为什么最终运费与估算时不一样？

每个包裹在入库时都会单独称重与测量体积，当您提交打包时的估算重量和体积是入库时候包裹的重量和体积的总和，因此打包好后的重量或者体积可能会与估算时有差别。

如果包裹可以使用快递袋子装，是不需要计算体积，只计算实际重量。

Why does my final shipping rate differ from the estimate provided by your shipping calculator?

Each parcel is weighed and measured when it is received at the RapidMY  warehouse.

The final shipping rate you are charged will be based on these actual dimensions and measurements, rather than any estimate provided in advance by our shipping calculator.

Package shipped in satchel will calulate by actual weight instead of cubic.