EMI Calculator API

Calculate your monthly EMI, total interest, and total payment for any loan — home, car, or personal.

◎ Category: Calculators ◎ Endpoint: /v1/calculators/emi Method: GET Auth: None

Accurate Calculation

Get precise EMI and loan breakdown using the standard PMT formula.

Detailed Breakdown

Principal, interest, total payment and amortization details.

Easy Integration

Simple REST API with clean JSON response.

Developer Friendly

Clear docs, multiple SDK examples and fast response.

⏳

API Coming Soon

This endpoint is in active development. Documentation is published early so you can plan your integration. Join the waitlist to get notified when it goes live.

Endpoint

All requests should be made to the following endpoint:

GET https://api.tools.town/v1/calculators/emi

Authentication

No API key required. This endpoint is free to call up to 1,000 requests/month without authentication.

Request Parameters

Send a GET request with query parameters.

Parameter	Type	Required	Description	Example
`principal`	`number`	✓	Loan amount in the base currency (e.g. rupees or dollars).	`500000`
`rate`	`number`	✓	Annual interest rate as a percentage (e.g. 8.5 for 8.5%).	`8.5`
`tenure`	`number`	✓	Loan duration in months.	`60`

Example Request

curl -G "https://api.tools.town/v1/calculators/emi" \
  --data-urlencode "principal=500000" \
  --data-urlencode "rate=8.5" \
  --data-urlencode "tenure=60"

import requests

response = requests.get(
    "https://api.tools.town/v1/calculators/emi",
    params={
        "principal": 500000,
        "rate": 8.5,
        "tenure": 60
    }
)
print(response.json())

<?php
$query = http_build_query([
  "principal" => 500000,
  "rate" => 8.5,
  "tenure" => 60
]);
$ch = curl_init("https://api.tools.town/v1/calculators/emi?$query");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);
echo $result;

const params = new URLSearchParams({
  principal: "500000",
  rate: "8.5",
  tenure: "60"
});

const response = await fetch(
  `https://api.tools.town/v1/calculators/emi?${params}`
);

const data = await response.json();
console.log(data);

const fetch = require("node-fetch");

const params = new URLSearchParams({
  principal: "500000",
  rate: "8.5",
  tenure: "60"
});

const response = await fetch(
  `https://api.tools.town/v1/calculators/emi?${params}`
);

const data = await response.json();
console.log(data);

Example Response 200 OK

application/json

{
  "success": true,
  "data": {
    "emi": "10379.73",
    "totalInterest": "122783.8",
    "totalPayment": "622783.8",
    "principalPercent": "80.28",
    "interestPercent": "19.72"
  }
}

Error Codes

Code	Meaning
400	Bad Request — missing or invalid parameter
401	Unauthorized — API key missing or invalid
429	Rate limit exceeded — free tier: 1,000 requests/month
500	Internal Server Error — try again or contact support

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