finance ToolUpdated 2026-09-19
Mortgage Calculator
Plan your home purchase by calculating your monthly mortgage payments, interest expenses, and loan balance breakdown.
Financial & Loan Estimation Notice: Calculations provided are estimates for personal educational planning. Actual loan terms, payment amounts, taxes, and interest charges will vary based on lender underwriting, individual creditworthiness, local statutory regulations, and market conditions.
Formula & Mathematical Methodology
M = P × [r(1 + r)ⁿ] ÷ [(1 + r)ⁿ − 1]
Calculates the fixed monthly principal and interest installment across standard 15-year or 30-year terms.
How to Use This Mortgage Calculator
- Enter the home loan amount.
- Provide your interest rate.
- Set term (e.g. 30 years).
- Review payment breakdown.
Step-by-Step Worked Example
Scenario: $350,000 mortgage at 6.8% for 30 years
1. Monthly rate: 6.8% ÷ 12 = 0.5667%
2. Total payments: 360 months
3. Monthly Principal & Interest: $2,281.93
Final Calculated Result: $2,281.93 / month
What Does Your Result Mean?
Shows the base principal and interest payment. Property taxes and homeowners insurance are typically added in escrow.
Common Practical Applications:
- First-time homebuyer budgeting
- Refinancing evaluations
- Real estate investment analysis
Important Limitations & Assumptions:
- Excludes private mortgage insurance (PMI), HOA fees, and annual property taxes.
Frequently Asked Questions
What is the difference between a 15-year and 30-year mortgage?
A 15-year mortgage has higher monthly payments but substantially lower lifetime interest costs.
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