Civil Geo Tools
Practical Civil & Geotechnical Engineering Tools
Free calculators, worked examples, and plain-English guides for soil mechanics, foundations, slopes, retaining walls, drainage, and civil engineering design.
Popular calculators
Practical tools for common calculations
Civil Engineering
Concrete Volume Calculator
Estimate concrete volume for slabs, footings, pads, and other rectangular placements.
Foundations
Bearing Capacity Calculator
Screen shallow foundation bearing capacity using a Terzaghi-style calculation.
Foundations
Footing Size Calculator
Size square, rectangular, or continuous strip footings from service load and allowable soil bearing pressure.
Foundations
Footing Contact Pressure Calculator
Calculate biaxial corner pressures, eccentricities, kern status, and allowable-pressure utilization for a rigid rectangular footing.
Foundations
Elastic Settlement Calculator
Estimate immediate shallow-foundation settlement using net pressure, footing width, soil modulus, Poisson ratio, and an engineer-selected influence factor.
Foundations
Axial Pile Capacity Calculator
Combine project-specific average shaft and toe resistances to estimate ultimate and allowable compression capacity for one circular pile.
Geotechnical Engineering
Lateral Earth Pressure Calculator
Estimate active, at-rest, or passive lateral earth pressure for simple drained backfill cases.
Geotechnical Engineering
Infinite Slope Factor of Safety Calculator
Calculate infinite-slope factor of safety from slope angle, soil thickness, unit weight, cohesion, friction angle, and pore-pressure ratio.
Foundation Design Tools
Bearing, footing sizing, contact pressure, settlement, and axial pile capacity workflows.
Geotechnical Engineering Guides
Soil mechanics, foundations, slopes, retaining walls, drainage, and site investigation topics.
Civil Engineering Worked Examples
Step-by-step calculations that show formulas, units, assumptions, and checks.
For Homeowners & Contractors
Plain-English explanations of cracks, drainage, retaining walls, erosion, and soil reports.
PE/FE Exam Prep
Formula sheets and exam-focused explanations for core civil and geotechnical topics.
Latest articles
Reviewed engineering references
How to Read a Proctor Curve: OMC, MDD, and Example
Read a Proctor moisture-density curve, identify OMC and MDD, check dry and wet sides, verify peak bracketing, and follow a worked dataset.
civil engineeringStandard vs Modified Proctor Test: Key Differences
Compare Standard and Modified Proctor tests by ASTM method, rammer, drop, layers, compactive effort, OMC, MDD, and field acceptance use.
foundationsCommon Foundation Failure Modes
Foundation failure modes including bearing failure, settlement, sliding, overturning, uplift, scour, expansive soil movement, and construction defects.
foundationsDriven Piles vs. Drilled Shafts
Engineering comparison of driven piles and drilled shafts, including load transfer, applications, construction risks, testing, and limitations.
foundationsEccentric Footing Loads, Kern Checks, and Partial Contact
How moments shift footing resultants, change corner pressure, and cause partial soil contact under uniaxial or biaxial loading.
foundationsFoundation Construction Inspection and Quality Control
Practical inspection and acceptance guide for shallow foundations, driven piles, drilled shafts, micropiles, and augered piles.
Downloadable Templates
Calculation sheets, checklists, and PE/FE reference downloads built for practical review and record keeping.
Free Civil & Geotechnical Formula Sheet
Download the PDF directly. It includes practical formulas, common symbols, and unit reminders for civil and geotechnical review.
No signup required. PDF, approximately 17 KB.
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