Engineering Unit Conversion Tools for Professionals

ConvertUnits.Engineer provides fast, reliable unit conversions for engineers and scientists. The tools support both common and specialized units used in real engineering calculations, including SI and imperial systems.

Unit Converter

Try typing something like 56.3 m to ft or just m to ft.

Why ConvertUnits.engineer?

Many online unit converters handle only basic measurements. Engineering work often requires conversions between less common units, such as specific weight, pressure, density, and flow rate. This site was created by a practicing engineer to support real-world calculations where accuracy and consistency matter.

More about ConvertUnits.engineer

Unit Categories

Explore the types of units you can convert on this site.

Acceleration

Change in speed over time
Amount of Substance

Counting particles, one mole at a time
Amount-of-Substance Concentration

Concentration of stuff in space
Angle

Angles and arcs, radians and degrees
Area

How much surface something covers
Capacitance

Storing electric energy
Computer Data Rate

Bits per second, blazing fast
Computer Data Storage

How much data you can store
Density

Mass per unit volume
Dynamic Viscosity

Resistance to flow
Electric Charge

Electricity in motion
Electric Conductance

How easily current flows
Electric Current

Flow of electric charge
Electric Resistance

Opposition to electric flow
Energy

Energy to do work
Force

Push or pull on an object
Frequency

How often something happens
Inductance

Magnetic field storage
Insulation
Length

How far, how long, how tall
Luminous Intensity

Brightness of a light source
Mass

Heavy stuff... or not
Mass Flow Rate

Mass moving per second
Mole Flow Rate

Moles moving per second
Power

Rate of doing work
Pressure

Force per unit area
Specific Weight
Speed

How fast are we going?
Surface Tension

Force along a surface
Temperature

Hot, cold, and everything in between
Time

It’s relative anyway
Torque

Rotational force
Unitless
Voltage

Electric potential difference
Volume

How much space something takes
Volume Flow Rate

Volume per unit time

Fun Fact

One knot is one nautical mile per hour. At take-off, a 747 is hurtling down the runway at around 170 knots - also known as 'too late to change your mind' speed.

How many gigameters/second is 170 knot?

Source

Unit Conversion FAQ

Quick answers to common unit conversion questions.

Pick the unit type, select a From unit and a To unit, enter a value, and the calculator converts instantly. For best results, confirm you selected the correct quantity (for example pressure vs stress) before copying the output.

Many unit conversions involve exact ratios that do not map cleanly between systems. The calculator may display additional decimals, but you should round the final value to match the precision of your input data and the engineering method you are using.

No. Converting units changes the representation of a value, not the accuracy of the underlying measurement or method. Report a reasonable number of digits based on the uncertainty of your inputs.

Mass is the amount of matter and is commonly reported in kilograms, grams, or slugs. Weight is a force and is commonly reported in newtons, pounds-force, or kips. Make sure you are using the correct quantity for your calculation.

Gauge pressure is measured relative to atmospheric pressure. Absolute pressure is measured relative to a vacuum. A unit converter does not know which one you intend, so confirm the pressure reference before converting or reporting results.

Many conversion factors are exact by definition (for example inch to meter). Others depend on conventions or reference conditions. When in doubt, verify the standard used for your project or specification.

Yes. After selecting a unit type and units, you can bookmark the page URL. Some pages also support passing a value in the URL to prefill the calculator for quick reuse.

Many industries still use legacy imperial units, especially in the U.S., while standards and global collaboration often use SI. Converters help reduce friction when combining drawings, reports, and vendor data in different unit systems.

Supported Units

Common and engineering-specific units supported for this conversion.

  • A (angstroms)
  • AU (astronimical units)
  • clx (centiluxes)
  • cm (centimeters)
  • chain (Chains)
  • datamile (Data Miles)
  • dalx (decaluxes)
  • dlx (deciluxes)
  • ell (Ells)
  • fathom (Fathoms)
  • ft (feet)
  • fermi (Fermis)
  • furlong (Furlongs)
  • Glx (gigaluxes)
  • hlx (hectoluxes)
  • in (inches)
  • klx (kiloluxes)
  • km (kilometers)
  • league (Leagues)
  • ly (light years)
  • link (Links)
  • Mlx (megaluxes)
  • m (meters)
  • μlx (microluxes)
  • μm (microns)
  • mil (Mils)
  • mi (miles)
  • mlx (milliluxes)
  • mm (millimeters)
  • nlx (nanoluxes)
  • nm (nanometers)
  • nmi (nautical miles)
  • pc (parsecs)
  • pica (Picas)
  • picapt (Pica Points)
  • plx (picoluxes)
  • rod (Rods)
  • survey_ft (Survey Foots)
  • survey_mi (Survey Miles)
  • Tlx (teraluxes)
  • us_fathom (US Fathoms)
  • yd (yards)