Using the BTU Calculator
Enter capacity in watts, not an energy total in watt-hours. BTU per hour is also a rate; the per-hour part matters. The ton output refers to refrigeration capacity and is not a measurement of equipment weight.
Worked example
Use the example inputs below to reproduce this result. These are the form's starting values, not recommended targets. Changing your inputs updates your result above; this worked example stays fixed for comparison. Results are rounded for display.
Example inputs
- Capacity (W)
- 1500
Example result
- BTU per hour
- 5,118.2124
- Kilowatts
- 1.5
- Tons of refrigeration
- 0.4265177
Method and assumptions
1 watt ≈ 3.41214 BTU/hour. Unit conversion only; room HVAC sizing requires a heat-load assessment.
Convert the quantity, not just the number
A unit conversion should preserve the underlying quantity. Start by identifying what is being measured: length, area, volume, mass, temperature or a rate. Similar unit names do not always imply the same conversion rule. Keep the destination unit attached to the answer so the converted number is not later mistaken for an input in the original unit.
Common question
Will this choose the correct air conditioner for my room?
No. It converts a capacity you already have. Room sizing requires a heat-load assessment that can account for dimensions, insulation, glazing, climate and other conditions. None of those inputs are collected here.
Guide updated .