## BTU Calculator: (ac tonnage calculator per square foot)

BTU:

Note:- Btu calculation formula for air conditioner:BTU = (20 x square footage of room) + (number of people in room x 400 BTU/person) + (number of windows x 400 BTU/window) + (number of lights x 50 BTU/light)

## w/m2k to BTU/hr-ft2-f calculator:

W/m²K:The W/m²K to BTU/hr-ft²-°F calculator is a tool that allows you to convert a value from the unit of thermal conductivity W/m²K to the unit of heat transfer BTU/hr-ft²-°F.

Thermal conductivity is a measure of how well a material conducts heat. It is typically expressed in units of W/m K, which stands for watts per meter kelvin.

This unit represents the amount of heat that is transmitted through a material per unit of time per unit of temperature difference.

Heat transfer, however, is a measure of the rate at which heat is transferred from one body to another.

It is typically expressed in units of BTU/hr-ft²-°F, which stands for British thermal units per hour per square foot per degree Fahrenheit.

This unit represents the amount of heat that is transferred from one surface to another per unit of time per unit of temperature difference per unit of area.

The W/m²K to BTU/hr-ft²-°F calculator uses a conversion factor of 0.578 to convert from W/m²K to BTU/hr-ft²-°F.

This conversion factor is based on the fact that 1 BTU equals 1,055 joules, and 1 joule equals 1 watt second.

## Cast iron radiator BTU calculator:

**Formula:**

BTU = (Height (in inches) x Width (in inches) x 193) / 144

This formula takes into account the size of the radiator (height and width in inches), as well as the heat-transfer coefficient of cast iron (193 BTUs per hour per square foot per degree Fahrenheit).

The result is then divided by 144 to convert the output to BTUs per hour.

For example, if you have a cast iron radiator that is 24 inches tall and 48 inches wide, the BTU output would be calculated as follows:

BTU = (24 x 48 x 193) / 144 = 222336 / 144 = 1544 BTUs per hour.

Keep in mind that this is just a rough estimate, and the actual BTU output of a radiator may vary depending on factors.

Such as the temperature of the water in the radiator, the ambient temperature in the room, and the insulation of the room.

## BTU to GPM calculator:

BTU stands for British Thermal Unit, and it is a unit of energy used to measure the heating or cooling capacity of a system. GPM stands for gallons per minute, and it is a unit of flow rate that measures the volume of liquid that flows through a pipe or system over a certain period of time.

To convert BTU to GPM, you need to know the specific heat of the fluid being used, the temperature change of the fluid, and the time over which the fluid flows. Here is the formula for the conversion:

**GPM = (BTU/hr) / (8.33 x (fluid’s specific heat) x (temperature change in degrees Fahrenheit))**

For example, let’s say you want to convert 1,000 BTU/hr to GPM and the specific heat of the fluid is 1.0 and the temperature change is 50 degrees Fahrenheit. Using the formula above, the conversion would be:

GPM = (1,000 BTU/hr) / (8.33 x 1.0 x 50)

GPM = 0.6 gallons per minute

## BTU to therm calculator:

A therm is a unit of energy equal to 100,000 BTUs (British Thermal Units). To convert BTUs to therms, you can use the following formula:

**Therms = BTUs / 100,000**

For example, if you want to convert 1,000 BTUs to therms, the calculation would be:

Therms = 1,000 BTUs / 100,000 = 0.01 therms

## lb/hr to btu/hr calculator

BTU/hr:

You know, 1 lb/hr = 2,326 BTUs/hr. So, to convert from lb/hr to BTUs/hr, multiply the number of pounds per hour by 2,326. For example, if you have 50 lb/hr:

50 lb/hr * 2,326 BTUs/hr = 116,300 BTUs/hr

Here is the formula you can use:

BTUs/hr = lb/hr * 2,326