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Loan Calculator

Calculate monthly payment, total interest, total repayment, fees, and amortization summary.

  • monthly payment
  • interest
  • repayment

Optional. Fixed fees are added directly; percentage fees are based on loan amount.

Optional. Applied toward principal to estimate earlier payoff and interest saved.

Status: initial

Results

Awaiting calculation

Explore your result

Loan cost beyond the payment

Explore the loan calculator result visually while keeping this page's detailed guidance and examples.

$29,634.00Total

Loan cost beyond the payment

Principal
$25,000.00
Interest
$4,634.00

Use this result well

  1. 1Verify the calculator inputs.
  2. 2Compare the key result relationships.
  3. 3Review the page guidance before acting.

An extra principal payment can reduce both payoff time and future interest.

Calculator guide

Introduction

The Loan Calculator estimates monthly payment, total interest, total repayment, fees, payoff timing, extra-payment savings, and amortization for a fixed-rate reducing-balance loan.

What is a loan calculator?

Use this calculator to compare loan payment, total cost, fees, term length, rate changes, and optional extra monthly payments before taking a personal loan, vehicle loan, education loan, business loan, or equipment loan.

Loan payment formula

The calculator uses the standard amortizing payment formula. For zero-interest loans, it divides principal by the number of months. Extra monthly payments are applied toward principal to estimate faster payoff and interest saved.

Variable explanations

Understand what each input and result means before calculating.

Loan amount

The principal borrowed before interest and fees.

Interest rate

The annual rate used to calculate monthly interest.

Loan term

The repayment duration in years or months.

Monthly payment

The estimated fixed payment due each month.

Total interest

The borrowing cost paid above the principal.

Fees

Optional fixed or percentage charges added to total cost.

Extra monthly payment

Optional additional principal payment used to estimate earlier payoff.

Amortization

A breakdown of payment, principal, interest, and remaining balance.

Reviewed by the Calculator.org.in Editorial Team

Formula behavior, validation cases, explanatory examples, and cited sources are checked before publication. This review supports educational accuracy and is not a substitute for qualified professional advice.

Last reviewed: 2026-08-03

Review process

Formula guide

See the calculation logic, variable definitions, and practical meaning.

Monthly payment

Payment = P x r x (1 + r)^n / ((1 + r)^n - 1)

  • P is loan principal.
  • r is monthly interest rate.
  • n is number of monthly payments.

This finds the fixed monthly payment required to repay principal and interest over the term.

Zero-interest loan

Payment = principal / number of months

  • Used when annual interest rate is 0%.

Without interest, each payment repays an equal portion of principal.

Total repayment

Total repayment = monthly payment x number of months

  • This excludes optional fees.

Total repayment is the sum of scheduled loan payments.

Total interest

Total interest = total repayment - principal

  • Principal is subtracted from repayment to isolate borrowing cost.

This shows the interest paid over the full term.

Total cost including fees

Total cost = total repayment + fees

  • Fees can be fixed or a percentage of loan amount.

Fees are added separately so users can see repayment and total cost.

Extra-payment payoff

New payment = scheduled payment + extra monthly payment

  • Extra payment is applied toward principal each month.

Paying extra principal can shorten payoff time and reduce future interest.

Fee share of loan

Fee share = fees / loan amount x 100

  • Fees are fixed or percentage-based charges.

This gives a quick view of how large fees are relative to the borrowed principal.

Worked examples

Follow realistic inputs through the calculation step by step.

1

Worked example

Monthly payment example

  1. 1Enter loan amount as 5,00,000.
  2. 2Enter annual rate as 10%.
  3. 3Enter 5 years.
  4. 4Review monthly payment, total interest, and total repayment.
2

Worked example

Extra payment savings

  1. 1Enter the scheduled loan details.
  2. 2Add an extra monthly payment.
  3. 3Compare payoff months and interest saved against the scheduled payment.
3

Worked example

Personal loan with processing fee

  1. 1Enter the personal loan offer.
  2. 2Add processing fees as fixed or percentage.
  3. 3Compare total repayment and total cost including fees.
4

Worked example

Term comparison

  1. 1Use the term comparison table.
  2. 2Shorter terms usually raise monthly payment.
  3. 3Longer terms usually increase total interest.
5

Worked example

Rate comparison

  1. 1Review the rate comparison table.
  2. 2Compare the selected rate with one percentage point lower and higher.
  3. 3Use the result to understand rate sensitivity.
6

Worked example

Car or vehicle loan

  1. 1Enter vehicle loan amount.
  2. 2Use the lender's annual rate.
  3. 3Review total repayment before choosing tenure.
7

Worked example

Education or business loan

  1. 1Enter the borrowed amount.
  2. 2Use the repayment term.
  3. 3Check total interest over the full duration.
8

Worked example

Short-term borrowing

  1. 1Use months for short terms.
  2. 2Check zero-interest offers carefully.
  3. 3Add any upfront fees to total cost.

Common mistakes

Avoid these common input and interpretation errors.

Ignoring fees

Processing, origination, documentation, or platform fees can increase the real borrowing cost.

Choosing a longer term only for lower payment

Longer terms can reduce monthly payment but increase total interest.

Confusing loan amount and total repayment

Loan amount is the borrowed principal; total repayment includes interest.

Comparing rates without tenure

The same rate can have very different total cost over different terms.

Ignoring prepayment terms

Some lenders may charge penalties or restrict how extra payments are applied.

Treating interest rate as APR

APR-like cost can differ from the stated rate when fees, insurance, and other charges are included.

Assuming floating rates stay fixed

This calculator assumes a fixed rate; floating-rate loans can change over time.

Frequently asked questions

Quick answers to the questions users ask most often.

What is a loan calculator?
A loan calculator estimates monthly payment, total interest, total repayment, fees, payoff timing, and amortization for a fixed-rate loan.
What formula does this calculator use?
It uses the standard amortizing loan payment formula: P x r x (1 + r)^n / ((1 + r)^n - 1).
How is monthly payment calculated?
The annual rate is converted to a monthly rate, then applied across the number of monthly payments.
How are zero-interest loans handled?
The calculator divides loan amount by the number of months.
What is total interest?
Total interest is total repayment minus the loan amount.
What is total repayment?
Total repayment is monthly payment multiplied by the number of months.
Are fees included?
Fees are shown separately and included in total cost including fees.
Can fees be a percentage?
Yes. Percentage fees are calculated on the loan amount.
Can fees be fixed?
Yes. Fixed fees are added directly.
Does extra monthly payment change payoff?
Yes. Extra monthly payment is applied toward principal to estimate earlier payoff and interest saved.
What is amortization?
Amortization shows how each payment is split between principal and interest while the balance declines.
Why does tenure affect total interest?
Longer tenure usually means more months of interest, even if monthly payment is lower.
What does the term comparison table show?
It compares estimated payment, interest, and repayment for nearby loan terms.
What does the rate comparison table show?
It compares the selected rate with one percentage point lower and higher.
Is this the same as an EMI calculator?
It uses the same core payment idea, but this page focuses on loan cost, fees, extra payment, and amortization.
Does this calculate APR?
No. It shows fees and fee share separately, but it does not compute official APR.
Can prepayment penalties change the result?
Yes. Check lender terms before using extra payments as a payoff plan.
Does this include taxes or insurance?
No. It excludes taxes, insurance, penalties, and changing interest rates.
Can floating-rate loans be calculated?
This calculator assumes a fixed rate. Floating-rate loans need updated calculations whenever the rate changes.
Why can total repayment differ from a lender quote?
Lenders may use specific day-count, rounding, fee, insurance, disbursal, or prepayment rules.
Is this financial advice?
No. It is an educational estimate; actual loan terms depend on the lender.

References

Sources used to support the calculator guidance.

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Version history

A transparent record of calculator content updates.

Updated 2026-08-03
  • 1.1.0 · 2026-08-03

    Added real extra-payment payoff logic, interest saved, fee share, payment breakdown, payoff comparison, term comparison, rate comparison, and expanded loan guidance.

  • 1.0.0 · 2026-07-03

    Initial CAL-0010 Loan Calculator implementation using platform engines.