Investment APIWeb Calculator UI
Free Compounding Interest & Multiplier API (2026)
Supports one-time lump sum, recurring contributions, or combined growth with customizable compounding frequencies.
Interactive API Playground & Live Test
GET
/api/v1/compoundingQuery Parameters
Initial lump sum in ₹
Recurring contribution in ₹
Annual % interest rate
Tenure in years
monthly | quarterly | yearly (default: monthly)
curl -X GET "https://fincalculator.in/api/v1/compounding?principal=100000&contribution=5000&rate=12&years=15&frequency=monthly" \
-H "Accept: application/json"Live JSON Response (HTTP 200 OK)
Click "Execute Live API Request" below...Request Parameters Schema
| Parameter | Type | Required | Description / Notes |
|---|---|---|---|
| principal | number | Optional | Initial lump sum in ₹ |
| contribution | number | Optional | Recurring contribution in ₹ |
| rate | number | Required | Annual % interest rate |
| years | number | Required | Tenure in years |
| frequency | string | Optional | monthly | quarterly | yearly (default: monthly) |