Home

Calculations
Contacts
Conversions
Help
Links
Subjects

General Topics

1e12: One trillion.
1e15: One quadrillion.
1e18: One quintillion.
1e21: One sextillion.
1e3: One thousand
1e6: One million.
1e9: One billion.
2.17987190e-18 J: Rydberg Constant multiplied by Plancks constant and the speed of light.
24 Hour Clock: The convention of time keeping in which the day runs from midnight to midnight and is divided into 24 hours numbered from 0 to 23.
a: Prefix representing a multiplication of 10^-18
Abort: To terminate or stop a process prematurely.
About Us: We are a small consultancy formed from a group of people with very different skills in engineering, physics and software engineering.
Abrasive Cleaner: A cleanser with some hard grit used to remove the grime and oils from a surface.
Absolute Error: The uncertainty in a measurement, expressed with appropriate units.
ac ft: Abbreviation of acre foot, a volume one foot deep covering an area of one acre.
ac in: Abbreviation of acre inch, a volume one inch deep covering an area of one acre.
ac: Abbreviation of acre.
Acre Foot: A volume one foot deep covering an area of one acre.
Acre Inch: A volume one inch deep covering an area of one acre.
AD: Abbreviation of Anno Domini.
Admiralty Mile: Equal to 1852m.
Aft: The back of a vessel.
Altitude: Height in space of an object or point relative to sea level or ground level.
am: Abbreviation of attometre a distance of 10^-18m.
Anno Domini: Latin for "year of the Lord," the traditional designation for years of the common or Christian era.
Anthropogenic: Resulting from or produced by human beings.
Architect: A person who designs all kinds of structures.
Arithmetic Operators: Symbols and signs used in mathematics.
as: Abbreviation of attosecond a time of 10^-18seconds.
Assembly: A unit made from many parts. May refer to a molecule, machine tool, or any grouping of objects to form a larger entity.
Atomus: Latin word used in medieval times to mean "a twinkling of the eye", the smallest amount of time imaginable, defined in a precise way as 1/376 minute.
Attometre: A distance of 10^-18m.
attosecond: A time of 10^-18seconds.
Backup: An item kept available to replace an item which fails to perform satisfactorily.
Baker′s Dozen: Thirteen pieces of something.
Balthazar: The name of a wine bottle equivalent to the volume of 16 standard bottles or 12 litres.
Barrique: A large French wine barrel holding 225 litres.
Bearing: Primarily two types, rolling element and sleeve or plain bearing.
bell: Traditional unit of time used on ships. There are 8 bells in one watch of 4 hours.
Bicron: Obsolete unit of distance referencing the double prefix micron-micron and equal to 10^-12m.
bil: Abbreviation of billion, a number equal to 10⁹.
Billion: A number equal to 10⁹.
Bimester: A unit of time equal to 2 months.
Bimillennium: Unit of time equal to 2000 years.
Binary: Pertaining to a characteristic that involves the selection, choice, or condition in which there are only two possibilities.
Blunder: A gross mistake caused by carelessness or poor judgement.
Bottle: A unit of volume.
Btu: Abbreviation of British Thermal Unit.
bu: Abbreviation of Bushel.
By-Product: Material, other than the principal product, generated as a consequence of an industrial process or as a breakdown product in a living system.
Canal: An artificial channel of water used by boats and originally designed for the transportation of goods.
Capacity: The maximum amount that can be obtained.
Cardinal Points: North, South, East and West are known as the Cardinal Points.
cc: Abbreviation of Cubic Centimetre.
CE: Abbreviation of Common Era.
Centillion: A number equal to 10³⁰³.
Centre: A point or axis around which anything revolves or rotates.
Century: One hundred of something.
ch: Abbreviation of chain, an old unit of length.
Character: A letter, digit, or other symbol that is used as part of the organization, control, or representation of information.
Ci: Abbreviation of curie, a unit of radioactivity.
Civil Engineer: An engineer who plans, designs, and supervises the construction of facilities essential to modern life.
Climate Change: The average global temperature is rising sharply. Humans are contributing to the greenhouse effect by emitting greenhouse gases that trap energy and warm the atmosphere.
cm³: Abbreviation of Cubic Centimetre.
Collateral Points: North-East, North-West, South-East and South-West are known as the Collateral Points.
Common Era: Replaces AD especially in countries where Christianity is not a dominant religion.
Conversion Factor: A conversion factor is a fraction that relates one unit to another.
Core: Central region.
Cross Sectional Area: The area of a slice of an object.
Cubic Centimetre: Abbreviated as cm³ or cc.
Cunit: Measure of wood volume used in forestry equal to 100 cubic feet.
cy: Abbreviation of Cubic Yard.
dam: Abbreviation of decametre, unit length equal to 10m.
Data Mile: Unit of distance used in radar technology. The data mile equals exactly 6000 ft.
Day: Traditional unit of time marked by one rotation of the Earth on its axis.
decametre: Abbreviated as dam, unit length equal to 10m.
Decennium: A unit of time equal to 10 years.
decilitre: Abbreviated as dl, unit volume equal to 10^-1litre.
Decillion: A number equal to 10³³.
decimetre: Abbreviated as dm, unit length equal to 10^-1m.
dl: Abbreviation of decilitre, unit volume equal to 10^-1litre.
dm: Abbreviation of decimetre, unit length equal to 10^-1m.
Dots Per Inch: A unit used to measure the resolution, or sharpness of an image.
Dozen: Twelve pieces of something.
dpi: Abbreviation of Dots Per Inch.
dwt: Abbreviation of pennyweight.
Encapsulated: Imbedded in solid material or enclosed in glass or metal.
Engineers: A list of famous scientists and engineers.
Environmental Engineer: An engineer who designs and operates systems to provide safe drinking water and to prevent and control pollution in water, in the air, and on the land.
Erratic Error: An error caused by an incomplete element in an instrument.
Errors: No measurement is exact, they all contain some degree of errors.
Feet per Minute: Old imperial units of velocity, abbreviated as fpm or ft min^-1.
Female Part: A concave piece of equipment which receives a mating male, convex, part.
Femtometre: Abbreviated as fm, unit of distance equal to 10^-15m.
femtosecond: Abbreviated as fs, unit of time equal to 10^-15s.
fl oz: Abbreviation of Fluid Ounce.
fm: Abbreviation of fathom.
fm: Abbreviation of femtometre, unit of length equal to 10^-15m.
fpm: Abbreviation of Feet per Minute.
fs: Abbreviation of femtosecond, unit of time equal to 10^-15s.
ft min^-1: Abbreviation of Feet per Minute.
Function: A specific purpose of an entity; its characteristic action.
fur: A distance of one-eight of a mile.
g: Abbreviation of gram, the CGS unit of mass equal to 10^-3kg.
gal: Abbreviation of gallon.
GMT: Abbreviation of Greenwich Mean Time, local mean time at the Greenwich meridian.
Googol: A number equal to 10¹⁰⁰.
Googolplex: A number equal to 10^googol. Where a googol is 10¹⁰⁰.
gram: The CGS unit of mass equal to 10^-3kg.
gramme: Older spelling of gram, the CGS unit of mass equal to 10^-3kg.
Greenwich Mean Time: Local mean time at the Greenwich meridian.
Gross: One hundred and forty four pieces of something.
h: Abbreviation of hour, a unit of time equal to 60 minutes or 3600 seconds in length.
Half a Dozen: Six pieces of something.
Half Century: Fifty of something.
Hand: Unit of measure. Used for measuring the height of a horse.
Hour: A unit of time equal to 60 minutes or 3600 seconds in length.
hr: Abbreviation of hour, a unit of time equal to 60 minutes or 3600 seconds in length.
Hybrid: Of mixed origin or composition.
Inhale: To take into the lungs by breathing.
Inherited Error: The error in initial values used in a computation; especially the error introduced from the previous steps in a step-by-step integration.
Instant Glue: More formally known as Cyanoacrylate.
Inventor: A person who thinks up new ideas or processes.
Inversely: Inverted or reversed in position or relationship.
Inversion: Referring to something being upside down.
Invert: To change a physical or logical state to its opposite state.
ISO Paper Sizes: A series is mainly used for standard book print and stationery.
Jeroboam: The name of a wine bottle equivalent to the volume of 4 standard bottles or 3 litres.
kCal: The calorific value of food and values presented on diet sheets are normally in kCal.
kilo calories: 1000 calories.
kilo pounds per square inch: A unit of pressure used in the imperial system of units.
kilojoule: One thousand joules.
kilometre: A length equal to 1000 metres.
kip: Abbreviation of kilo pounds force.
ksi: Abbreviation for kilo pounds per square inch.
League: An old imperial unit of distance.
Line of Sight: A straight line between two points.
Linear Density: Mass per unit length.
Local Time: Time based upon the local meridian as reference, as contrasted with that based upon a zone meridian, or the meridian of Greenwich.
m³: SI unit of volume.
m³s^-1: A unit of flow rate.
Magnum: The name of a wine bottle equivalent to the volume of 2 standard bottles or 1.5 litres.
Mask: A device used to deposit materials on a substrate in the desired pattern.
Mcf: A unit of volume in the oil and gas industry for natural gas and equal to 1000 cubic feet.
Methuselah: The name of a wine bottle equivalent to the volume of 8 standard bottles or 6 litres.
Metric Ounce: A unit of mass, equal to 25 grams. Also known as a mounce.
Metric Ton: Through common usage the 1000kg has been named the Tonne.
mi: Abbreviation of mile.
Millennium: Unit of time equal to 1000 years.
Million: A number equal to 10⁶.
min: Abbreviation of minute.
Mistake: An error, usually large, resulting from a human failing or an equipment malfunction.
Model: A copy of an object that is n times smaller than the fullsize object.
Morse Code: The International Morse Code used to transmit signals by wire or by radio using short and long duration signals.
mounce: A unit of mass, equal to 25 grams.
Myria: Prefix representing a multiplication of 10⁴.
Myriagram: A unit of weight equal to ten thousand grams or 10kg.
Myrialitre: A unit of volume of ten thousand litres.
Nato Alphabet: Used when communicating over the radio to ensure there is no miscommunication of important information.
Nautical Chain: A unit of length equal to 15 feet.
Nebuchadnezzar: The name of a wine bottle equivalent to the volume of 20 standard bottles or 15 litres.
Neutral: In a normal condition.
Nonillion: A number equal to 10³⁰.
Octillion: A number equal to 10²⁷.
OEM: Abbreviation of Original Equipment Manufacturer.
Omni: Prefix meaning all.
Omnidirectional: Every direction.
Original Equipment Manufacturer: Products supplied by the company which first created the product.
Ounce Force: A derived unit of force in the British system of units.
Paint: A generally opaque coating including resin, a solvent and additives.
Paper Glue: Many different forms of paper glue, the most common being the solid stick form.
Parts Per Million by Volume: Used to describe the amount of a trace element or substance present in the main substance as measured by volume.
Parts Per Million by Weight: Used to describe the amount of a trace element or substance present in the main substance as measured by weight.
Patent: A document granting an inventor sole rights to an invention.
Per Diem: A traditional unit of frequency equal to once a day.
Per Mensem: A traditional unit of frequency equal to once a month.
Perimeter: The distance around the outside of a shape.
Perspective Drawing: A drawing in which, in order to show perspective, oblique parallel lines will meet.
Phonetic Alphabet: Used when communicating over the radio to ensure there is no miscommunication of important information.
picolitre: A volume equal to 10^-12l.
picometre: A distance equal to 10^-12 metres.
Point Type Face: Unit of measurement for type faces.
ppmv: Abbreviation of Parts Per Million by Volume.
ppmw: Abbreviation of Parts Per Million by Weight.
Preventive Maintenance: Visual, mechanical, electrical, and electronic checks that are made to determine whether or not equipment is functioning properly.
Quad: Unit of energy equivalent to 1e15 BTU.
Quadrillion: A number equal to 10¹⁵.
Quarter: One of four equal parts. An outdated British unit of weight 1 quarter = 28 pounds (lb).
Quartet: A group of four items.
Quintillion: A number equal to 10¹⁸.
Random Errors: Errors that remain after blunders and systematic errors have been removed.
Ream: 500 sheets of paper.
Recycling: The re-use of material.
Reference Line: A line to which other parts of the system are measured.
Reference Point: A point to which are other parts of the system are measured.
Rehoboam: The name of a wine bottle equivalent to the volume of 6 standard bottles or 4.5 litres.
Relative Bearing: Bearing of a target measured in a clockwise direction from "dead ahead".
Report: To document technical, economic and other issues surrounding a particular subject.
Safety Pin: A simple pin that clips shut most commonly used to fasten two pieces of fabric.
Salmanazar: The name of a wine bottle equivalent to the volume of 12 standard bottles or 9 litres.
Scientists: A list of famous scientists and engineers.
Score: Twenty pieces of something.
Seiche: An oscillation of a fluid body in response to a disturbing force having the same frequency as the natural frequency of the fluid system.
Septillion: A number equal to 10²⁴.
Sextillion: A number equal to 10²¹.
Sextuple: A group of six items.
sh cwt: Abbreviation of Short Hundredweight.
Shelf Life: The period of time that a part or system may be stored and still be useful.
Short Hundredweight: Old imperial unit of weight, equal to 100lb.
Short Ream: A quantity of paper equal to 480 sheets.
Slinch: Equal to 12 slugs, an old unit of mass.
Slot: A narrow aperture.
Spectra: Plural of spectrum.
SPF: A rating for lotions used to protect the skin against sunburn.
Splice: A joint formed by the connecting of two or more parts.
Square Mil: The area of a square, the sides of which are each equal to 1 mil.
Stability: The ability to maintain normal characteristics.
Static: A fixed nonvarying condition, without motion.
Subassembly: Consists of two or more parts that form a portion of an assembly or a unit.
Substrate: The underlying or base material.
Sun Protection Factor: A rating for lotions used to protect the skin against sunburn.
Sundial: A device for telling time of day by the shadow which sunlight produces on the instrument.
Super Glue: More formally known as Cyanoacrylate.
System: A combination of sets, units, assemblies, subassemblies, and parts joined together to form a specific operational function or several functions.
Systematic Errors: Cumulative errors that can be compensated for, if the errors are known.
Tape: A strip of long, thin, narrow material that may be rolled up.
Technical Report: A document that discusses the technical issues of a subject.
Tetrad: Unit of quantity equal to four.
Tex: The unit of linear density equal to the mass in grams per 1000 m of fibre, yarn, or other textile strand.
Thousand: A number equal to 10³.
Time Zones: The Earth is divided into 24 time zones so that everyone in the world can be on roughly similar schedules.
Tinstone: Another name for Cassiterite, a dark coloured mineral that is an important ore of Tin.
Tithe: A tenth part of something.
tnf: Abbreviation for ton force, 1 tnf=9964.02 N.
Ton Force: 1 ton-force = 9964.02 N
tonf: Abbreviation for ton force, 1 tonf=9964.02 N.
tonf in^-2: Abbreviation of Tons per Square Inch.
Tons per Square Inch: Old imperial unit of pressure, abbreviated as Tsi or tonf in^-2.
toz: Symbol for the troy ounce.
Transmission: Propagation or the passing of something through or onwards.
Triad: A unit of quantity equal to three.
Trillion: A number equal to 10¹².
Triple: A group of three items.
Trouble Tables: Tables of trouble symptoms and probable causes, furnished by many manufacturers to help technicians isolate problems.
Troubleshooting: The process of locating and diagnosing faults in equipment by means of systematic checking or analysis.
True Bearing: Angle between a target and true north measured clockwise in the horizontal plane.
True North: Geographic north.
Tsi: Abbreviation of Tons per Square Inch.
Twenty Four Hour Clock: The convention of time keeping in which the day runs from midnight to midnight and is divided into 24 hours numbered from 0 to 23.
Unidirectional: In one direction only.
Unit: A standard for comparison in measurements. For example, the metre is a standard length which may be compared to any object to describe its length.
Volume: There are a number of derived units of volume in the British system of units and the SI system of units.
watch: A traditional unit of time equal to 4 hours.
Week: Traditional unit of time equal to seven days.
Winchester Gallon: The US gallon, equivalent to 3.785411784 litres.
Wood Screws: The diameter and pilot drill size versus wood screw gauge.
Zulu Time: Another name for the 24 hour clock.