Two calculators built from Didpop's own formulas

Enter an item price in CNY and the bank rate you have been quoted, and this works out the converted USD amount and the final card charge using the formula from Didpop's own payment-methods article: charge equals the converted amount plus USD 0.30, divided by (1 minus 0.029). That is the rate the worked example in Didpop's help center actually uses, even though the same article separately states 5% elsewhere; see the Fees page for that inconsistency in full.

Enter the date an item was marked stocked in, and this works out the day the free 90-day storage window ends, the day Didpop's reminder goes out (day 150), and the day an unclaimed item is treated as abandoned (day 180), straight from Didpop's own Free Storage Period article.

Run a quick scenario through it: an item stocked in on, say, July 1 has free storage through September 29, a reminder on November 28, and a forfeiture date of December 28. If you are consolidating several orders and waiting for the last one to arrive before shipping everything together, this is the clock that decides how long you can realistically wait before the earliest-arrived item starts costing CN¥0.1 a day.

Didpop's own payment-methods article contains the 5%-versus-2.9% inconsistency covered on the Fees page, and several of its fee rules (the 10% out-of-network service fee, in particular) are stated to scale further by VIP tier without the tier table being published anywhere we could find in its 163-article help center. A calculator built from the published baseline formula will not catch a VIP discount or surcharge that applies only to your specific account tier, so treat the output here as the baseline case, not a guaranteed final number.

Both tools run entirely in your browser; nothing you type is sent anywhere, including to this site. If a number here does not match what you see at Didpop's own checkout once the site is back from maintenance, trust Didpop's number and let us know so we can check our formula against the current version of its help article.

Neither calculator estimates international freight. Didpop's rate sheet lists dozens of shipping lines with different divisors and per-kilogram rates, covered on the Shipping page, and the final figure depends on which line you pick and your parcel's actual packed dimensions, not a formula that holds steady across the whole catalog. Treat freight as a separate, later step once an item is already in the warehouse and you know its real packed weight.

Neither calculator accounts for a discount code, either. Didpop's discount codes apply specifically to international shipping, not to the item price or the service fee covered here, and no guaranteed code value is published for new accounts, so there is nothing reliable for a calculator to apply automatically.