How AI Is Changing the Way We Convert Units: Meet Alex
You know the drill. You need to know how many kilometers are in a marathon. So you open a converter, find the right page, select "miles" from a dropdown, type "26.2", and finally get your answer. It works — but it is not exactly natural.
What if you could just ask?
That is the idea behind Alex, the AI assistant built into Convert All. Instead of navigating menus and dropdowns, you type a question in plain English and get an instant answer. No forms. No confusion. Just the number you need.
What Alex Can Do
Alex understands natural language unit conversion questions. You can ask things like:
- "How many liters are in a gallon?"
- "Convert 70 kg to pounds"
- "What is 100 degrees Celsius in Fahrenheit?"
- "180 cm to feet and inches"
Alex processes your question, identifies the units and value, and gives you an accurate answer immediately. For most everyday conversions, it works entirely offline — no server calls, instant response.
For more complex or ambiguous queries, Alex connects to a backend AI model (powered by Google Gemini and Groq) to interpret your question and respond in conversational language.
Why Natural Language Matters
Traditional unit converters are built around a form: you pick units from dropdowns, enter a number, and hit a button. That works perfectly for people who already know exactly what they want to convert. But for casual users — or anyone who just wants a quick answer — it creates unnecessary friction.
Natural language removes that friction. People think in sentences, not in dropdown selections. Asking "how far is a marathon in kilometers?" is faster than navigating to the distance converter, selecting miles, selecting kilometers, and typing 26.2189.
This is not a new insight — it is why voice assistants like Siri and Google Assistant have become so popular for quick factual questions. Alex brings that same conversational experience directly into a specialized unit conversion tool.
How It Works: Local Parser + LLM Fallback
Alex uses a two-step approach:
Step 1 — Local parsing (instant, offline): Alex first tries to parse your question using a built-in local parser that recognizes common unit patterns. Questions like "convert 5 km to miles" or "70 kg in pounds" are answered instantly without any network call. This covers the majority of everyday conversions.
Step 2 — LLM fallback (for complex queries): If the local parser cannot confidently interpret the question, Alex forwards it to a large language model (Gemini, Groq, or OpenRouter, depending on availability). The LLM interprets the natural language and performs the conversion. This handles complex phrasing, ambiguous units, and multi-step questions.
The result: fast answers for simple queries, intelligent answers for complex ones.
Using Alex
Click the 💬 Alex AI button in the bottom-right corner of any page on unitconvertall.com to open the chat panel. Type your conversion question and press Enter.
You can also pick from the Popular conversions dropdown in the chat panel to quickly populate the input field with a common question.
Alex works on desktop and mobile, in all six supported languages (English, Spanish, French, German, Portuguese, and Chinese).
💡 Pro tip: If you are a developer, the same conversion engine behind Alex is available as an MCP (Model Context Protocol) server at
https://mcp.unitconvertall.com/mcp. Connect it to Claude Desktop or any MCP-compatible AI agent to use unit conversions inside your AI workflows. See the Developers page for setup instructions.
For Developers: The MCP Server
Beyond the chat widget, Convert All exposes its conversion tools as an MCP server — a standardized way for AI agents to call external tools. The MCP server provides six tools:
| Tool | What it converts |
|---|---|
convert_distance | Miles, km, feet, meters, nautical miles, inches |
convert_weight | Kg, pounds, ounces, stones, grams |
convert_temperature | Celsius, Fahrenheit, Kelvin, Rankine |
convert_volume | Liters, gallons (US/UK), cups, fluid ounces |
convert_data_storage | Bits, bytes, KB, MB, GB, TB, KiB, MiB, GiB |
get_exchange_rate | Live ECB rates for 30+ currencies |
This means you can ask Claude Desktop things like "How many liters in 5 gallons?" and Claude will call our conversion tool under the hood to give you an accurate, up-to-date answer.
What's Next
We are continuously expanding what Alex can handle. Future improvements include:
- Multi-step conversions: "Convert 5 miles to km, then tell me how long that would take to walk"
- Context-aware suggestions: If you just converted a weight, Alex will suggest related conversions like BMI or calorie burn
- Unit explanations: Ask Alex not just for a number, but for context — "What does 1 Pascal feel like?"
The goal is to make unit conversion as effortless as asking a knowledgeable friend. Alex is just the beginning.
Try Alex now — click the 💬 Alex AI button in the bottom-right corner of the page. No signup required.