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Duct Size Calculator

Temperature:	[°C]
Flow rate:	[m3/hr]
Duct Size:
Select Pipe Type:	Circle Pipe Rectangular Pipe
Internal Diameter:	[mm]
Width:	[mm]
Roughness height:	[mm]
Pipe Lenght:	[m]
Equivalent diameter:		[mm]
Flow Area:		[m2]
Flow Viscosity:		[Kg/m.s]
Flow Velocity:		[m/s]
Flow Density:		[Kg/m3]
Reynolds Number:
Friction Factor:
Velocity Pressure:		Pa
Pressure drop:		Pa/m
Total pressure drop on Pipe:		Pa

Full load current calculator

LOAD INFORMATION
Voltage (V):		3 Phase AC 1 Phase AC DC
Load (S):		kW kVA hp
Power factor (cosΦ):
Efficiency (E):		[%]
For motor only
Frequency (F):		[Hz]
Poles (P):
Motor Syncronus Speed:		[Rpm]
The result
Full load current:		[A]

Parameters:
The full load current calculator calculates following as:
3-phase AC supply:
 - Load is kW is calculated as:

 - Load is kVA is calculated as:

 - Load is HP is calculated as:

1-phase AC supply:
 - Load is kW is calculated as:

 - Load is kVA is calculated as:

 - Load is HP is calculated as:

DC supply:
 - Load is kW is calculated as:

 - Load is kVA is calculated as:

 - Load is HP is calculated as:

Air Conditionner

Air Condition Size Calculator for Room

ROOM SIZE:
Length:		[m]
Width:		[m]
Height:		[m]
Total Area:		[m2]
Required Cooling Load of Room:		[Btu/Hr]
COOLING FACTORS:
Capacity (Number of People):
Kitchen in the room:	No Yes
Windows in West or East side:	Area: [m2]	Q'ty:
Windows in North side:	Area: [m2]	Q'ty:
Windows in South side:	Area: [m2]	Q'ty:
Blinds on The windows:	Yes No
Total Electrical Equipment Load:		[Watt]
Total Lighting Fixtures Load:		[Watt]
SIZE OF AIR CONDITIONER:
Total Cooling Capacity Required:		[Btu/hr]
Required A.C (HP):		[Hp]
Required A.C (KW):		[kW]

AF-Pressure

Dynamic pressure:

                 

where

- P : Dynamic pressure (N/m² (Pa), lb_f/ft² (psf))

- ρ : Density of fluid (kg/m³)

- v : Velocity (m/s, ft/s)

Pressure drop:

- ƒ : Friction Factor
- L : Length of Pipe (m)
- D: Pipe Diameter (m)
- ρ : Density of fluid (kg/m³)
- v : Velocity (m/s)

Pressure Calculator

Density (ρ):	[kg/m3]
Velocity (v):	[m/s]
Internal Diameter (D):	[mm]
Length of Pipe (L):	[m]
Friction Factor (ƒ):
Dynamic Pressure (p):	[Pa]
Pressure drop (Δp):	[Pa]

AF-Friction factor

Darcy friction factor formulae:

 - Re: Reynolds number
 - D: Pipe diameter (m)
 - ε: Roughness height (m) (More detail show as table below).

Darcy friction factor calculator

Reynolds Number (Re):
Roughness height (𝜀):	[mm]
Internal Diameter (D):	[mm]
Friction factor (ƒ):

Roughness height table:

Surface	Absolute Roughness height ε
	(x10-3 m) or (mm)
Copper, Lead, Brass, Aluminum (new)	0.001 - 0.002
PVC and Plastic Pipes	0.0015 - 0.007
Stainless steel, bead blasted	0.001 - 0.006
Stainless steel, turned	0.0004 - 0.006
Stainless steel, electropolished	0.0001 - 0.0008
Steel commercial pipe	0.045 - 0.09
Stretched steel	0.015
Weld steel	0.045
Galvanized steel	0.15
Rusted steel (corrosion)	0.15 - 4
New cast iron	0.25 - 0.8
Worn cast iron	0.8 - 1.5
Rusty cast iron	1.5 - 2.5
Sheet or asphalted cast iron	0.01 - 0.015
Smoothed cement	0.3
Ordinary concrete	0.3 - 1
Coarse concrete	0.3 - 5
Well planed wood	0.18 - 0.9
Ordinary wood	5

AF-Reynolds number

The Reynolds number is defined as

where:

- ρ is the density of the fluid (SI units: kg/m3).
- u is the velocity of the fluid with respect to the object (m/s).
- L is the Internal diameter of piper (m).
- μ is the dynamic viscosity of the fluid (Pa·s or N·s/m2 or kg/m·s).
- ν is the kinematic viscosity of the fluid (m2/s).

The Reynolds number calculator

Air/Fluid Density (ρ):	[kg/m3]
Air/Fluid Velocity (u):	[m/s]
Internal Diameter (L):	[mm]
Dynamic Viscosity (µ):	[Pa·s or N·s/m2 or kg/m·s]
Kinematic Viscosity (ν):	[m2/s]
Reynolds Number (Re):

AF-Velocity

Fluid Velocity Calculator

Fluid Velocity Calculator
Air/Fluid Flow:	[m3/h]
Air/Fluid Flow:	[L/s]
Select Pipe Type:	Circle Pipe Rectangular Pipe
Internal Diameter:	[mm]
Width:	[mm]
The Result
Pipe Area:
Fluid Velocity:

AF-Density

The density, the volumetric mass density, of a substance is its mass per unit volume of the Earth's atmosphere

Air density calculation:

D: Density - (kg / m³)
P:  Pressure, Pascals : 101400 Pa
R: Specific gas constant , J/(kg*degK) = 287.05 for dry air
T: Temperature, deg C (°C)

Pressure:		Pa kPa mPa bar
Temperature:		[°C]
Gases Name:	Air dry Acetylene - C2H2 Ammonia - NH3 Argon - Ar Butane - C4H10 Butene - C4H8 Carbon Dioxide - CO2 Carbon Monoxide -CO Carbonic acid - H2CO3 Chlorine - Cl2 Chloromethane - CH3Cl Dichlorofluorumethane - CHCl2F Ethane - C2H6 Ethene - C2H4 Fluorine - F2 Helium - He Hydrogen -H2 Hydrogen bromide - HBr Hydrogen chloride - HCl Hydrogen sulfide - H2S Krypton - Kr Methane (natural gas)- CH4 Neon - Ne Nitrogen - N2 Nitrogen dioxide - NO2 Nitrogen trifluoride -NF3 Nitrous oxide - N2O Oxygen - O2 Propane - C3H8 Propene - C3H6 Sulfur dioxide - SO2 Sulfur hexafluoride - SF6 Sulfur trioxide - SO3 Water vapor - H2O Xenon -Xe
Density:		[Kg/m3]

Water density calculation (T °C ):

Water Temperature		[°C]
Density		[kg/m3]

Below table is density of liquids:

Liquid	Temperature	Density
	(°C)	(kg/m3)
Acetic Acid	25	1049
Acetone	25	784.6
Acetonitrile	20	782
Alcohol, ethyl (ethanol)	25	785.1
Alcohol, methyl (methanol)	25	786.5
Alcohol, propyl	25	800
Ammonia (aqua)	25	823.5
Aniline	25	1019
Automobile oils	15	880 - 940
Beer (varies)	10	1010
Benzene	25	873.8
Benzil	15	1230
Brine	15	1230
Bromine	25	3120
Butyric Acid	20	959
Butane	25	599
n-Butyl Acetate	20	880
n-Butyl Alcohol	20	810
n-Butylhloride	20	886
Caproic acid	25	921
Carbolic acid (phenol)	15	956
Carbon disulfide	25	1261
Carbon tetrachloride	25	1584
Carene	25	857
Castor oil	25	956.1
Chloride	25	1560
Chlorobenzene	20	1106
Chloroform	20	1489
Chloroform	25	1465
Citric acid, 50% aqueous solution	15	1220
Coconut oil	15	924
Cotton seed oil	15	926
Cresol	25	1024
Creosote	15	1067
Crude oil, 48o API	60oF	790
Crude oil, 40o API	60oF	825
Crude oil, 35.6o API	60oF	847
Crude oil, 32.6o API	60oF	862
Crude oil, California	60oF	915
Crude oil, Mexican	60oF	973
Crude oil, Texas	60oF	873
Cumene	25	860
Cyclohexane	20	779
Cyclopentane	20	745
Decane	25	726.3
Diesel fuel oil 20 to 60	15	820 - 950
Diethyl ether	20	714
o-Dichlorobenzene	20	1306
Dichloromethane	20	1326
Diethylene glycol	15	1120
Dichloromethane	20	1326
Dimethyl Acetamide	20	942
N,N-Dimethylformamide	20	949
Dimethyl Sulfoxide	20	1100
Dodecane	25	754.6
Ethane	-89	570
Ether	25	713.5
Ethylamine	16	681
Ethyl Acetate	20	901
Ethyl Alcohol (Ethanol, pure alcohol, grain alcohol or drinking alcohol)	20	789
Ethyl Ether	20	713
Ethylene Dichloride	20	1253
Ethylene glycol	25	1097
Trichlorofluoromethane refrigerant R-11	25	1476
Dichlorodifluoromethane refrigerant R-12	25	1311
Chlorodifluoromethane refrigerant R-22	25	1194
Formaldehyde	45	812
Formic acid 10% concentration	20	1025
Formic acid 80% concentration	20	1221
Fuel oil	60oF	890
Furan	25	1416
Furforol	25	1155
Gasoline, natural	60oF	711
Gasoline, Vehicle	60oF	737
Gas oils	60oF	890
Glucose	60oF	1350 - 1440
Glycerine	25	1259
Glycerol	25	1126
Heating oil	20	920
Heptane	25	679.5
Hexane	25	654.8
Hexanol	25	811
Hexene	25	671
Hydrazine	25	795
Ionene	25	932
Isobutyl Alcohol	20	802
Iso-Octane	20	692
Isopropyl Alcohol	20	785
Isopropyl Myristate	20	853
Kerosene	60oF	820.1
Linolenic Acid	25	897
Linseed oil	25	929.1
Machine oil	20	910
Mercury		13590
Methane	-164	465
Methanol	20	791
Methyl Isoamyl Ketone	20	888
Methyl Isobutyl Ketone	20	801
Methyl n-Propyl Ketone	20	808
Methyl t-Butyl Ether	20	741
N-Methylpyrrolidone	20	1030
Methyl Ethyl Ketone	20	805
Milk	15	1020 - 1050
Naphtha	15	665
Naphtha, wood	25	960
Napthalene	25	820
Nitric acid	0	1560
Ocimene	25	798
Octane	15	698.6
Oil of resin	20	940
Oil of turpentine	20	870
Oil, lubricating	20	900
Olive oil	20	800 - 920
Oxygen (liquid)	-183	1140
Paraffin		800
Palmitic Acid	25	851
Pentane	20	626
Pentane	25	625
Perchlor ethylene	20	1620
Petroleum Ether	20	640
Petrol, natural	60oF	711
Petrol, Vehicle	60oF	737
Phenol (carbolic acid)	25	1072
Phosgene	0	1378
Phytadiene	25	823
Pinene	25	857
Propane	-40	493.5
Propane, R-290	25	494
Propanol	25	804
Propylenearbonate	20	1201
Propylene	25	514.4
Propylene glycol	25	965.3
Pyridine	25	979
Pyrrole	25	966
Rape seed oil	20	920
Resorcinol	25	1269
Rosin oil	15	980
Sea water	25	1025
Silane	25	718
Silicone oil	25	965 - 980
Sodium Hydroxide (caustic soda)	15	1250
Sorbaldehyde	25	895
Soya bean oil	15	924 - 928
Stearic Acid	25	891
Sulfuric Acid 95% concentration	20	1839
Sulfurus acid	-20	1490
Sugar solution 68 brix	15	1338
Sunflower oil	20	920
Styrene	25	903
Terpinene	25	847
Tetrahydrofuran	20	888
Toluene	20	867
Trichlor ethylene	20	1470
Triethylamine	20	728
Trifluoroacetic Acid	20	1489
Turpentine	25	868.2
Water, heavy	11.6	1105
Water - pure	4	1000
Water - sea	77oF	1022
Whale oil	15	925
o-Xylene	20	880

AF-Viscosity

Water Viscosity Calculator:
Temperature (°C):
Salinity (ppt):
Pressure (bar):
Density ρ (kg/m3):
Dynamic Viscosity µ (Kg/m.s, Pa.s, N.s/m2):
Dynamic Viscosity µ (mPa.s):
Kinematic Viscosity (m2/s):
Gases Viscosity Calculator:
Select gases:	Standard air Ammonia, NH3 Carbon dioxide, CO2 Carbon monoxide, CO Hydrogen, H2 Nitrogen, N2 Oxygen, O2 Sulfur dioxide, SO2
Temperature (°C):
Dynamic Viscosity: (Kg/m.s, Pa.s, N.s/m2):
Dynamic Viscosity: (mPa.s):