Free research library
Mattress data worth citing.
Reusable tables, calculators, charts, and comparisons built for shoppers, writers, designers, and bedroom planners. Sources and methodology are shown where they matter.
Interactive calculator
Interactive room-size table
Enter room dimensions, compare every standard U.S. bed size, and see realistic side and foot clearance.
Open resourceChart + converter
Foam-density chart
Compare polyfoam, memory foam, and latex density ranges without confusing density with firmness.
Open resourceSource-backed dataset
Mattress Weight Database
Filter 160 verified weights across 30 mattress configurations by brand, construction, and size, with a primary manufacturer source on every row.
Open resourcePolicy comparison
Amazon return-policy comparison
See why a brand-direct sleep trial and an Amazon return window are not the same promise.
Open resourceFree SVG embed
Embeddable mattress-size chart
Download or embed a responsive SVG showing the six common U.S. mattress dimensions at a consistent scale.
Open resource