The Ikea website has a shipping rate calculator that gives shipping estimates by ZIP code. The estimated cost factors in both the retail price of the items and their weight and volume.
At the bottom of the Ikea homepage, click on the Online Delivery link under the Delivery Information heading. On the Online Delivery page, read the information, then click Shopping Cart Delivery Pricing Tool. Enter your ZIP code and click Submit. The next page shows available shipping days and an average price for shipping the items. To enter another ZIP code, click on the Check Another Zip Code button.