Annuity | Calculates what the cost of an annuity loan will be depending on the loan period. |
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Cost of capital | Calculates what the interest rate will be and is used in investment calculations. |

Lcc | Do an economic analysis if a measure is profitable. |

Net present value | Calculates the present value of an investment depending on the time spent. |

Payoff | Calculates the payoff or payback time of the current investment. |

Real interest rate | Calculating the real interest rate becomes the nominal interest rate and inflation is available. |

Lighting | ||
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Calculation points | Calculates the maximum distance between measuring points to be used to calculate the illuminance. | |

Illuminance | Calculates the illuminance depending on the values available. | |

Glare | Calculates values for estimating the glare risk of luminaires outdoors and indoors. | |

Luminous flux | Calculates the luminous flux depending on the values available. | |

Luminosity | Calculates luminosity depending on the values available. | |

Spatial angle | Calculates the spatial angle from a lighting point. | |

Solar cell | ||

Global radiation | Beräknar den globala strålningen som träffar solcellsmodulen. | |

Shading | Calculates various effects that occur due to shading of the solar cell. | |

Solar cell temperature | Calculates the temperature of the solar panel depending on how it is positioned. | |

Solar power | Calculates the magnitude of power for a solar module using solar radiation. | |

Capacitance | Calculates the capacitance depending on the data available.. | |

Charge | Calculates the charge depending on the values available. | |

Conductance | Calculate the magnitude of the inductance of an electrical line. | |

Electrical power | Calculates electric power depending on the values that are available. | |

Frequency | Calculates the frequency depending on the values available. | |

Ground fault currents | Calculates the ground fault currents for the air line and cable respectively. | |

Inductance | Calculate the magnitude of the inductance of an electrical line | |

Interleaving | Calculates the total effect over the course of the day. | |

Ohm's law | Calculates the relationship between resistance, voltage and current. | |

Resistance | Calculates the resistance and resistivity of different materials. | |

Resistor | Calculates different time out for different time dependent conditions. | |

Surge protector | Calculates the risk level for whether protection against thunderbolt voltage is needed. | |

Voltage drop | Calculates the voltage drop on a line when the current or power is known. |

AHU energy | Calculates the annual energy consumption of a air handling unit. |
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Sun shielding | Calculates the solar transmittance for different variants of solar shielding. |

TEWI | Calculates the Total Equivalent Warming Impact number to be able to compare different cooling and heat pump systems. |

Transmission | Calculates the transmission losses for a room. |

Transport emissions | Calculates energy consumption and carbon dioxide emissions for different types of transport. |

U-value | Calculates the u-value depending on the material structure. |

Dew point | Calculating the dew point for the actual case. |
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Evaporation | Calculates the amount of water evaporation depending on the pool type and size. |

Humidity | Calculates how much water there can be in the air before it is condensed. |

Mollier diagram | A graphic representation of the relationship between air temperature, moisture content and enthalpy. |

Compressed air | ||
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Buffer volume | Calculates the buffer volume required to the compressor. | |

Consumption | Calculates how much compressed air consumption becomes dependent on what is connected to the system. | |

Free flow | Calculates the free flow from the normal flow depending on temperature and pressure. | |

Pressure drop | Calculates the pressure drop per meter in the current pipe depending on flow, pipe material and dimension. | |

Steam | ||

Condensate | Provide an estimate of the amount of condensate in a pipe system. | |

KV-value | Calculates the kv-value for the current valve in the steam system. | |

Steam quantity | Make an estimate of the amount of steam in a pipe system. | |

Carbon dioxide emissions | Calculates the amount of carbon dioxide emissions for different types of energy. | |

Gas bottles | Calculates how large the usable volume in a gas bottle is, as well as a compilation of different sizes and colors of gas bottles. | |

Ideala gaslagen | Calculates the pressure, volume, temperature or amount of substance for an ideal gas. | |

KV-value | Calculates what the Kv-value of a valve in a gas system will depend on flow and pressure. | |

Vacuum pump | Calculates the flow at the minimum flow a vacuum pump needs to lower the pressure within the desired time. |

ATEX | Compilation of commonly used ATEX ratings. |
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Cleanliness | Compilation of the various cleanliness classes commonly used. |

Corrosivity class | Compilation of the various corrosivity classes commonly used. |

Filter classification | Compilation of the various filter classes commonly used. |

Fire technical classes | Compilation of the various fire technical classes commonly used. |

IP-classes | Compilation of the different IP classes that exist and how they are defined. |

Compilation of the various classifications available for sprinklers. |

Carbon dioxide | Calculates the carbon dioxide content in relation to the business and the personal load on the premises. |
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Downdraft | Calculates the size of the cold race from a cold surface and whether the convection from the radiator is sufficient. |

Lokalt termiskt obehag | Calculates the percentage of a group of people who are supposed to complain due to different local phenomena. |

Hygienic limit values | Calculates the total hygienic limit value for a number of different substances and test cases. |

Wind chill | Calculates the impact of the wind on the perceived temperature. |

Bending | Calculates the moment of inertia and bending resistance for a number of different geometries. |
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Buckling | Calculate the different cracking cases found in accordance with Euler. |

Elasticity module | Calculates the modulus of elasticity depending on the strain and tension contained in the material. |

Joint | Calculates how much load a joint can take. |

Shear stress | Calculates the shear stress depending on the force and area of the cross section. |

Statics | Calculates loads and torques for a number of different load cases. |

Torsion | Calculates the torque and torque resistance for a number of different geometries. |

Wind load | Calculates the wind pressure/load that affects the building in question. |

Angle | Converts between different angular units used in the different calculations. |
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Area | Converts between different area units commonly used in the different calculations. |

Energy | Converts between different energy units commonly used in the various calculations. |

Flow | Converts between different flow units commonly used in the different calculations. |

Inch till DN | Comparison table between inches and DN commonly used for oiled tubes. |

Length | Converts between different length units commonly used in the different calculations. |

Power | Converts between different power units commonly used in the different calculations. |

Temperature | Converts between different temperature units commonly used in the various calculations. |

Time | Converts between different time units commonly used in the various calculations. |

Pressure | Converts between different pressure units commonly used in the various calculations. |

Velocity | Converts between different common velocity units. |

Viscosity | Converts between dynamic and kinematic viscosity. |

Volume | Converts between different volume units commonly used in the various calculations. |

Fan noise | Calculates how high the sound power level a fan creates depending on how much pressure it creates. |
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Filter | Calculates the sound using the more common A, B and C filter corrections used. |

Frequency | Calculates the sound frequency depending on the time interval and the critical frequency. |

Reduction number | Calculates the reduction number for a simple wall, ie how much the wall dampens the sound. |

Silencing | Calculates how much the sound is attenuated by the sound attenuation measure. |

Sound generation | Calculates how much sound is generated as the air passes. |

Sound summation | Summarizes a number of different audio sources into a single audio source. |

Sound pressure | Calculates how large the sound pressure converted from the sound effect becomes at a distance from the sound source. |

Step sound | Calculates the step sound through a floor joist depending on its structure. |

Transfer unit | Calculates how much an overhead device degrades a wall in terms of sound. |

Space specific | ||
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Battery ventilation | Calculates the flow needed to vent a battery room or battery locker to keep the hydrogen concentration below the Lower Explosive Limit (LEL). | |

Commercial kitchen | Provides the opportunity to estimate how much ventilation a kitchen may need. | |

Curtain heater | Calculates the air flow needed for a curtain heater to prevent cold draft. | |

Garage ventilation | Calculates an estimate of the airflow needed to ventilate a garage. | |

OP-ventilation | Calculates the minimum flow needed to achieve a certain particle concentration in an operating room. | |

Transformer | Calculates the air flow needed to ventilate a room with a transformer. | |

Dilution | Calculates how long it will take to get the pollution content in a room. | |

Duct | Calculates flow or velocity and pressure drop through a circular or rectangular duct. | |

Duct weight | Calculates the weight of one channel per meter of inculsive media and isolation. | |

K-factor | Calculate what k-factor it will be over the current ventilation device. | |

Leakage | Calculates the leak depending on the tightness class of the duct system. | |

Mixing temperature | Calculates the mixing temperature of different subflows with different temperatures that converge in a common duct. | |

Fan laws | Calculates how flow, pressure and power vary with the flow on the same fan and working line. | |

Flow type | Calculates whether the airflow is laminar or turbulent in the current duct. | |

Heat exchanger | Calculates the efficiency of a heat exchanger. | |

Louvres | Calculates speed through circular and rectangular louvres. | |

Natural ventilation | Calculates the thermal momentum of a natural ventilation system. | |

SFP | Calculates the specific electrical power of an air handling unit. | |

Power | Calculates how large the power demand for the ventilation system is. | |

Temperature increase | Calculates how much the temperature is raised via the fan. |

Fire water | ||
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Hose formula | Calculates how large the pressure loss through a fire hose can be. | |

Hose volume | Calculates how much water can be contained in the fire hose. | |

Reaction force | Calculates the reaction force generated by the jet nozzle. | |

Testing | Calculates flow at different unit beamlines for different available pressures. | |

Stormwater | ||

Gutter | Calculates the amount of stormwater a drain pipe can and the gutter can handle. | |

Leveling buffer | Calculates the volume and number of modules for a leveling buffer for a stormwater system. | |

Likely flow | Calculate the likely flow of stormwater from a surface. | |

Open drain | Calculates the water flow in an open drain according to Manning. | |

Sewage | ||

Buffer volume | Calculates the requisite volume of buffer for temporary storage of waste water. | |

Capacity | Calculates the capacity of the current wastewater pipeline. | |

Grease trap | Calculates the nominal size of the fat separator needed for the current plant. | |

Greywater heat exchange | Calculates the potential saving with greywater heat exchanger. | |

Likely flow | Calculates the likely flow in a sewage water pipe. | |

Pipe slope | Calculates the height of the waste water pipe with a slope. | |

Sewage norm flow | Calculates the total norm flows for various connected appliances to the wastewater system. | |

Oil separator | Calculates the nominal size of the oil separator needed for the current plant. | |

Sprinkler | ||

Color marking | A compilation of how sprinkler heads are color marked by activation temperature. | |

Sprinkler flow | Calculates the water flow coming from a sprinkler head. | |

Wait time for sprinkler | Calculating time alternatively pipe length for the flow to reach the sprinklerhead. | |

Tapwater | ||

Accumulation | Calculates the volume and power requirements of a hot water storage tank. | |

Likely flow | Calculates how large the likely the tap water flow will be. | |

Mixing flow | Calculates how much hot tap water flow is needed in the tap. | |

Hot water circulation | Calculates the flow of hot water circulation in a tap hot water system. | |

Meter | Flow conversion as well as things to consider when choosing tap water meters. | |

Norm flow | Calculates the total norm flows for tap water connected devices. | |

Wait time | Calculates how long it takes for hot water to reach the tap. | |

Affinity laws | Calculates the flow, pressure and power varies with the flow in the pump. | |

COP | Calculates the size of the cold factor or COP for the current device. | |

Culvert pipe | Calculates the amount of heat loss in ground-laid culverts. | |

Expansion vessel | Calculates the size of an expansion vessel depending on the pressure in the system. | |

Flow type | Calculates whether the flow is laminar or turbulent. | |

Heat exchanger | Calculates the efficiency of the current on the heat exchanger depending on temperatures. | |

Heat output | Calculates the amount of heat output from a radiator and values for older existing models. | |

KV-value | Calculates the kv value for the current valve depending on pressure and flow. | |

Mixing temperature | Calculates the temperature of mixing of different flow becomes one. | |

NPSH | Calculates the suction height of a pump to prevent cavitation. | |

Power | Calculates the effect or the different temperatures for a heating system. | |

Thermal expansion | Calculates the large length extension of a pipe depending on the temperatures the media has. | |

Pipe weight | Calculates the weight of one tube per meter of inculsive media and insulation. | |

Pipe volume | Calculates the volume of media in a pipe system. | |

Pool heating | Calculates how long it takes to heat a pool to the desired temperature. | |

Pressure drop | Calculates the pressure drop per meter in the current pipe. | |

Pressure stroke | Calculates the shortest time a valve can close without causing any pressure in the line. | |

Pump power | Calculates the amount of electrical power for the current pump. | |

Shunt | Beräknar hur stort flödet på primärsidan i en shunt blir. | |

Valve authority | Calculates the valve authority for the current valve depending on the pressure drop in the system. |

Terms | ||
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Hazard pictogram | A compilation of the various danger symbols used. | |

Greek alphabet | Displays a compilation of the Greek alphabet that is often used for different quantities. | |

Prefix | Displays a number of the different prefixes that are commonly used. | |

SI-enheter | Recounts and defines the various SI units that are applicable. | |

Units | A compilation of a number of different devices used on the page. | |

Geometry | ||

Circle | Calculates geometries for a circle depending on available dimensions. | |

Cone | Calculates geometries for a cone depending on the dimensions available. | |

Pyramid | Calculates geometries for a pyramid depending on the dimensions available. | |

Rectangle | Calculates geometries for a rectangle depending on the dimensions available. | |

Triangle | Calculates geometries for a triangle depending on available dimensions. | |

Material properties | ||

Air | A collection of a number of different physical properties of air. | |

Periodical table | An overview of the various elements that are presented in a periodical system. | |

Refrigerant | Properties of a number of the more common refrigerants used. | |

Substance amount | Calculates the amount of substance in the gas depending on the mass and molar mass of the substance. | |

Steam | A compilation of a number of different physical properties of steam. | |

Water | A compilation of a number of different physical properties of water. | |

Combustion | Calculates the amount of oxygen, the amount of air and the amount of flue gas in combustion. | |

Measuring accuracy | Calculates the accuracy of a measuring instrument depending on the various deviations that may occur. |

Contact | Contact form to ask questions or suggest improvements to the site. |
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Newsletter | Subscribe or unsubscribe from the newsletters sent out. |

FAQ/Search | A compilation of the most common issues that have come up as well as a search function. |
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Glossary | Glossary of some of the more common words used on the page. |

Sitemap | A compilation of the pages that the site contains. |

Terms of use | The various liability restrictions that the user needs to take a position on in order to use the site. |