Free Online Engineering Unit Converter

Our Free Online Engineering Unit Converter is designed for engineers, students, and technical professionals who need quick and accurate conversions across multiple unit systems. From SI to Imperial, this all-in-one tool helps you perform instant conversions across pressure, flow, temperature, length, energy, and more. Whether you work in oil & gas, chemical processing, HVAC, mechanical design, or construction, this converter saves time and reduces errors in daily calculations.

Unit Converters | Engineer's Notebook

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Angle Unit Conversions

Angle is a measure of the rotation between two intersecting lines or planes, expressed in units such as degrees, radians, or gradians. Converting between these units is essential in engineering, construction, navigation, and physics calculations, ensuring precision in measurements and designs.

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Area Unit Conversions

Area is a measure of the surface enclosed within a set of boundaries. Common units include square meters (m²), square centimeters (cm²), square feet (ft²), square inches (in²), and acres. Accurate area conversions are critical in engineering, construction, land surveying, and HVAC calculations to ensure consistency across international standards.

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Current Unit Conversions

Electric current is a measure of the flow of electric charge in a conductor. Common units include Amperes (A), Milliamperes (mA), and kiloamperes (kA). Accurate current conversions are essential in electrical engineering, instrumentation, and process control to ensure compatibility between devices and systems.

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Density Unit Conversions

Density is the mass per unit volume of a substance, commonly used in fluid mechanics, material science, and process engineering. Typical units include kilograms per cubic meter (kg/m³), grams per cubic centimeter (g/cm³), and pounds per cubic foot (lb/ft³). Accurate density conversions help ensure correct calculations for mass, volume, and flow.

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Force Unit Conversions

Force is a physical quantity that causes an object to accelerate, commonly measured in newtons (N), pounds-force (lbf), and kilogram-force (kgf). Accurate force conversions are essential in mechanical design, structural analysis, and process calculations.

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Length Unit Conversions

Length is a fundamental measurement of distance or dimension. Accurate length conversions are crucial in construction, piping, mechanical design, and engineering calculations. Common units include meters (m), centimeters (cm), millimeters (mm), inches (in), and feet (ft).

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Pressure Unit Conversions

Pressure is the force applied perpendicular to the surface of an object per unit area. It is a fundamental parameter in engineering, especially in piping, boilers, hydraulic systems, and process industries. Engineers use various units depending on the application, country, or standard, including Pascal (Pa), Bar, Kilopascal (kPa), Pounds per Square Inch (psi), Atmosphere (atm), and Millimeter of Mercury (mmHg). Accurate pressure conversions are crucial for system design, safety, and compliance with standards like ASME, API, and ISO.

Temperature Unit Conversions

Temperature is a fundamental physical quantity that indicates the degree of hotness or coldness of a substance. It is widely used in engineering, thermodynamics, and process industries to ensure proper functioning of equipment like heat exchangers, boilers, refrigeration systems, and HVAC units. Engineers often need to convert between different temperature scales for calculations, design, and international standard compliance.

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Mass/Weight Unit Conversions

Mass or weight measures the amount of matter in an object. Conversions are essential in mechanical design, material handling, and fluid calculations. Common units include kilograms (kg), grams (g), pounds (lb), and tons (t).

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Power Unit Conversions

Power measures the rate at which work is done or energy is transferred. Conversions are important in mechanical, electrical, and process engineering. Common units include Watt (W), Kilowatt (kW), Horsepower (hp), and BTU per hour (BTU/h).

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Time Unit Conversions

Time is a fundamental quantity in engineering, science, and daily life. Accurate conversions between different units are essential in process calculations, scheduling, and system design. Common units include seconds (s), minutes (min), hours (h), and days (d).

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Volume Unit Conversions

Volume represents the space occupied by a substance or object. Accurate volume conversions are crucial in engineering, fluid mechanics, chemical processes, and everyday measurements. Common units include cubic meters (m³), liters (L), milliliters (mL), cubic feet (ft³), and gallons (gal).

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Volumetric Flow Rate Unit Conversions

Volumetric flow rate measures the volume of fluid passing through a cross-section per unit time. It is widely used in piping, pumps, HVAC, and chemical processes. Common units include cubic meters per hour (m³/h), liters per second (L/s), gallons per minute (GPM), and cubic feet per minute (CFM).

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