Free Engineering Tool #221
Machine Foundation Mass Calculator
Size machine foundations using the 3:1 mass rule. Enter machine mass, speed and soil bearing capacity.
m_found ≥ 3×m_machineFoundation SizingAuto-Calc
Results
Required Foundation Mass
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Foundation Volume
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Suggested Dimensions
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Soil Pressure Check
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Foundation Mass Rule
For reciprocating machines use 5:1 ratio. For rotating machines 3:1 is typical. Higher speeds may need more mass.
The mass ratio ensures the foundation can absorb vibration energy and keep amplitudes low. Higher ratios reduce vibration further.
Minimum M25 (25 MPa) for machine foundations. M30 or higher for high-speed machines.
Depth should be at least 1.5× the machine base width, or to reach stable soil.
For reciprocating machines (compressors, engines) and machines with significant unbalanced forces.
Yes. Minimum 50 kg/m³ of reinforcement steel for machine foundations.
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