FREE ENGINEERING CALCULATORS
Accurate, educational tools for civil and structural engineering students and professionals.
Reinforced Concrete Design
RC Beam Design
Singly/doubly reinforced beams, flexure + shear, interaction diagram.
RC Column Design
Rectangular columns, interaction diagram, tied and spiral.
RC Footing Design
Isolated footings, bearing, punching + one-way shear, flexure.
RC Slab Design
One-way slabs, flexure + shear, 1000mm strip design.
Structural Analysis
Beam Reactions, Shear & Bending Moment
Calculate support reactions, shear force diagrams, and bending moment diagrams. Features piecewise equations, equilibrium verification, saved calculations, and PDF reports.
Tributary Area & Load Calculator
Determine tributary widths, areas, and gravity loads for interior, edge, and corner beams and columns.
General Engineering
Engineering Unit Converter
Convert between SI and US Customary units for length, force, pressure, moment, area, volume, and more.
Preliminary Structural Loading
Basic Wind-Load Calculator
Preliminary MWFRS wind pressures per NSCP 2015 or ASCE 7-22. Shows every coefficient, formula, and substituted value. For educational and conceptual use only.
NSCP 2015 Seismic Load Calculator
Static Force Procedure base shear, vertical force distribution, story shear, and overturning moment per NSCP 2015 Section 208. Shows every coefficient, formula, and substituted value. Educational and preliminary use only.
Cross-Section Analysis
Section Property Calculator
Calculate area, centroid, moment of inertia, section modulus, and radius of gyration for rectangles, circles, I-sections, and T-sections.
Beam Deflection Calculator
Calculate maximum deflection and deflection at any point for simply supported and cantilever beams under point loads and uniform distributed loads.
Basic Stress Calculator
Calculate axial stress, flexural stress (σ=My/I), average shear stress, and bearing stress for preliminary member sizing.
Looking for material quantities?
Use our existing Quantity Estimator — calculate concrete, steel, lumber, and more.
Why Use Our Calculators?
Accurate
Built on established engineering principles and code references.
Educational
Step-by-step solutions help you understand the process, not just the answer.
Free
No subscription, no paywall. All tools are freely accessible.
Mobile-Friendly
Fully responsive — use on any device, anywhere.
Disclaimer
All calculators on this page are provided for educational and preliminary design purposes only. Results have not been reviewed by a licensed engineer and must not be used as the sole basis for any structural or construction decision. Always consult a licensed professional engineer for final design verification. Halcon Peak assumes no liability for any damages arising from the use of these tools.
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