Calculating your total interest paid is straightforward once you know the Loan Total Interest formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Loan Total Interest Calculator.
What is Loan Total Interest?
The Loan Total Interest calculation tells you your total interest paid from a few simple inputs. The figure you are solving for here is the total interest paid, expressed in INR.
The Loan Total Interest formula
The core formula is:
Total interest paid = Loan amount × (Annual interest rate ÷ 100 ÷ 12) × (1 + Annual interest rate ÷ 100 ÷ 12)^(Loan tenure × 12) ÷ ((1 + Annual interest rate ÷ 100 ÷ 12)^(Loan tenure × 12) - 1) × Loan tenure × 12 - Loan amountHere is what each input means:
- Loan amount — a money amount. Example: ₹40,00,000.
- Annual interest rate — a percentage, such as an annual rate. Example: 9%.
- Loan tenure — a value you set on the slider. Example: 20 years.
How to calculate it step by step
- Write down the loan amount (for example, ₹40,00,000).
- Write down the annual interest rate (for example, 9%).
- Note the loan tenure (for example, 20 years).
- Apply the formula above to get your total interest paid.
- Double-check the result with the Loan Total Interest Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Loan amount | ₹40,00,000 |
| Annual interest rate | 9% |
| Loan tenure | 20 years |
| Total interest paid | ₹46,37,369 |
| Monthly EMI | ₹35,989 |
| Total amount paid | ₹86,37,369 |
With loan amount of ₹40,00,000, annual interest rate of 9% and loan tenure of 20 years, the total interest paid works out to ₹46,37,369.
Example 2
With loan amount of ₹80,00,000, annual interest rate of 9% and loan tenure of 20 years, the total interest paid works out to ₹92,74,738.
| Result | Value |
|---|---|
| Total interest paid | ₹92,74,738 |
| Monthly EMI | ₹71,978 |
| Total amount paid | ₹1,72,74,738 |
Example 3
With loan amount of ₹20,00,000, annual interest rate of 9% and loan tenure of 20 years, the total interest paid works out to ₹23,18,685.
| Result | Value |
|---|---|
| Total interest paid | ₹23,18,685 |
| Monthly EMI | ₹17,995 |
| Total amount paid | ₹43,18,685 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
- Annual rates must be converted to the period you are calculating for (for example, divide an annual rate by 12 for a monthly figure).
Prefer not to do the maths by hand? — the Loan Total Interest Calculator does it instantly, for free, with the formula and a worked example built in.
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