Acoustic, Noise, Vibration & NVH Products calculator
Vibration Isolator Load Capacity Calculator
Vibration isolators work only when the equipment load sits in the intended static deflection range. This calculator helps check whether mounts, pads, or springs have enough load capacity after utilization and installation derating are considered.
What this calculator does
- Estimate usable supported load from isolator rating, isolator count, static utilization, and installation derating.
- a facilities or NVH engineer needs to confirm isolator loading before selecting or quoting mounts
- Returns the supported equipment load allowed by the isolator set after utilization and derating.
Formula used
- Gross isolator capacity = rated load per isolator × number of isolators
- Usable supported load = gross capacity × target static utilization × installation derating
Inputs explained
- Rated load per isolator: undefined
- Number of isolators: undefined
- Target static utilization: undefined
- Installation derating: undefined
How to use the result
- Use it for pumps, compressors, HVAC equipment, test fixtures, and machinery bases before choosing mount sizes.
- It does not calculate natural frequency, dynamic load, seismic restraint, or center-of-gravity load split; verify those before release.
Common questions
- Why not use 100% of isolator rating? Mounts usually need static deflection margin and load balance. Running at the edge can reduce isolation or overload one corner.
- What is installation derating? It accounts for uneven floor, load sharing, bolt-up conditions, temperature, or supplier safety factors.
- Can this pick spring rate? No. It checks load capacity. Use natural frequency and transmissibility data to select stiffness and isolation performance.
- What if the equipment weight is higher than the result? Increase mount count or rating, rebalance load, or choose a different isolator family before installation.
Last reviewed 2026-05-12.