Current national avg:6.85%

Mortgage Calculator

Advanced planner with down payment & extra payment analysis.

Loan Details

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Monthly Payment
$0
Principal & Interest (Loan: $300,000)

Balance Payoff Logic

Making extra payments goes directly towards your Principal balance. This reduces the amount of interest charged in all future months, creating a compounding "Snowball Effect" that kills debt faster.

Smart Mortgage Planning: Real-Time Rates & Analysis

Don't just calculate your payment; optimize it. The UnitMaster Mortgage Calculator connects to live market data to give you accurate estimates. Use our Comparison Mode to shop lenders, or generate a PDF Amortization Schedule to see how extra payments save you thousands.

The 'One Extra Payment' Hack

Making just one extra mortgage payment per year towards your principal can shorten a 30-year loan by roughly 4-5 years.

Live Market Rates

See current average rates for 30-year Fixed, 15-year Fixed, and ARM loans.

PMI Integration

Automatically account for Private Mortgage Insurance if your down payment is under 20%.

Why choose UnitMaster?

  • Save $10,000+ in interest.
  • Pay off home faster.
  • Compare lenders.
  • Secure & Private.

Frequently Asked Questions

Privacy Dashboard

Processing ModeOffline Ready
Client-Side (WASM)

Calculations happen locally. No data sent to servers.

Network Requests
DESTINATION
STATUS
AnalyticsAllowed
AdSenseAllowed
File UploadsNone

Incognito Mode

Mortgage Calculator with Real-Time Rates & PDF Reports | UnitMaster - Offline Developer Tools