Calculators

Temperature Conversion Calculator

°F = (1.8 x °C) + 32
°C = (°F - 32) / 1.8

Fill in one value to calculate the other

°F

°C

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Three Phase Unit Calculator

Line Current = Wattage / (Voltage * √3)

Fill in two values to determine the third

Wattage

Voltage

Line Current

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Single Phase Unit Calculator

Line Current = Wattage / Voltage

Fill in two values to determine the third

Wattage

Voltage

Line Current

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Power Flowrate Temp Calculator

Calculate the electrical power, flow rate or temperature requirement as follows:

SCFM = airflow in standard cubic feet per minute
ΔT = temperature rise in degrees F from the inlet to the exhaust
Watts = SCFM x ΔT/3

Fill in two values to determine the third

SCFM

ΔT °F

Watts

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Ohms Law Calculator

Ohms Law Mage Image

Fill in two values to determine the other two

Amps (I)

Volts (E)

Watts (W)

Ohms (R)

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Heat Transfer Through Convection Calculator

ρ = density (lb/ft³)
V = volume flow rate (ft³/hour)
Cp = specific heat (Btu/lb°F)
T_a-T_b = temperature differential (°F)
Q = ρ x V x Cp x (T_a-T_b)

Fill in four values to determine the fifth

ρ

V

C_p

T_a-T_b

Q

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ACFM to SCFM Calculator

ACFM = airflow in actual cubic feet per minute
P = gage pressure (psi)
T = gas temperature °R = 460 + °F
SCFM = airflow in standard cubic feet per minute

Fill in 3 values to determine the SCFM

ACFM

P

T (°R)

SCFM

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Calculate

Mass Flow to Volumetric Flow Calculator

Mass flow rate to Volumetric flow rate for air

Fill in one value to calculate the other two

kg/h

lbs/min

SCFM

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Contact Us

Office Phone

828.684.3766

Fax

828.684.3768

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30 Legend Drive
Arden, NC 28704

Email

info@farnam-custom.com

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We conduct business primarily in English, but we can communicate in Spanish as needed with prior notice.