About Casters Calculator

What this site is

Casters Calculator is a calculator library for casters, wheels, and the equipment they carry, written for the United States market. It currently ships 41 calculators covering load and capacity, caster selection and layout, mounting and fit, motion and ergonomics, floors and environments, wear and failure, and procurement cost. Each calculator is a fixed formula over labelled inputs that you can read, and each one carries 151 automated test cases that must pass before the tool is published.

The library is not tied to any caster manufacturer, distributor, or integrator. It exists because caster decisions are made on numbers that are easy to get subtly wrong: how much load one wheel actually carries, which wheel size and material fits the floor, whether a replacement caster will mount at the same height, how much force it takes to push a loaded cart, and what a full-set replacement really costs. This site makes those numbers checkable in a few minutes, with every assumption visible.

Who it is for

• Maintenance and MRO teams replacing casters on carts, racks, dollies, and shop equipment.
• Equipment and cart designers checking per-wheel capacity, mounting height, bolt pattern, and push effort before specifying a caster.
• Warehouse, facility, and manufacturing engineers weighing layout, floor loading, and towing conditions.
• Purchasing teams comparing part numbers, replacement intervals, and total cost across a fleet.

How the calculators are built

• Fixed formulas, visible inputs. There is no location lookup, no hidden score, and no black-box adjustment: the values you type plus the stated defaults determine the result, and every calculator page shows the formula it used with your numbers substituted into it.
• Machine-checked before publication. Each calculator ships with test cases that fixed inputs must reproduce exactly, including boundary and degenerate cases. A tool that fails its cases is not published.
• Sourced reference tables, not memorised numbers. 0 published lookup tables ship with the library where a calculation depends on one, such as standard mounting plate and bolt patterns or wheel material properties. Where a figure belongs to an outside body, the source is named on the page and the value is an input you can replace: catalog capacities, prices, friction and rolling-resistance values, and duty periods are all entered by you with the source to look up named in the field help.
• Limits stated, not glossed over. Where a calculation cannot be done honestly without site-specific data, the tool says so and asks for that data instead of inventing a coefficient. The How Casters Calculator Works page lists what each family of tools does and does not model.

What you can do here

• Run calculators without an account. Every tool works anonymously, and browsing them sets no cookies.
• Download a calculator result as a PDF where that calculator provides the report action, so a figure can be shared or filed with a quote.
• Read the guides, which pair a table of parameters with a worked example you can reproduce by hand.

Editorial standards

Defaults and examples are editorial choices, never endorsements. No caster manufacturer, distributor, or integrator pays for placement in a calculator, a default value, or a guide; if that ever changes for a specific page, the relationship will be disclosed on that page. Where a figure comes from an outside body, the page names it and gives the data year where one applies, so a reader can tell a two-year-old benchmark from a current catalog.

Errors are corrected rather than quietly patched. If a page has a wrong number, a broken calculation, or a source you cannot trace, send the URL and the specific problem through Contact; verified corrections are applied and the page is updated.

What this site is not

These are screening tools. They are not engineering or design services, not a load-rating certification, not a safety approval, not a supplier quote, and not a substitute for the caster manufacturer's datasheet or installation instructions. Where a tool touches load capacity, mounting, towing, or any safety-related application, the manufacturer's published ratings, the applicable standard, and a qualified engineer's judgement govern, and installation work should be performed or supervised by competent persons. A calculator output is not an approval, an inspection, or a substitute for looking at the equipment and the floor.

Who runs the site

Casters Calculator is published and maintained by its operator. Nothing on the site represents a certification, accreditation, professional licence, or third-party audit, and no such claim is made here. Operator details required for a specific purpose, such as the entity to name on an invoice or a takedown notice, are available on request through Contact. casterscalculator.org is the address the site publishes under.

For privacy practices, see the Privacy page; for the terms that govern use of the site, see Terms; for how the numbers are produced and verified, see How Casters Calculator Works.

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