Calculator
Example Data Table
| Input | From Unit | To Unit | Expected Result |
|---|---|---|---|
| 1000 | Watt | Kilowatt | 1 kW |
| 1 | Mechanical Horsepower | Watt | 745.699872 W |
| 12000 | BTU per Hour | Ton of Refrigeration | About 1 ton |
| 30 | dBm | Watt | 1 W |
Formula Used
Most units are converted through watts. The calculator first changes the entered value into watts. It then divides that watt value by the target unit factor.
Watts = Input Value × Source Unit Factor
Target Value = Watts ÷ Target Unit Factor
For dBm, the formula is different because dBm is logarithmic.
Watts = 10((dBm - 30) / 10)
dBm = 10 × log10(Watts) + 30
For dBW, watts equal 10 raised to dBW divided by 10. The reverse formula is 10 times log base 10 of watts.
The optional energy estimate uses this formula:
Energy kWh = Adjusted Watts ÷ 1000 × Hours × Duty Cycle
How to Use This Calculator
Enter the known power value first. Select the unit that matches your source value. Then select the unit you want as the final answer.
Choose decimal places and number format. Use smart format for normal work. Use scientific format for very small or very large power values.
Enter efficiency if you want adjusted output power. Add operating hours, duty cycle, and price per kilowatt-hour if you want an energy and cost estimate.
Press calculate to show the result below the header. Use CSV or PDF buttons when you need a saved copy.
Power Conversion Guide
Why Power Conversion Matters
Power units appear in many fields. Electrical work often uses watts, kilowatts, megawatts, dBm, and dBW. Mechanical work may use horsepower. Thermal systems may use BTU per hour, refrigeration tons, calories per second, or kilocalories per hour. A clear conversion method prevents mistakes when these fields overlap. This calculator keeps every result tied to watts. Watts act as the central reference unit. That makes each conversion consistent and easy to audit.
Advanced Unit Handling
Simple conversions use fixed multiplication factors. Logarithmic units need special handling. dBm and dBW describe power on a logarithmic scale. They are common in radio, audio, sensors, and signal systems. A value of 30 dBm equals one watt. A value of 0 dBW also equals one watt. These units are useful when power ranges are wide. The calculator handles these conversions with log formulas, not basic factors.
Practical Output Details
The tool also estimates adjusted power. Efficiency can represent motor loss, inverter loss, generator loss, or system loss. For example, a device may receive 1000 watts but deliver only 850 watts after losses. Duty cycle adds another practical layer. A machine may run for ten hours but work at full load for only half that period. The energy estimate reflects that usage pattern.
Better Planning
Power conversion helps during design, buying, repair, and reporting. You can compare equipment ratings from different regions. You can translate cooling capacity into electrical terms. You can check horsepower against wattage. You can also estimate energy demand before choosing a power supply, battery, panel, motor, pump, or cooling unit. Clear conversions support safer decisions and cleaner documentation.
FAQs
1. What is power conversion?
Power conversion changes one power unit into another. The calculator supports electrical, mechanical, signal, and thermal power units.
2. Why does the calculator use watts?
Watts are the base reference. Most power units can be converted into watts first, then changed into the selected target unit.
3. What is mechanical horsepower?
Mechanical horsepower is a power unit often used for engines and motors. One mechanical horsepower equals about 745.699872 watts.
4. What is dBm?
dBm is a logarithmic power unit referenced to one milliwatt. It is common in RF, signal, audio, and communication systems.
5. What is dBW?
dBW is a logarithmic power unit referenced to one watt. Zero dBW equals one watt.
6. Can I estimate energy cost?
Yes. Enter hours, duty cycle, efficiency, and price per kilowatt-hour. The calculator estimates energy use and cost.
7. Why is efficiency included?
Efficiency adjusts power for losses. It helps estimate useful output power after system, motor, inverter, or equipment losses.
8. Can I download the result?
Yes. Use the CSV button for spreadsheet data. Use the PDF button for a simple printable report.