Engineering Converters
About Engineering Converters
Welcome to UnitConvertersLab's Engineering Converters, your reliable online destination for fast, accurate, and practical engineering unit conversions.
Whether you're an engineering student working on assignments, a professional solving real-world design problems, or a maker building projects at home — converting between units shouldn't slow you down.
From force, pressure, torque, power, energy, density, and flow rate to stress, strain, heat transfer, and more, our converters cover essential engineering categories.
Our converters are perfect for:
- Students and educators needing quick, dependable answers
- Engineers, technicians, and professionals dealing with measurement tasks
- Travelers and curious learners adapting between metric and imperial systems
- Everyday users solving practical problems
We aim to help you save time and avoid calculation errors with tools you can trust, anytime and on any device.
Frequently Asked Questions — Engineering Converters
Question: What engineering units are available to convert?
Answer: Engineering Converters cover force, torque, pressure, density, power, energy, flow rate, velocity, acceleration, moment of inertia, specific volume, and more — all the units commonly used in mechanical, civil, and electrical engineering.
Question: How do I convert Newtons to pounds-force?
Answer: 1 Newton (N) = 0.224809 pounds-force (lbf). To convert, multiply the value in Newtons by 0.224809. For example, 50 N = 50 × 0.224809 = 11.24 lbf.
Question: What is the SI unit of pressure?
Answer: The SI unit of pressure is the Pascal (Pa). Common conversions: 1 bar = 100,000 Pa; 1 psi ≈ 6,894.76 Pa; 1 atm = 101,325 Pa. Use the pressure converter to switch between any of these units instantly.
Question: How do I convert horsepower to watts?
Answer: 1 mechanical horsepower (hp) = 745.699872 watts (W). To convert, multiply horsepower by 745.7. For example, 5 hp = 5 × 745.7 = 3,728.5 W = 3.73 kW.
Question: What is the difference between torque and force?
Answer: Force is a linear push or pull measured in Newtons (N) or pounds-force (lbf). Torque is a rotational or twisting force measured in Newton-meters (N·m) or foot-pounds (ft·lbf). Torque equals force multiplied by the perpendicular distance from the pivot point.
Engineering unit conversion is a critical skill across mechanical, civil, aerospace, chemical, and electrical engineering. When international teams collaborate on a single project — or when engineers reference standards from different countries — the ability to switch between SI (International System of Units) and imperial or US customary units eliminates costly errors and rework. A bolt specified in Newton-meters tightened with a foot-pound wrench, or a structural beam calculated in kN·m built to a kip·ft drawing, can cause real-world failures. Accurate, instant unit conversion is not a convenience — it is a professional requirement.
Unit Converters Lab's Engineering Converters section brings together a complete suite of specialized tools covering the most important physical quantities used in engineering analysis and design. All converters use internationally standardized conversion factors with up to 12 significant digits of precision. They run entirely in your browser — no registration, no downloads, no subscriptions, and no limitations. Each converter includes clear unit descriptions to help students and professionals build a deeper understanding of the quantities they work with.
The Acceleration Converter covers 19 units spanning the full metric prefix range from attometer/s² to kilometer/s², plus imperial units (ft/s², in/s², mile/s², yard/s²), standard gravity (g = 9.80665 m/s²) for aerospace and vehicle dynamics, and the Gal (cm/s²) for geophysics. Acceleration is the foundation of Newton's Second Law (F = ma) and appears throughout structural dynamics, vehicle performance testing, seismic engineering, and flight mechanics.
The Angular Acceleration Converter supports 5 units: radian/s², radian/min², revolution/s², revolution/min/s, and revolution/min². Angular acceleration governs how quickly motors, turbines, and robotic joints spin up or slow down. It appears in Newton's rotational law — Torque = Moment of Inertia × Angular Acceleration (τ = Iα) — making it central to drivetrain and servo control system design.
The Angular Velocity Converter covers 12 units including radian/second (SI), RPM (the industrial standard for motors and engines), degrees per second (gyroscopes and IMUs), and variants in hours and days (astronomy and geodesy). Accurate angular velocity conversion is critical for motor selection, gearbox design, rotor balancing, and navigation system calibration.
The Density Converter supports over 30 units across the SI metric spectrum and imperial systems — kg/m³, g/cm³, lb/ft³, lb/in³, lb/gal (US & UK), oz/ft³, oz/in³, grain/gal, and the full metric prefix series from ag/L to Eg/L. Density is fundamental in fluid mechanics, buoyancy calculations, material selection, mixing ratios, and structural load estimation. Water at 4°C (1000 kg/m³ = 62.428 lb/ft³) is the universal density reference.
The Torque Converter handles 17 units including N·m, kN·m, dyne·cm, kgf·m, gf·cm, ozf·in, lbf·in, and lbf·ft. Torque specifications appear in engine datasheets, fastener tightening tables, robotics joint controllers, and material testing equipment. Converting accurately between metric and imperial torque is a daily need in global engineering projects.
The Moment of Force Converter covers 12 units from µN·m (MEMS devices and precision instruments) up to ton-force·m (heavy structural engineering). Though physically identical to torque, "moment of force" is the preferred structural engineering term for describing bending moments and reaction moments in beams and frames.
The Moment of Inertia Converter provides 14 units including kg·m² (SI), slug·ft² (aerospace), oz·in² (servo motors), lb·ft², and kgf·m·s². Moment of inertia determines how much torque is required to achieve a given angular acceleration — central to flywheel design, electric motor sizing, and rotor dynamics analysis.
The Specific Volume Converter offers 8 units — m³/kg, cm³/g, L/kg, L/g, ft³/kg, ft³/lb, gal(US)/lb, gal(UK)/lb — covering all units found in thermodynamic steam tables, refrigerant property charts, HVAC psychrometric charts, and chemical process engineering datasheets. Specific volume is the reciprocal of density and is essential for describing gas and vapor behavior in engineering thermodynamics. Use any of these converters instantly, free, with no limitations.
Frequently Asked Questions
Q: What engineering units are available to convert?
A: Engineering Converters cover acceleration, angular acceleration, angular velocity, density, torque, moment of force, moment of inertia, and specific volume — all units widely used in mechanical, civil, and aerospace engineering.
Q: How do I convert Newtons to pounds-force?
A: 1 Newton (N) = 0.224809 pounds-force (lbf). Multiply the value in Newtons by 0.224809 to get lbf. For example, 50 N = 50 × 0.224809 = 11.24 lbf.
Q: What is the difference between torque and moment of force?
A: Torque and moment of force describe the same physical quantity — a rotational effect of a force about a pivot. Both are measured in Newton-meters (N·m) or foot-pounds (ft·lbf). "Torque" is common in mechanical and automotive contexts; "moment of force" is preferred in structural engineering.
Q: How do I convert kg/m³ to lb/ft³?
A: 1 kg/m³ = 0.0624279606 lb/ft³. Multiply any density in kg/m³ by 0.06243 to get lb/ft³. For example, water at 1000 kg/m³ = 1000 × 0.06243 = 62.43 lb/ft³.
Q: How do I convert RPM to radians per second?
A: 1 revolution per minute (RPM) = 2π/60 ≈ 0.10472 radians per second (rad/s). Multiply RPM by 0.10472 to get rad/s. For example, 3000 RPM = 3000 × 0.10472 = 314.16 rad/s.