Tools built to help you ship.
Price and plan freight before you ever pick up the phone. Four free tools — a density calculator, a freight class lookup, a ZIP lookup and a city & county lookup — all working right here in your browser, no account required. And yes, all four actually work: we built the two the old site only advertised.
Four free shipping tools
Each one runs client-side and answers a real question shippers ask before they book. Pick the one you need — or read the quick guide below.
Freight Density Calculator
Enter each item’s dimensions and weight to get cubic feet and density in PCF. Multi-item shipments supported, with the math shown. Density is the number your freight class and LTL rate are built from.
Open tool →Freight Class Lookup
Turn dimensions and weight into an estimated NMFC freight class off the standard 18-class density scale, with the full class table on the page and your row highlighted.
Open tool →ZIP Code Lookup
Enter any US ZIP code to get its city, county and state instantly, over a bundled dataset of 40,000+ ZIPs. ZIP codes drive LTL routing, transit and rates.
Open tool →City & County Lookup
Enter a US city and state to see every ZIP code it contains, each with its county. The reverse of a ZIP lookup — built for coverage checks and terminal planning.
Open tool →Not sure where to start?
The four tools chain together: density feeds class, and ZIPs feed the lane. Find your situation and jump straight to the right one.
Start with the density calculator — density feeds everything else.
Open the tool → I need the freight class for a quoteUse the class lookup — it estimates the NMFC class from density.
Open the tool → I have a ZIP and need the city/countyThe ZIP code lookup resolves it in your browser, instantly.
Open the tool → I have a city and need its ZIP codesThe city & county lookup lists every ZIP in that city.
Open the tool →Working tools, not just links
A shipping tool that does not compute is just a form that wastes your time. The old RS Group site advertised a ZIP lookup and a city lookup that never actually resolved. We rebuilt all four tools to genuinely work — the density calculator and class lookup do live math as you type, and the ZIP and city lookups search a real US dataset bundled right into the site.
They all run in your browser. Nothing you enter is sent to a server, there is no sign-up, and there is no wait. They exist for one reason: to help you understand your freight — its density, its class, its lanes — before you talk to us. When you are ready, the numbers you worked out here make for a faster, more accurate quote.
What our customers say
- Inc. 5000 · #799 America's fastest-growing private companies (2024)
- TSA IAC Indirect Air Carrier status
- 6,200+ Vetted carrier partners
- 18,500+ Shipments moved to date
I have been working with Brent and his team for almost a year and the experience has been nothing but positive.
The best part of working with RS Group is the customer service you can expect to receive.
RS Group, to me, represents the pinnacle in customer service.
Tools done? Let’s get you a real quote.
You’ve run the numbers — now let us shop your freight across our 6,200+ carrier network and come back with a competitive rate, usually the same day.