Blended Rate Calculator
A blended rate is a weighted average: one interest rate that honestly represents several loans at once. If you owe $60,000 at 4% and $40,000 at 6%, your cost of borrowing is not the simple average of 5.00%, because the cheaper loan is bigger. It is 4.80%: the single rate that, applied to your total $100,000, produces exactly the $4,800 a year you actually pay. That is the number you need before a consolidation or refinance conversation, because an offer only beats your current setup if it beats 4.80% after fees, not if it beats the highest rate on your list.
The Blended Rate Calculator below blends up to five loans, showing the blended rate next to the simple average so the weighting is visible, plus total balance, total annual interest, and a per-loan table with each loan’s share of your debt. A second tab keeps the tool’s original second job: blending hourly pay rates by hours worked, for team billing and contractor quotes.
| Loan | Balance | Rate | Annual interest | Share of debt |
|---|---|---|---|---|
| – | – | – | – | – |
| – | – | – | – | – |
| – | – | – | – | – |
| – | – | – | – | – |
| – | – | – | – | – |
Rates are blended on current balances. If a rate is variable or a balance is about to change, rerun the blend after the change: last month’s blended rate describes last month’s debt.
Quick Answer
Key takeaways
- Blended rate = sum of (balance x rate) / total balance. Balances are the weights; rates never average fairly on their own.
- The result always falls between your lowest and highest rates, pulled toward the rate on your biggest balance.
- Judge any consolidation or refinance offer against the blended rate and against total annual interest in dollars, not against your single worst rate.
- A blended rate is a snapshot. Paying down the expensive loan, or a variable rate resetting, changes it.
- Quick Answer
- How the loan blend works, step by step
- Worked example: a mortgage and a card balance
- Blended rate versus simple average
- Using your blended rate on a consolidation decision
- The hourly tab: blending pay rates by hours
- When a blended rate can mislead you
- What competing calculators miss
- Frequently asked questions
- Add This Calculator to Your Website
How the loan blend works, step by step
Each loan contributes interest in proportion to its balance. The calculator multiplies every balance by its rate, adds those products, and divides by the total balance, which is the same as dividing your total annual interest by your total debt.
Multiply each balance by its rate. $60,000 x 4 = 240,000 and $40,000 x 6 = 240,000. Divided by 100, these are the annual interest dollars: $2,400 from each loan.
Add the products and the balances. Products total 480,000; balances total $100,000.
Divide. 480,000 / 100,000 = 4.80%. Sanity check: 4.80% sits between 4% and 6%, closer to 4%, because 60% of the debt is at 4%.
Worked example: a mortgage and a card balance
The loan tab is pre-filled with this pair, and the table is what the calculator returns. The detail worth staring at is the last two columns: the card is only 40% of the debt but produces half the interest, which is exactly the pattern that makes people overestimate how much a low-rate mortgage dominates their finances.
| Loan | Balance | Rate | Annual interest | Share of debt |
|---|---|---|---|---|
| Mortgage | $60,000.00 | 4% | $2,400.00 | 60.0% |
| Credit card | $40,000.00 | 6% | $2,400.00 | 40.0% |
| Total | $100,000.00 | Blended 4.80% | $4,800.00 | 100% |
Each loan contributes its rate multiplied by its share of the debt: 4% x 0.60 = 2.40 points from the mortgage and 6% x 0.40 = 2.40 points from the card. Pay the card down to $20,000 while the mortgage stays at $60,000 and the blend drops to (240,000 + 120,000) / 80,000 = 4.50%, with annual interest down to $3,600. The blend rewards attacking the high-rate balance twice: once in dollars, once in the rate itself.
Blended rate versus simple average
The simple average adds the rates and divides by how many loans you have. It answers a question nobody is asking: what would the rate be if all your loans were the same size? The calculator prints both figures side by side so the gap is a number you can see, 5.00% versus 4.80% here, a fifth of a point that is worth $200 a year on this balance.
Simple average
- (4 + 6) / 2 = 5.00% on the worked example.
- Treats a $500 card balance and a $300,000 mortgage as equals.
- Correct only when all balances are identical.
- The mistake behind many "my rate is about X" estimates.
Blended (balance-weighted) rate
- (60,000 x 4 + 40,000 x 6) / 100,000 = 4.80%.
- Weights each rate by the money actually owed at it.
- Always between the lowest and highest rates, nearer the biggest loan's rate.
- Reproduces your real annual interest: 4.80% of $100,000 is the $4,800 you pay.
The same distinction runs through business finance. Margins combine by revenue weights for exactly the reason rates combine by balance weights, and the blended margin calculator in this batch is this page's twin: same mathematics, pointed at products instead of loans. If all you need is the plain, unweighted kind of average, the average rate calculator covers that simpler question.
Using your blended rate on a consolidation decision
A consolidation offer is worth taking when its true cost beats your blended cost, and "true cost" includes fees and the new loan's term, not just its headline rate. The Consumer Financial Protection Bureau's refinance explainer makes the fee point directly: refinancing replaces one loan with another, and closing costs can eat the rate saving. Work the comparison in dollars. Your current blend costs $4,800 a year on $100,000. A consolidation at 4.50% with no fees costs $4,500, a genuine $300 a year saving. The same loan with $2,500 of fees takes over eight years to break even on rate alone, and if the term also stretches, total interest can rise while the monthly payment falls.
Two traps deserve naming. First, comparing the offer to your worst rate ("I am paying 6% on the card") instead of to the blend (4.80%) overstates the saving and is the oldest framing in lending marketing. Second, a lower blended rate after consolidation can still be a worse deal if the new loan resets a nearly finished loan back to a full term. Student borrowers should also check program-specific rules before consolidating federal loans, since Federal Student Aid's guidance on consolidation versus refinancing spells out benefits that a private refinance can permanently remove. The blend tells you your current cost truthfully; it cannot tell you what you give up.
The hourly tab: blending pay rates by hours
The second tab is the original tool on this page, and its math is the same weighted average with hours as weights. A team member at $25/hour works 10 hours and another at $40/hour works 30 hours: total cost is $250 + $1,200 = $1,450 across 40 hours, so the blended rate is $36.25/hour. Quote a client one rate for the team's time and $36.25 is the rate that exactly recovers your labour cost at that mix. Change the mix and the honest rate changes with it, which is why blended billing rates should be recomputed per project, not inherited from the last one. For costing a whole crew with roles and overheads rather than two rates, the blended labor rate calculator goes further.
When a blended rate can mislead you
The blend is exact arithmetic on the numbers you give it, and three real-world features sit outside it. It uses nominal interest rates, not APRs, so a loan with heavy fees is more expensive than its rate suggests and the blend will understate it slightly; the Federal Reserve's consumer credit statistics publish assessed interest rates for exactly this reason. It assumes the balances you enter today, so it drifts as you pay loans down at different speeds; the blend of a household paying its card aggressively improves month by month. And it says nothing about risk: a variable rate at 4% today, of the kind the Consumer Financial Protection Bureau describes in its fixed versus adjustable rate explainer, is not the same commitment as a fixed 4%, even though both enter the blend identically. Use the blended rate as your cost baseline, then judge offers on fees, term, and rate type as separate questions.
What competing calculators miss
The top tools for this keyword mostly blend two loans and stop: a formula, one example, a result. Two loans is the case you can nearly do in your head. Real debt stacks are longer, and real decisions need the dollars, not just the rate.
Winning move 1: five loans, with rows you add and remove. Mortgage, auto, student, card, and personal loans blend in one run here. The leading rivals cap at two, which forces you to blend in stages and round at every stage.
Winning move 2: the simple average, printed beside the blend. Every rival explains that weighting matters; this result shows it, with a verdict line stating how many points below or above the simple average your blend falls and why. On the worked example that gap is 0.20 points and $200 a year.
Winning move 3: annual interest and share of debt per loan. The per-loan table shows the card producing half the household's interest on 40% of the debt. That is the fact that decides what to pay down first, and no two-loan rival surfaces it.
Winning move 4: the hourly mode survives. Loan-focused rivals have nothing for team billing. This page keeps the original hourly blend with its own worked example, so the page serves both meanings of its name instead of silently dropping one.
Frequently asked questions
It is the balance-weighted average of the interest rates on several loans: sum of (balance x rate) divided by total balance. For $60,000 at 4% and $40,000 at 6%, it is 4.80%, the single rate that produces the same $4,800 annual interest on the combined $100,000.
Because loans are different sizes. The simple average treats each rate equally; the blend weights each rate by the balance owed at it. When your biggest loan has your lowest rate, the blend falls below the simple average, as in the worked example (4.80% vs 5.00%). When your biggest loan is the expensive one, the blend lands above it.
No. A weighted average always falls between the smallest and largest values being averaged. If a blended result lands outside the range of your loan rates, an input is wrong: check for a rate entered as a decimal (0.04 instead of 4) or a balance with an extra zero.
Up to five, using the Add a loan button. Rows beyond the first two start hidden and are ignored until you open them. If you hold more than five debts, group the small ones into a single row with their combined balance and their own mini-blend as the rate.
Not on the rate alone. Subtract the fees from the saving, and check the term: a lower rate over a much longer term can cost more in total interest. Compare annual interest in dollars (your blend costs $4,800 a year in the example) and the break-even time on any fees before deciding.
Yes, immediately, because the weights change. Paying off the 6% card in the example leaves only the mortgage, so the blend becomes 4.00% on $60,000. Paying down the cheap loan instead would push the blend up toward 6%, which is why payoff order matters beyond the interest saved.
Same formula, hours as weights: (rate 1 x hours 1 + rate 2 x hours 2) / total hours. At $25/hour for 10 hours and $40/hour for 30 hours, that is $1,450 / 40 = $36.25/hour. It is the single rate that exactly recovers the team's labour cost at that mix of hours.
No. This calculator blends the nominal interest rates you enter. APR folds in fees and other loan costs, so a fee-heavy loan costs more than its rate implies. If you know each loan's APR, you can enter APRs instead of rates to get a fee-aware blend, but do not mix rates and APRs in the same run.
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References
- Consumer Financial Protection Bureau, "What is a refinance?" Ask CFPB explainer on replacing a loan, closing costs, and when refinancing helps, the decision this page's blend feeds into. CFPB: What Is a Refinance?. Accessed October 2026.
- Consumer Financial Protection Bureau, "What is the difference between a fixed-rate and adjustable-rate mortgage?" Ask CFPB explainer on rate types that a blend treats identically but borrowers should not. CFPB: Fixed-Rate vs Adjustable-Rate Mortgages. Accessed October 2026.
- Consumer Financial Protection Bureau, "What is a home equity loan?" Ask CFPB explainer on the second-lien loans most often blended with a first mortgage. CFPB: What Is a Home Equity Loan?. Accessed October 2026.
- Consumer Financial Protection Bureau, "What is a debt-to-income ratio?" Ask CFPB explainer; DTI and blended rate are the two summary numbers lenders and borrowers use together. CFPB: What Is a Debt-to-Income Ratio?. Accessed October 2026.
- Federal Student Aid, US Department of Education, "Consolidate or refinance student loans": the benefits a federal loan consolidation keeps and a private refinance removes. Federal Student Aid: Consolidate or Refinance Loans. Accessed October 2026.
- Federal Reserve Bank of New York, Household Debt and Credit Report: balances by loan type, the context for typical multi-loan households. New York Fed: Household Debt and Credit. Accessed October 2026.
- Board of Governors of the Federal Reserve System, Consumer Credit G.19 release, current release: assessed interest rates on consumer loan categories. Federal Reserve: Consumer Credit G.19. Accessed October 2026.
- US Department of the Treasury, Daily Treasury Par Yield Curve Rates: benchmark rates that sit under most loan pricing. US Treasury: Daily Par Yield Curve Rates. Accessed October 2026.
- US Office of Personnel Management, Salaries and Wages policy pages: federal hourly pay structures, context for the hourly blending mode. OPM: Salaries and Wages. Accessed October 2026.
- US Department of Labor, Wage and Hour Division, Fair Labor Standards Act overview: the federal floor for hourly pay that blended billing rates are built on. DOL: Fair Labor Standards Act. Accessed October 2026.