How Casters Calculator Works
A practical explanation of the inputs, formulas, reference data, tests, and limits behind the caster and industrial wheel calculators.
Start with the decision
Casters Calculator is organised around the decision you need to make, not around a product catalogue. Choose a calculator for load and capacity, selection and layout, mounting and fit, motion and ergonomics, floor and environment, wear and failure, or cost and procurement.
The calculator page tells you what to enter, which units are accepted, what the result means, and where the estimate stops. If you do not have the required input, the right next step is to measure it or obtain the manufacturer data, not to guess.
Inputs and units
Inputs are labelled with their units and show a permitted range where the calculation has a hard boundary. Quantity fields can use the unit choices provided by the page; the calculation is then normalised internally before the formula runs. Defaults are starting values for an example, not recommendations for a particular caster or application.
Use the same basis throughout a check. For example, do not mix total cart mass with one-wheel load, or a static catalog rating with a dynamic duty condition. When a value depends on speed, impact, floor condition, temperature, or duty cycle, the page asks for that condition or states the simplifying assumption.
Formulas and results
Each calculator is a fixed calculation over the inputs shown on the page. After a calculation, the Formula section exposes the symbolic formula and the substituted values used for the result. The formula panel starts collapsed so the result stays easy to scan, but the working is available when you need to audit it.
A result is not a pass or fail by itself. Read the label, unit, status message, and any warning together. Compare the result with the manufacturer rating, the actual equipment, the floor, and the duty conditions before specifying or installing a caster.
Reference data and assumptions
- Manufacturer ratings, dimensions, prices, and material properties remain the controlling source for the exact part. Replace any illustrative value with the current published value before relying on the result.
- Where a calculator uses a reference table or a representative coefficient, the page identifies the source or explains what the value represents. A table helps organise a comparison; it does not certify a product.
- Simplifications are intentional and visible. A load-sharing estimate may not model impact, a push-force estimate may not model every floor defect, and a fit check cannot inspect a hidden thread or a damaged mounting plate.
Testing and corrections
Calculator definitions include independent test cases for normal values, boundaries, and failure conditions. A release is checked against those cases before it is made available. That testing verifies the stated model; it does not verify the condition of your equipment or the accuracy of a supplier datasheet.
If a page contradicts its own formula, uses an unclear definition, or contains a stale source value, send the URL and the specific issue through Contact. Verified corrections are applied to the definition or content and the affected test cases are run again.
What the calculators cannot do
The tools do not replace a manufacturer selection, a physical inspection, a structural floor assessment, an ergonomic evaluation, or professional engineering judgement. They do not know the hidden condition of a caster, the true centre of gravity, the quality of an installation, or the local requirements that may apply to your equipment. Use them to frame and check a decision, then verify the decision against the real source data.