Structural Engineering Unit Converters
High-precision conversion calculators, exact governing mathematical formulas, standard code presets, and reference charts for structural engineers, detailers, and students.
Stress & Pressure
Yield strengths, compressive concrete strengths (f'c), and bearing pressures.
| Conversion | From Unit | To Unit | Exact Factor | Calculator |
|---|---|---|---|---|
| ksi→MPa | Kilopound per Square Inch (kips/in²) | Megapascal (N/mm²) | 1 ksi = 6.8948 MPa | Convert→ |
| MPa→ksi | Megapascal (N/mm²) | Kilopound per Square Inch (kips/in²) | 1 MPa = 0.1450 ksi | Convert→ |
| psi→MPa | Pounds per Square Inch (lb/in²) | Megapascal (N/mm²) | 1 psi = 0.0069 MPa | Convert→ |
| MPa→psi | Megapascal (N/mm²) | Pounds per Square Inch (lb/in²) | 1 MPa = 145.04 psi | Convert→ |
Force
Concentrated point loads, column axial forces, and reaction shear envelopes.
Bending Moment
Beam flexural moments, slab strip moments, and overturning reactions.
| Conversion | From Unit | To Unit | Exact Factor | Calculator |
|---|---|---|---|---|
| kip-ft→kN·m | Kip-Foot | Kilonewton-Meter | 1 kip-ft = 1.3558 kN·m | Convert→ |
| kN·m→kip-ft | Kilonewton-Meter | Kip-Foot | 1 kN·m = 0.7376 kip-ft | Convert→ |
Distributed Load
Area floor live loads, roof snow loads, wind pressures, and beam line loads.
| Conversion | From Unit | To Unit | Exact Factor | Calculator |
|---|---|---|---|---|
| psf→kPa | Pounds per Square Foot (lb/ft²) | Kilopascal (kN/m²) | 1 psf = 0.0479 kPa | Convert→ |
| kPa→psf | Kilopascal (kN/m²) | Pounds per Square Foot (lb/ft²) | 1 kPa = 20.8854 psf | Convert→ |
| plf→kN/m | Pounds per Linear Foot (lb/ft) | Kilonewtons per Meter | 1 plf = 0.0146 kN/m | Convert→ |
| kN/m→plf | Kilonewtons per Meter | Pounds per Linear Foot (lb/ft) | 1 kN/m = 68.5218 plf | Convert→ |
Section Properties
Moments of inertia (Ix, Iy) and plastic/elastic section moduli (Zx, Sx).
| Conversion | From Unit | To Unit | Exact Factor | Calculator |
|---|---|---|---|---|
| in⁴→mm⁴ | Inches to the Fourth (in⁴) | Millimeters to the Fourth (mm⁴) | 1 in⁴ = 416231.43 mm⁴ | Convert→ |
| mm⁴→in⁴ | Millimeters to the Fourth (mm⁴) | Inches to the Fourth (in⁴) | 1 mm⁴ = 2.403e-6 in⁴ | Convert→ |
| in³→mm³ | Cubic Inches (in³) | Cubic Millimeters (mm³) | 1 in³ = 16387.06 mm³ | Convert→ |
| mm³→in³ | Cubic Millimeters (mm³) | Cubic Inches (in³) | 1 mm³ = 6.102e-5 in³ | Convert→ |
Geometry & Density
Material densities, soil unit weights, cross-sectional dimensions, and spans.
| Conversion | From Unit | To Unit | Exact Factor | Calculator |
|---|---|---|---|---|
| pcf→kN/m³ | Pounds per Cubic Foot (lb/ft³) | Kilonewtons per Cubic Meter | 1 pcf = 0.1571 kN/m³ | Convert→ |
| kN/m³→pcf | Kilonewtons per Cubic Meter | Pounds per Cubic Foot (lb/ft³) | 1 kN/m³ = 6.3659 pcf | Convert→ |
| in→mm | Inches | Millimeters | 1 in = 25.4000 mm | Convert→ |
| mm→in | Millimeters | Inches | 1 mm = 0.0394 in | Convert→ |
| ft→m | Feet | Meters | 1 ft = 0.3048 m | Convert→ |
| m→ft | Meters | Feet | 1 m = 3.2808 ft | Convert→ |
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