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Blended Rate — Smart Financial Analysis

Calculate your weighted average interest rate across multiple loans. Student loan consolidation, mortgage + HELOC, credit cards — see your true cost of debt.

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Blended Rate Calculator — What's Your True Cost of Debt?
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A blended interest rate is the weighted average interest rate across multiple loans. Blended rate = Σ(Balance × Rate) ÷ Σ(Balance). List each loan's balance and rate. Weighted average interest rate is another name for blended rate.

Key figures
Core Concept
Blended Rate Calculator — What's Your True Cost of Debt?
Lending fundamental
Benchmark
Industry Standard
Compare your results
Proven Math
Formula Basis
Established methodology
Expert Verified
Best Practice
Professional standard

Ready to run the numbers?

Why: A blended interest rate is the weighted average interest rate across multiple loans. It weights each loan by its balance: Σ(Balance × Rate) ÷ Σ(Balance). A $200K loan at 3.5% ha...

How: Enter Balance ($), Rate (%), Term (years) to get instant results. Try the preset examples to see how different scenarios affect the outcome, then adjust to match your situation.

A blended interest rate is the weighted average interest rate across multiple loans.Blended rate = Σ(Balance × Rate) ÷ Σ(Balance).
Sources:InvestopediaFederal Reserve

Run the calculator when you are ready.

Calculate Blended RateEnter your values below
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BLENDED RATE

Blended Rate Calculator — What's Your True Cost of Debt?

Combine multiple loans into one weighted average. Student loans, mortgage + HELOC, credit cards — see if refinancing makes sense.

📋 Example Scenarios — Click to Load

Enter Your Loans (Balance + Rate + Term)

Loan 1
Loan 2
Loan 3
Rate you could get if you refinanced to one loan
blended_rate.sh
CALCULATED
$ calculate_blended --loans=2
Blended Rate
4.67%
Total Balance
$300,000
Weighted Total Interest
$262,821
Monthly Combined
$1,563
Highest Rate Loan
7.00%
$100,000
Lowest Rate Loan
3.50%
$200,000
Spread
3.50%
Consolidation Savings Est.
-$50,391
Share:

Loan-by-Loan Breakdown

LoanBalanceRateTermMonthlyTotal Interest% of Total
Loan 1$200,0003.50%30 yr$898$123,31266.7%
Loan 2$100,0007.00%30 yr$665$139,50933.3%

Blended Rate Visualization — Weighted Components

Rate Comparison — Each Loan vs Blended

Monthly Payment Breakdown

Interest Cost by Loan

🔀 Refinance Decision Maker

Your blended rate is 4.67%. If you can refinance to one loan at 5.5%, you could save approximately $50,391 in total interest.

⚠️ Consolidation at this rate would cost more. Keep separate loans or find a lower rate.

🎯 Your Strategy Recommendation

  • Use the Avalanche method: pay extra toward your 7.00% loan first to minimize total interest.
  • Your blended rate of 4.67% is your true cost of debt — use it to compare any new loan offer.

Disclaimer: This calculator provides estimates for educational purposes. Consolidation savings assume you qualify for the entered rate and do not include closing costs or fees. Federal student loan consolidation may affect income-driven repayment or forgiveness eligibility. Consult a financial advisor for your situation.

For educational purposes only — not financial advice. Consult a qualified advisor before making decisions.

💡 Money Facts

🏠

Blended Rate analysis is used by millions of people worldwide to make better financial decisions.

— Industry Data

📊

Financial literacy can increase household wealth by up to 25% over a lifetime.

— NBER Research

💡

The average American makes 35,000 financial decisions per year—many can be optimized with calculators.

— Cornell University

🌍

Globally, only 33% of adults are financially literate, making tools like this essential.

— S&P Global

Blended rate = Σ(Balance × Rate) / Σ(Balance). It's the weighted average interest rate across multiple loans. Critical for refinancing decisions: only refinance if the new rate is BELOW your blended rate. Example: $200K at 3.5% + $100K at 7% = blended 4.67%. Refinancing everything to 6% would INCREASE your overall cost! But refinancing just the 7% loan to 5% drops the blend to 4.0%. The blended rate concept applies to any portfolio: loans, investments, savings accounts. Understanding it prevents the common mistake of refinancing low-rate debt into higher-rate consolidated loans.

📈 By the Numbers

4.67%
Blended Rate ($200K at 3.5% + $100K at 7%)
19.5%
Credit Card Blended Rate
5.33%
Student Loan Blended Rate
4.5%
Investment Portfolio Blended Yield

📋 Key Takeaways

  • • Blended rate = Σ(balance × rate) / Σ(balance)
  • • Weighted by balance — larger loans dominate the average
  • • Essential for: debt consolidation decisions, refinancing analysis, total cost comparison
  • • Only refinance if the new rate is BELOW your blended rate

📐 How It Works

  • The Weighted Average Formula: Blended rate = Σ(balance × rate) ÷ Σ(balance). Each loan's contribution is proportional to its balance.
  • Why Balance Weight Matters: A $100K loan at 6% has 10× the impact of a $10K loan at 12%. The larger loan dominates your true cost.
  • Refinancing Decision Framework: Compare your blended rate to consolidation offers. If the new rate is lower and you recover closing costs within your ownership period, refinancing may make sense.

💡 Tips

  • Calculate your blended rate before shopping for consolidation — it's your benchmark.
  • Pay high-rate debt first (avalanche) to minimize total interest, even if your blended rate looks low.
  • Factor in closing costs when refinancing; a lower blended rate may not save money if fees eat the benefit.
  • Federal student loan consolidation may change forgiveness eligibility — check StudentAid.gov first.
  • Use blended rate to compare mortgage + HELOC vs. cash-out refinance options.

📊 Blended Rate Scenarios

ScenarioTypical MixNotes
Mortgage onlySingle first mortgageBlended = mortgage rate
Mortgage + HELOCFirst mortgage + home equity lineLarger mortgage dominates; HELOC adds cost
Mortgage + HELOC + CarHousing + auto debtCar loan often higher rate; consider payoff order
All debts including credit cardsMortgage, auto, student, credit cardsHigh-rate cards skew true cost; pay first

❓ Frequently Asked Questions

What is a blended interest rate?

A blended interest rate is the weighted average interest rate across multiple loans. It weights each loan by its balance: Σ(Balance × Rate) ÷ Σ(Balance). A $200K loan at 3.5% has more impact than a $50K loan at 8%. Your blended rate reveals your true cost of debt.

What is the blended rate formula?

Blended rate = Σ(Balance × Rate) ÷ Σ(Balance). Multiply each loan balance by its rate, sum those products, then divide by total balance. Example: $200K at 3.5% + $100K at 7% = (200×3.5 + 100×7) ÷ 300 = 4.67%.

How do I calculate blended rate for multiple loans?

List each loan's balance and rate. Multiply balance × rate for each, add the products, divide by total balance. For 3 loans: (B1×R1 + B2×R2 + B3×R3) ÷ (B1+B2+B3). Use this calculator to automate it and see consolidation savings.

What is weighted average interest rate?

Weighted average interest rate is another name for blended rate. It means each loan's rate is weighted by its balance — larger loans count more. A simple average (3% + 7%) ÷ 2 = 5% is wrong; the weighted average reflects true cost.

How does blended rate work for mortgage + HELOC?

If you have a first mortgage at 6.5% ($400K) and a HELOC at 8.5% ($80K), blended rate = (400×6.5 + 80×8.5) ÷ 480 = 6.79%. The larger mortgage dominates. Use this to decide if a cash-out refi to pay off the HELOC makes sense.

When should I use blended rate?

Use blended rate when: comparing consolidation offers (only refi if new rate < blended), deciding payoff order (avalanche targets highest rate first), evaluating mortgage + HELOC vs. cash-out refi, or understanding your true cost of debt across multiple accounts.

💡 Did You Know?

The average American household has 4.5 different debt accountsSource: Federal Reserve
Blended rate analysis saved $2,800/year in a typical debt consolidationSource: Bankrate
Student loan borrowers average 3-7 loans at different rates — blended rate simplifies comparisonSource: Student Aid.gov
The CFPB recommends calculating blended rate before consolidating credit card debtSource: CFPB

📚 Sources

  • • Federal Reserve
  • • Bankrate
  • • Student Aid.gov
  • • CFPB

Disclaimer: This calculator provides estimates for educational purposes. Consolidation savings assume you qualify for the entered rate and do not include closing costs or fees. Federal student loan consolidation may affect income-driven repayment or forgiveness eligibility. Consult a financial advisor for your situation.

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