Engineering Unit Converters
Convert SI, metric, and US customary units with tools organized around real civil and geotechnical engineering work. Each page states its conversion basis, assumptions, and common applications.
Featured geotechnical converter
Unit Weight and Density
Convert soil and material values between pcf, kN/m3, N/m3, kg/m3, Mg/m3, and g/cm3 while keeping the distinction between mass density and unit weight visible.
Open unit weight and density converterGeneral Engineering
Core dimensional, mechanical, hydraulic, and temperature conversions used across civil and engineering calculations.
Length and displacement
Convert engineering lengths and displacements between metric and US customary units.
Open converterArea
Convert surface area between square metric units, square US customary units, hectares, and acres.
Open converterVolume and capacity
Convert soil, concrete, water, and storage volumes between metric and US customary units.
Open converterMass
Convert mass between metric units, pounds, ounces, and US short tons.
Open converterForce
Convert force between newtons, kilonewtons, pound-force, kips, and kilogram-force.
Open converterPressure and stress
Convert pressure, stress, bearing pressure, and surcharge units used in civil and geotechnical engineering.
Open converterMoment and torque
Convert bending moments and torque between SI and US customary engineering units.
Open converterFlow rate
Convert water and fluid discharge between SI, cubic feet per second, gallons per minute, and MGD.
Open converterVelocity
Convert velocity and movement rate between metric and US customary units.
Open converterTemperature
Convert temperature between Celsius, Fahrenheit, kelvin, and Rankine.
Open converterEnergy and work
Convert energy and work between joules, watt-hours, foot-pounds, and Btu.
Open converterPower
Convert mechanical and thermal power between watts, horsepower, foot-pounds per second, and Btu per hour.
Open converterTime
Convert time intervals between seconds, minutes, hours, days, weeks, and average years.
Open converterSlope and gradient
Convert slope between decimal rise/run, percent grade, degrees, and horizontal-to-vertical ratio.
Open converterGeotechnical and Hydraulics
Specialist conversions for soil mechanics, laboratory data, groundwater, seepage, consolidation, and field monitoring.
Hydraulic conductivity
Convert hydraulic conductivity and coefficient of permeability between common laboratory and field units.
Open converterCoefficient of consolidation
Convert coefficient of consolidation, cv, between common laboratory and design units.
Open converterDistributed line load
Convert line loads used for walls, beams, strip footings, utilities, and surcharge idealizations.
Open converterSoil particle size
Convert soil particle diameter between micrometers, millimeters, inches, and other length units.
Open converterWater pressure head
Convert freshwater pressure head to pressure units and back using standard gravity.
Open converterSettlement rate
Convert settlement, heave, and ground-movement rates between common monitoring units.
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