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Power Converter — Free Online Tool
Power tells you how fast energy is used or delivered, and different products quote it in different units: bulbs and heaters in watts, electricity connections in kilowatts, motors and pumps in horsepower, and air conditioners in BTU per hour or tonnage. This power converter moves between watts, kilowatts, milliwatts, horsepower and BTU/hr in one step. Enter a value, pick the unit it is in and the one you need, and the answer appears with four decimals. Horsepower here is the mechanical definition of about 745.7 watts, so a 1 HP water pump draws roughly 0.75 kW at the shaft, while the electrical input is higher because of motor losses. A 1.5 tonne split AC is about 18,000 BTU/hr of cooling, which is approximately 5.3 kW of thermal power, though its electrical consumption is far lower. People in India often meet these units when buying a motor, choosing a generator or inverter capacity, comparing air conditioners, or checking that an appliance fits on a circuit. The tool converts between units only; it cannot tell you your actual electricity use, which also depends on how long a device runs. Calculations occur in your browser and no data is stored.
Use our Power Converter on AllConvertor — no registration, no download, works on iPhone, Android, Windows, and Mac. All processing runs in your browser when possible for maximum privacy and speed.
How to use Power Converter
- Enter the power value you have.
- Select the current unit, for example kilowatt.
- Select the unit you want, for example horsepower.
- Read the converted power shown below.
Key benefits
- ✓ 100% free — no paywall or trial limits
- ✓ No account or email required
- ✓ Mobile-friendly responsive design
- ✓ Instant results in your browser
- ✓ Secure — data stays on your device
- ✓ Trusted by thousands of users daily
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Frequently Asked Questions
How many watts are in one horsepower?
One mechanical horsepower is about 745.7 watts, or 0.7457 kW.
How do I convert kW to HP?
Divide kilowatts by 0.7457. For example, 3.7 kW is about 4.96 HP.
How many BTU/hr is a 1.5 ton AC?
A 1.5 ton AC is roughly 18,000 BTU/hr of cooling capacity. This tool converts BTU/hr to watts (1 BTU/hr ≈ 0.293 W).
Is power the same as energy?
No. Power is the rate of using energy (watts), while energy is the total used over time (watt-hours or kWh). Multiply power by hours to get energy.
Which power units are supported?
Watt, kilowatt, milliwatt, horsepower and BTU per hour.