Power Converter
Open Power Converter on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.
Tool capabilities
{
"id": "power",
"category": "unit-converters",
"built": true,
"requirements": "Specify horsepower convention and verified constants.",
"implementation": {
"fields": [
{
"key": "value",
"label": "Value",
"value": 1,
"type": "number"
},
{
"key": "from",
"label": "From",
"value": "W",
"type": "select",
"values": [
"W",
"kW",
"MW",
"hp"
],
"labels": {
"m": "Meters (m)",
"km": "Kilometers (km)",
"cm": "Centimeters (cm)",
"mm": "Millimeters (mm)",
"in": "Inches (in)",
"ft": "Feet (ft)",
"yd": "Yards (yd)",
"mi": "Miles (mi)",
"kg": "Kilograms (kg)",
"g": "Grams (g)",
"mg": "Milligrams (mg)",
"lb": "Pounds (lb)",
"oz": "Ounces (oz)",
"tonne": "Metric tonnes",
"m²": "Square meters (m²)",
"km²": "Square kilometers (km²)",
"cm²": "Square centimeters (cm²)",
"ft²": "Square feet (ft²)",
"in²": "Square inches (in²)",
"L": "Liters (L)",
"mL": "Milliliters (mL)",
"m³": "Cubic meters (m³)",
"US fl oz": "US fluid ounces",
"m/s": "Meters per second (m/s)",
"km/h": "Kilometers per hour (km/h)",
"mph": "Miles per hour (mph)",
"knot": "Knots",
"kB": "kB (10³ B)",
"MB": "MB (10⁶ B)",
"GB": "GB (10⁹ B)",
"TB": "TB (10¹² B)",
"KiB": "KiB (2¹⁰ B)",
"MiB": "MiB (2²⁰ B)",
"GiB": "GiB (2³⁰ B)",
"TiB": "TiB (2⁴⁰ B)",
"Pa": "Pascals (Pa)",
"kPa": "Kilopascals (kPa)",
"atm": "Standard atmospheres (atm)",
"psi": "Pounds per square inch (psi)",
"J": "Joules (J)",
"kJ": "Kilojoules (kJ)",
"cal": "Thermochemical calories (cal)",
"kcal": "Kilocalories (kcal)",
"Wh": "Watt-hours (Wh)",
"kWh": "Kilowatt-hours (kWh)",
"W": "Watts (W)",
"kW": "Kilowatts (kW)",
"MW": "Megawatts (MW)",
"hp": "Mechanical horsepower (hp)",
"byte": "Bytes (B)",
"bit": "Bits (bit)"
}
},
{
"key": "to",
"label": "To",
"value": "kW",
"type": "select",
"values": [
"W",
"kW",
"MW",
"hp"
],
"labels": {
"m": "Meters (m)",
"km": "Kilometers (km)",
"cm": "Centimeters (cm)",
"mm": "Millimeters (mm)",
"in": "Inches (in)",
"ft": "Feet (ft)",
"yd": "Yards (yd)",
"mi": "Miles (mi)",
"kg": "Kilograms (kg)",
"g": "Grams (g)",
"mg": "Milligrams (mg)",
"lb": "Pounds (lb)",
"oz": "Ounces (oz)",
"tonne": "Metric tonnes",
"m²": "Square meters (m²)",
"km²": "Square kilometers (km²)",
"cm²": "Square centimeters (cm²)",
"ft²": "Square feet (ft²)",
"in²": "Square inches (in²)",
"L": "Liters (L)",
"mL": "Milliliters (mL)",
"m³": "Cubic meters (m³)",
"US fl oz": "US fluid ounces",
"m/s": "Meters per second (m/s)",
"km/h": "Kilometers per hour (km/h)",
"mph": "Miles per hour (mph)",
"knot": "Knots",
"kB": "kB (10³ B)",
"MB": "MB (10⁶ B)",
"GB": "GB (10⁹ B)",
"TB": "TB (10¹² B)",
"KiB": "KiB (2¹⁰ B)",
"MiB": "MiB (2²⁰ B)",
"GiB": "GiB (2³⁰ B)",
"TiB": "TiB (2⁴⁰ B)",
"Pa": "Pascals (Pa)",
"kPa": "Kilopascals (kPa)",
"atm": "Standard atmospheres (atm)",
"psi": "Pounds per square inch (psi)",
"J": "Joules (J)",
"kJ": "Kilojoules (kJ)",
"cal": "Thermochemical calories (cal)",
"kcal": "Kilocalories (kcal)",
"Wh": "Watt-hours (Wh)",
"kWh": "Kilowatt-hours (kWh)",
"W": "Watts (W)",
"kW": "Kilowatts (kW)",
"MW": "Megawatts (MW)",
"hp": "Mechanical horsepower (hp)",
"byte": "Bytes (B)",
"bit": "Bits (bit)"
}
}
],
"input": false,
"live": true,
"presentation": "metrics",
"note": "Horsepower means mechanical horsepower. Results are rounded to 12 significant digits. Your input stays on your device.",
"experience": {
"automatic": true,
"single": false,
"inputMaxLength": 1000000,
"inputMode": "text",
"label": "Your text",
"placeholder": "Type or paste your input…",
"help": "Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.",
"helpParts": [
"Change the input or settings to update your result.",
"Results update as you type.",
"Up to 1,000,000 characters."
],
"action": null
},
"mode": "automatic",
"interactive": false
},
"execution": "POST /api/v1/tools/power/run",
"api": {
"id": "power",
"name": "Power",
"category": "unit-converters",
"description": "Convert between watts, kilowatts, megawatts, and horsepower.",
"notes": "Horsepower means mechanical horsepower. Results are rounded to 12 significant digits. Your input stays on your device.",
"human_path": "/en/unit-converters/power/",
"method": "POST",
"endpoint": "/api/v1/tools/power/run",
"schema_url": "/api/v1/tools/power",
"input_schema": {
"type": "object",
"additionalProperties": false,
"properties": {
"input": {
"type": "string",
"maxLength": 1000000,
"default": "",
"description": "Plain text input. File tools use files instead unless otherwise documented."
},
"options": {
"type": "object",
"additionalProperties": false,
"properties": {
"value": {
"type": "number",
"description": "Value",
"default": 1.0
},
"from": {
"type": "string",
"description": "From",
"default": "W",
"enum": [
"W",
"kW",
"MW",
"hp"
]
},
"to": {
"type": "string",
"description": "To",
"default": "kW",
"enum": [
"W",
"kW",
"MW",
"hp"
]
}
}
}
}
},
"output_schema": {
"type": "object",
"required": [
"tool",
"result"
],
"properties": {
"tool": {
"type": "string"
},
"result": {
"type": "object",
"required": [
"text",
"files"
],
"properties": {
"text": {
"type": [
"string",
"null"
]
},
"data": {
"description": "Parsed JSON when the textual result is JSON."
},
"name": {
"type": "string"
},
"mime": {
"type": "string"
},
"files": {
"type": "array",
"items": {
"type": "object",
"required": [
"name",
"mime",
"bytes",
"base64"
],
"properties": {
"name": {
"type": "string"
},
"mime": {
"type": "string"
},
"bytes": {
"type": "integer"
},
"base64": {
"type": "string",
"contentEncoding": "base64"
}
}
}
}
}
}
}
},
"processing": "Server; same transformation code as browser tools",
"limits": {
"request_bytes": 8388608,
"input_characters": 1000000,
"files_bytes": 5242880,
"max_files": 0,
"timeout_seconds": 12
}
},
"agent_processing": "Server; same transformation code as browser tools",
"browser_agent": {
"supported": true,
"name": "run_current_tool",
"discovery": "WebMCP on the human page in a supporting browser",
"verification": "See audit/API-AUDIT.md; availability is not verification"
}
}Page guide
Convert between watts, kilowatts, megawatts, and horsepower.
How to use Power
- Enter the values you want to calculate and choose the relevant units or settings.
- The result updates as you type. Adjust the available settings if needed.
- Review the result, then use Copy result or a download link when available.
What to expect
Convert between watts, kilowatts, megawatts, and horsepower. Enter a value and choose the source and destination units. Your result updates automatically. The calculation uses the selected units; displayed digits do not improve the accuracy of your original measurement.
Try a small example
Choose the units that match your measurement.