If you’re trying to convert watts to horsepower, or BTU/hr to calories per second, this Power and Heat Flow Calculator makes it easy. Whether you’re working with electrical equipment, HVAC specs, or engine data, just enter a value and select its unit. The tool instantly shows you the equivalent in all other major formats watts, BTU/hr, calories/sec, and horsepower.
Everything updates live. You can toggle rounding, unit labels, and even copy results instantly. No formulas to remember, and no guesswork.
How to Use:
- Enter a value in the input box (like
1000) - Choose the unit from the dropdown (e.g. Watts, BTU/hr, Horsepower)
- Output updates instantly in all formats
- Copy button lets you grab the full result with one click
Options:
- Round result: Reduces to 6 decimal places
- Trim trailing zeros: Cleans up
.000000endings - Show units: Adds labels (W, BTU, HP, etc.) to each line
No matter which unit you input, the result always converts to the other three units.
What the Power and Heat Flow Calculator Can Do:
Say you’re comparing the output of a space heater, or checking if your 1200W microwave is equivalent to 1.6 horsepower. This tool handles it all in one go. It’s perfect for electricians, engineers, appliance buyers, or anyone needing power unit conversions without opening Excel.
For example, enter 1 HP and you’ll get:
745.7 W2545 BTU/hr0.18 cal/sec
This is especially helpful when comparing energy specs across international or mixed-unit documents.
Example:
Input:
Value: 1
Unit: Horsepower
Round: ON
Show Units: ONOutput:
745.6999 W
2545.183 BTU
0.178214 Cal
1 HPPower and Heat Flow Table:
Here’s a quick reference of real-world items and how much power they use in different units. Useful for benchmarking your appliances or systems.
| Watts (W) | BTU/hr | Kilowatts (kW) | Application |
|---|---|---|---|
| 60 | 204.7 | 0.06 | Standard light bulb |
| 150 | 511 | 0.15 | Blender or food processor |
| 1000 | 3412 | 1.00 | Space heater or small microwave |
| 1500 | 5118 | 1.50 | Hair dryer (high setting) |
| 2000 | 6824 | 2.00 | Electric kettle or toaster oven |
| 2500 | 8530 | 2.50 | Window AC unit (12,000 BTU) |
| 4000 | 13649 | 4.00 | Tankless water heater (small) |
| 5000 | 17060 | 5.00 | EV home charger (Level 2) |
| 7500 | 25590 | 7.50 | Commercial clothes dryer |
| 10000 | 34121 | 10.00 | Central HVAC heat pump |
Common Use Cases:
People use this calculator when they’re sizing appliances for off-grid systems, converting BTUs to watts for heating specs, or cross-checking horsepower ratings for motors and machines. It’s also helpful when comparing specs between EU and US equipment, or calculating power needs for solar, HVAC, or kitchen installs.