Live Test API
Try out the Unit Converter with a live request and see the response in real-time.
API Request
API Response
123456789101112131415161718192021222324252627{ "status": "ok", "error": null, "data": { "result": { "result": 45.36, "from": "100 lb", "to": "kg" }, "unitDefinitions": { "from": { "abbr": "lb", "measure": "mass", "system": "imperial", "singular": "Pound", "plural": "Pounds" }, "to": { "abbr": "kg", "measure": "mass", "system": "metric", "singular": "Kilogram", "plural": "Kilograms" } } } }
Multiple Access Methods
REST API with multiple response formats, GraphQL, and MCP for AI agents
View all integrationsJSON
JavaScript Object Notation
XML
Extensible Markup Language
YAML
Human-readable data format
CSV
Comma-separated values
GraphQL
Query language for APIs
MCP
AI agent integration
Skip the HTTP calls. Use our official packages
Integrate faster with type-safe SDKs and comprehensive documentation
View all integrationsRelated APIs
Explore other data conversion APIs that complement the Unit Converter
Frequently Asked Questions
Get answers to common questions about the Unit Converter API
What does the Unit Converter API do?
Unit Converter is a simple tool for converting units. It returns the converted value. The API returns structured data in JSON, XML, or YAML format, making it easy to integrate into any application or workflow.
How fast is the Unit Converter API?
The Unit Converter API has an average response time of 872ms, with a median (p50) of 814ms and 99th percentile of 1256ms. Our infrastructure maintains 99.9% uptime with servers distributed globally for low latency.
How much does the Unit Converter API cost?
Each call to the Unit Converter API uses 1 credit. The free tier includes 100 credits per month. Paid plans start at $29.99/month with higher limits, and enterprise plans offer custom pricing with priority support.
How do I authenticate Unit Converter API requests?
Include your API key in the request header as X-API-Key: your_key_here. All requests are made over HTTPS for security. You can get your API key by signing up for a free account.
What HTTP methods does Unit Converter support?
The Unit Converter API supports GET requests. Simply pass your parameters as query strings in the URL. Check our documentation for detailed parameter specifications.
Ready to integrate Unit Converter API?
Join thousands of developers building amazing applications with reliable API data. Get started with your free API key today.