Well, honey, to calculate Locked Rotor Amps (LRA) to British Thermal Units (BTU), you'll need to first convert LRA to watts by multiplying it by the voltage. Then, divide the result by 3.41 to get the BTU per hour. It's as simple as that, darling.
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Divide the heat loss or gain obtained by the load calculation by square footage of the building.
There are no BTUs in an office water-cooler. But you can calculate how many BTUs are removed by the cooler. One BTU or British Thermal Unit is the amount of heat energy required to raise the temperature of one pound of water one degree Fahrenheit. There for when you remove one BTU you are lowering one pound of water one degree Fahrenheit. So if you know how many pounds of water you have and the temperature of the water you start with and the temperature of the water comming out of the cooler you can calculate how many BTUs the cooling unit of the water cooler has removed. BTU=Temp1 - Temp 2 X LB water
24,000 btu's
36000 Btu
2180 SqFt/500 = 4.4 tons of AC required x12000 BTU/ton = 52800 BTU's Answer is it takes 52800 BTU's to cool a 2180 SqFt home