ToolPatch

One page. One job. Done.

← Back to all tools
Financial

Loan Calculator

Calculate monthly payments and total interest for loans.

Last validated: Pending

Loan Calculator computes monthly payments, total interest, and full amortization schedules for fixed-rate loans with optional additional payments. It is useful for mortgage comparison, auto financing, and debt payoff planning. The tool provides month-by-month principal and interest breakdowns. Use it to evaluate loan refinancing or accelerated payoff scenarios.

Permalink

Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

Loan Calculator

Calculate monthly payments and total interest for loans.

Results

Loan Amount: $20,000.00

Interest Rate: 5.00%

Term: 5.0 years (60 payments)

Monthly Payment: $377.42

Total Paid: $22,645.48

Total Interest: $2,645.48

How to use this tool

  1. Enter principal, annual interest rate, and term in months or years.
  2. Run to compute monthly payment and total interest cost.
  3. Explore extra-payment scenarios to compare payoff timelines and interest savings.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

  • Principal: 20000.0
  • Annual rate: 5.0
  • Term years: 5.0
  • Monthly payment: 377.42467288021976
  • Num payments: 60

Expected Outputs

  • Principal: 20000
  • Annual rate: 5
  • Term years: 5
  • Monthly payment: 377.424673

Interpretation

Scenario Compare (A vs B)

Use this to compare two input sets and quantify change in key outputs.

Scenario A

Scenario B

Explore more versions

Tailored guides for specific audiences, regions, and scenarios.

Financial planning tools

Promote loan comparison services, financial planning software, and banking products.

Sponsored