HVAC Cooling Load Calculator
The HVAC Cooling Load Calculator estimates the cooling load (kW and tons of refrigeration) for a space from area, occupancy, equipment, and climate. Example: for a 150 m² space with 25 people, 15 kW of equipment, at 35 °C outdoor / 24 °C indoor, Cooling load = 38.66 kW, Tons = 10.99 TR, Recommended unit = 14.22 TR (per ASHRAE 62.1 | ASHRAE 90.1 | ASHRAE 55 | ASHRAE 2021 Ch.18).
How it works
Computed from your inputs per ASHRAE 62.1 | ASHRAE 90.1 | ASHRAE 55 | ASHRAE 2021 Ch.18.
Worked example (HVAC & Cooling)
Inputs: a 150 m² space with 25 people, 15 kW of equipment, at 35 °C outdoor / 24 °C indoor.
| Result | Value |
|---|---|
| Cooling load | 38.66 kW |
| Tons | 10.99 TR |
| Recommended unit | 14.22 TR |
Computed live by WorkHive's calculation engine; standard: ASHRAE 62.1 | ASHRAE 90.1 | ASHRAE 55 | ASHRAE 2021 Ch.18.
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses a 150 m² space with 25 people, 15 kW of equipment, at 35 °C outdoor / 24 °C indoor.
- The calculator returns Cooling load, Tons, Recommended unit, computed per ASHRAE 62.1 | 90.1 | 55 | Fundamentals.
- Check the worked example to confirm the method matches how you would do it by hand, then run your own numbers in the interactive tool.
FAQ
What is a HVAC cooling load calculator kW TR?
The HVAC Cooling Load Calculator is a free online tool that computes estimates the cooling load (kW and tons of refrigeration) for a space from area, occupancy, equipment, and climate. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following ASHRAE 62.1 | 90.1 | 55 | Fundamentals. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive's engineering calculators are free to use, no sign-up needed for the tools. WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive HVAC Cooling Load Calculator in WorkHive: free, no sign-up needed for the calculators.