draws pays for the parcel. If shipping costs you $8 and you keep 50¢ of every dollar sold, a free-shipping order must be $16 bigger than today's average to earn the same — so set the threshold at your average order plus shipping ÷ margin.
- What is dimensional (DIM) weight?
- A carrier's charge for the space a box takes: length × width × height ÷ a divisor. When it's more than the box's real weight, you're billed on it. A light product in a big box pays for air.
- Which divisor should I use?
- The one your carrier publishes. 5,000 (cm and kg) is common for international express, some domestic services use 4,000 or 6,000, and in inches and pounds 139 is typical. Use the same units for the box and the actual weight.
Pack the right box, quote the right rate
Manifold packs each order into the boxes you stock and quotes live carrier rates on the packed size and weight, with rate rules per channel — so checkout charges what the parcel really costs.
More free tools
- Landed cost calculator — Spread freight, duty and fees over a PO by value, units or weight — every line's landed unit cost, to the cent.
- Economic order quantity (EOQ) calculator — The order size where a year's ordering cost meets its holding cost.
- Reorder point and safety stock calculator — When to reorder: lead-time demand plus safety stock for the service level you want, and the cost of running out.
- Inventory turnover and days of inventory calculator — Turns, days of inventory, and the cash a faster turn frees.
- Kit and bundle profit calculator — A bundle's margin against its parts sold separately, and how many kits your stock builds.
- Product pricing and margin calculator — Price to a target margin after fees — retail, wholesale and quantity breaks, with break-even.
- Return and refund cost calculator — Both parcels, the fee you don't get back, handling and write-offs: a return's real cost.
- Wholesale vs direct-to-consumer calculator — Wholesale and direct side by side, with each channel's true CAC beside the blended one.
- Profit and loss builder — A month's P&L for a product business, on accrual or cash basis.
- What Manifold costs — Your month on Manifold's one plan, band by band, at your order volume.