Finance calculator

Debt Consolidation Calculator

Enter your existing debts — credit cards, personal loans, anything with a balance, rate, and minimum payment — and see them side by side against one new consolidation loan. Compare the monthly payment, time to debt-free, and total interest of paying them separately versus rolling them into a single loan, including an origination or processing fee rolled in or paid upfront.

Multiple debts at once Side-by-side comparison Interest & time saved Transparent assumptions

Not a loan offer — your real rate depends on the lender and your credit.

A debt consolidation calculator compares your current debts to one new loan — the same balances, but with a single rate, term, and monthly payment. It only helps when the new terms genuinely beat what you're paying now, which is what the comparison below is for.

Calculator

Everything runs in your browser — nothing you type is stored or sent anywhere. Debt names like “Visa card” are enough; do not enter account numbers.

Your existing debts (2/10)

$
%
$
$
%
$

New consolidation loan

%

The rate you expect to qualify for.

yrs

At a glance

Formula shown
payment = P × i(1+i)ⁿ / ((1+i)ⁿ − 1) — the same fixed-rate loan formula applied to the combined balance.
Scenario support
Up to 10 existing debts, a fee rolled in or paid upfront, and a per-debt payoff breakdown.
Educational estimate
Planning support from the values you enter — not professional advice.

How to read your result

The comparison panel puts "keep paying separately" and "one consolidation loan" side by side across four numbers: monthly payment, time to debt-free, total interest, and total cost. Green means consolidating wins on that line, red means it doesn't — a longer loan term can lower the monthly payment while still raising total interest, so check both, not just the payment. The summary line underneath states the trade-off in plain terms, and the per-debt breakdown shows exactly how long each existing debt would take to clear on its own minimum, flagging any that would never actually pay off.

The formula

New loan payment

payment = P × i(1+i)ⁿ / ((1+i)ⁿ − 1)

P is the combined balance (plus a financed fee), i the monthly rate (APR ÷ 12 ÷ 100), n the term in months.

Current payoff time (per debt)

n = −ln(1 − iB/A) / ln(1+i)

B is that debt's balance, A its minimum payment, i its own monthly rate. Undefined (never amortizes) when A doesn't cover the month's interest.

Worked example

Three debts: a $6,500 credit card at 22.9% APR ($195/mo minimum), a $4,200 personal loan at 13.5% APR ($140/mo), and a $1,800 store card at 26.9% APR ($65/mo) — a $12,500 combined balance and $400/mo combined minimum. Paid separately, the slowest of the three (the credit card) takes 54 months to clear, with $5,924 of total interest across all three. Consolidated into one loan at 11.5% APR over 48 months with no fee, the new payment is $326/mo$74 less than the combined minimums — total interest drops to $3,153, and it finishes 6 months sooner. Here consolidation wins on all three measures; that won't always be true, which is exactly why the comparison panel shows both sides.

Assumptions

  • The "current path" pays each existing debt at its own fixed minimum payment, in parallel, until every debt is clear — it does not reorder payments the way a snowball or avalanche strategy would.
  • The new consolidation loan is a single fixed-rate, fixed-term loan for the combined balance of every debt you enter.
  • An origination or processing fee can be rolled into the loan balance or paid upfront in cash; it is not deducted from anything else.
  • A debt whose minimum payment does not cover its own monthly interest is flagged as never amortizing on its own, rather than given a misleading payoff date.
  • Results are estimates from the values you enter — not a lender quote, pre-approval, or loan offer.

Limitations

  • Does not model a balance transfer credit card, a home equity loan or HELOC, or a debt management plan — only a standalone fixed-rate consolidation loan.
  • Does not account for a promotional or variable interest rate on your existing debts, or on the new loan.
  • Assumes you stop using the accounts you consolidate; new spending on paid-off cards is not modeled and would change the real outcome.
  • It does not guarantee loan approval, a rate, or any specific terms — actual offers depend on your credit profile and the lender.

Frequently asked questions

What is a debt consolidation calculator?

A tool that compares your existing debts — paid separately at their own minimum payments — against rolling them into one new consolidation loan. It shows the monthly payment, payoff time, and total interest on both sides so you can see the real trade-off before applying for anything.

How does debt consolidation work?

A lender pays off (or you use the loan proceeds to pay off) your existing debts, and you’re left with one new loan, one monthly payment, and one interest rate instead of several. It doesn’t erase debt — it restructures it, which can lower your rate and simplify payments, or extend how long you’re in debt if the new term is longer.

Is debt consolidation a good idea?

It depends on the numbers, not a blanket rule. Consolidation tends to help when the new rate is meaningfully lower than your blended current rate and the term isn’t stretched out so far that total interest rises. Compare your own figures above rather than assuming either outcome — a longer term can lower the monthly payment while still costing more overall.

Does debt consolidation hurt your credit?

Applying triggers a hard inquiry, which can cause a small, temporary dip, and closing paid-off accounts can shorten your average account age and change your credit utilization — both minor factors in most scoring models. Making on-time payments on the new loan and keeping utilization low afterward are generally more significant to your score over time. This calculator does not model credit scores.

Can I get a debt consolidation loan with bad credit?

It’s harder, and typically more expensive — lenders price weaker credit profiles with a higher APR, which can shrink or erase the interest savings this calculator shows. Some lenders and credit unions specialize in fair or bad-credit consolidation loans; a nonprofit credit counselor can also help evaluate a debt management plan as an alternative.

What types of lenders offer debt consolidation loans?

Banks, credit unions, and online personal-loan lenders all commonly offer them, usually as an unsecured personal loan. Some borrowers instead use a secured option like a home equity loan, which can carry a lower rate but puts the home at risk if payments are missed — this calculator models the unsecured, fixed-rate case.

Is a personal loan the same as a debt consolidation loan?

Usually, yes — "debt consolidation loan" describes how you use the money (to pay off other debts), while a personal loan is the product itself. Most consolidation loans are just personal loans used for that purpose, with the same fixed rate, fixed term, and fixed monthly payment.

Will consolidating always save me money?

No. It saves money when the new rate is low enough and the term isn’t stretched so far that total interest rises — both of which this calculator shows explicitly. A longer term can lower your monthly payment while still costing more in total interest, which the comparison panel flags rather than hides.

Should I use this or the Debt Payoff Calculator?

Use this page when you’re weighing whether to replace your existing debts with one new loan. Use the Debt Payoff Calculator when you’re keeping your debts as they are and want to find the fastest or cheapest order to pay them off (snowball, avalanche, or a custom order) — it also simulates month by month rather than the closed-form estimate used here.

What if one of my debts never pays down at the minimum?

The calculator flags it rather than showing a fake payoff date — this happens when the minimum payment is at or below the interest charged each month, so the balance never shrinks. Consolidating into a loan that actually amortizes may be the only way to clear a balance stuck like this.

Related calculators

Tools that build on the same loan and payoff math:

  • Loan CalculatorWork out the monthly payment, total interest, and payoff date for any fixed-rate loan from the amount, rate, and term.
  • Personal Loan CalculatorEstimate repayments on an unsecured personal loan and see how the rate and term change what you pay overall.
  • Debt Payoff CalculatorSimulate up to 20 debts with snowball, avalanche, custom, or hybrid payoff order and find your debt-free date.
  • Credit Card Payoff CalculatorPlan up to 20 cards with issuer-style minimums, promo APRs, five payoff orders, and a balance-transfer scenario.
  • APR CalculatorTurn a loan rate plus fees into the true annual percentage rate so you can compare offers on equal terms.

Read the guide

For the amortization formula behind any fixed-rate installment loan, worked through step by step, see How to Calculate Monthly Loan Payments Before Borrowing.

Sources

Finance disclaimer

This calculator is for educational and estimation purposes only. It is not financial, lending, credit-counseling, tax, or legal advice, and it is not a loan offer, pre-approval, or promise of any rate or term. It models a fixed-rate consolidation loan against your existing debts paid in parallel at their own minimum payments — not a snowball or avalanche payoff order, which the Debt Payoff Calculator covers separately. Your actual eligibility, rate, fees, and terms depend on the lender and your credit profile, and are not guaranteed by this tool. Confirm all numbers with your lender before making a financial decision.

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Authorship & verification

Written and maintained by

  • Formula and examples verified on 15 August 2026
  • Educational estimate only

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