Math Expression Evaluator
Safely evaluate mathematical expressions with variables and built-in functions.
POST
1 credit
/v1/math-eval
curl -X POST "https://devtools.toolkitapi.io/v1/math-eval" \
-H "Content-Type: application/json" \
-d '{
"expression": "sqrt(x**2 + y**2)",
"variables": {"x": 3, "y": 4}
}'
import httpx
resp = httpx.post(
"https://devtools.toolkitapi.io/v1/math-eval",
json={
"expression": "sqrt(x**2 + y**2)",
"variables": {"x": 3, "y": 4}
},
)
print(resp.json())const resp = await fetch("https://devtools.toolkitapi.io/v1/math-eval", {
method: "POST",
headers: {
"Content-Type": "application/json",
},
body: JSON.stringify({
"expression": "sqrt(x**2 + y**2)",
"variables": {"x": 3, "y": 4}
}),
});
const data = await resp.json();
console.log(data);# See curl example
Response
200 OK
{
"result": 5.0,
"expression": "sqrt(x**2 + y**2)",
"type": "float"
}Try It Live
Live Demo
Response
Description
Safely evaluate mathematical expressions with variables and built-in functions.
How to Use
1
1. Write your math expression as a string. 2. Optionally define `variables` as key-value pairs. 3. The `result` field returns the computed value.
About This Tool
Math Expression Evaluator safely computes mathematical expressions server-side using a sandboxed evaluator. Supports variables, arithmetic operators, and a full set of built-in math functions — no arbitrary code execution.
Why Use This Tool
- Dynamic calculations — Evaluate user-defined formulas
- Spreadsheet-like math — Compute expressions with named variables
- Unit conversions — Build conversion expressions with variables
- Scientific computation — Trigonometry, logarithms, and more
Frequently Asked Questions
Is this safe from code injection?
Yes — expressions are evaluated in a sandboxed environment (simpleeval) that only allows math operations and the listed built-in functions. No file access, imports, or arbitrary code.
What operators are supported?
Standard arithmetic: `+`, `-`, `*`, `/`, `//` (floor div), `%` (modulo), `**` (power). Comparison: `==`, `!=`, `<`, `>`, `<=`, `>=`.
Start using Math Expression Evaluator now
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