Hi,
The HikaShop "manual shipping plugin" does not provide such feature.
You can create several shipping methods with different restrictions ; it will create some "steps" depending the weight, but it won't be the perfect "conversion".
If you really want so, it will require a custom plugin.
If you have some development/PHP skills, you can do it yourself, otherwise we will recommend you to contact a developer.
www.hikashop.com/support/support/documen...r-documentation.html
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.