A single record feels light, but a few hundred on one shelf put real weight on it. Enter the records you hold, the weight of one as you weighed it, the shelves you will split them across and the rated load printed on your shelving, and the page gives the total, the load per shelf and how much is left under or over that rating.
The arithmetic multiplies the count by the per-record weight and divides by the shelf count. The margin and the share of the rated load are computed from the unrounded values and rounded only for display, so rounding errors never pile up in the percentage. The weight per shelf and the under or over figure both show two decimals so they line up, and the page says about equal only when the gap rounds to 0.00 lb (under 0.005 lb). Records that fit on a shelf are a count of things that fit, so that figure is rounded down and the label says so. Current as of October 2026.
Record condition grades and market value are not covered, because those scales are proprietary to marketplaces and grading services with no published conversion table. No safety factor is added either; those are set by makers and no common official factor exists. Rated loads shift with how a shelf is mounted and how far apart its supports sit, so these numbers do not make anything safe.
Frequently Asked Questions
No. Condition standards come from marketplaces and grading services as their own proprietary scales, and no published conversion table exists. This page calculates storage weight only.
No. It only shows figures next to the rated load from the maker's label and adds no safety factor. Rated loads depend on how a shelf is mounted and how far apart its supports sit, so check the maker's guidance and your own installation.
Weigh one yourself. Per-record weight varies a lot with pressing thickness, jacket type and inner sleeves, and no official standard weight exists.