Debt Consolidation Calculator — Itemize Every Debt, See the Real Math

A debt consolidation calculator that only accepts a single total balance hides the one number that actually decides whether consolidating is worth it: your true weighted-average interest rate across every debt you carry. This calculator itemizes up to five separate debts — balance, APR, and minimum payment for each — and compares the real cost of paying them off individually against a single consolidation loan, using your actual weighted-average rate as the benchmark rather than a rough guess.

Arb Digital built this as the itemized companion to a simpler single-total debt refinance tool. If you already know your combined balance and blended rate and just want a quick refinance comparison, use our debt refinance calculator instead. This page is for the more common real-world situation: several cards and loans at different rates, where the averaging itself is half the problem.

What This Debt Consolidation Calculator Does

Enter each debt you're carrying — its name, current balance, APR, and minimum payment — for up to five debts. The calculator adds up your total balance and total minimum payments, then computes your weighted-average current APR: the rate that reflects how much of your total debt sits at each interest level, not a simple unweighted average of the percentages themselves. Then enter the consolidation loan you're considering — its APR, term in months, and any origination fee — and the calculator compares the two paths side by side: what you'd pay in total interest keeping every debt separate at its own minimum payment, versus what you'd pay rolling everything into one new loan.

How to Use It

1. List each debt. Fill in the name, balance, APR, and minimum monthly payment for every card or loan you're considering consolidating.
2. Leave any unused rows at zero if you have fewer than five debts — they're simply excluded from the totals.
3. Enter the consolidation offer. The new loan's APR, its term in months, and the lender's origination fee percentage.
4. Click Compare to see your weighted-average current rate, the new monthly payment, the fee cost, and the total interest saved or lost.

The Formula: Why "Weighted" Average Matters

Your weighted-average APR is calculated by multiplying each debt's balance by its own APR, summing those products across every debt, and dividing by your total balance. A $6,000 balance at 24% pulls the average up far more than a $1,200 balance at 27%, simply because there's five times more money sitting at that higher rate. This is the number a consolidation offer actually needs to beat — comparing a new loan's rate against your single worst card, or against a naive average of the percentages themselves, routinely leads people to consolidate into a "lower" rate that is actually higher than what they were really paying blended across their whole balance. The Consumer Financial Protection Bureau and the Investopedia guide to debt consolidation both stress running the real numbers before signing a consolidation loan, precisely because the math is easy to get wrong by eyeballing it.

A Worked Example

Picture five debts: a $6,000 card at 24%, a $3,500 card at 19%, a $1,200 store card at 27%, an $8,000 personal loan at 12%, and a $2,000 medical bill at 0%. Add those balances up and you're carrying $20,700 across five accounts, and the weighted-average calculation — each balance times its own rate, summed, then divided by the $20,700 total — lands meaningfully below the 27% top rate, because the largest single balance sits at just 12%. A consolidation offer at 11% genuinely beats that blended figure, which is exactly the kind of case where consolidating makes sense. Change the mix — say, push more of the total balance onto the 27% store card — and the weighted average climbs, changing whether the same 11% offer still wins. That's the entire reason itemizing matters: the same five interest rates can produce a very different verdict depending on how the dollars are actually distributed across them.

Now add the minimum payments: $150, $90, $40, $220, and $50 — $550 a month total, just to service the minimums across five separate due dates. A consolidation loan that combines all $20,700 (plus a rolled-in origination fee) into one payment over four years produces a single monthly figure to compare directly against that $550. Whether the new payment is higher or lower than the current combined minimum, and whether the total interest paid over the full comparison is lower, are two separate questions this calculator answers side by side rather than conflating into one.

The Fee Can Eat the Gap Between Rates

Even when a consolidation loan's APR genuinely beats your weighted-average rate, an origination fee rolled into the balance adds cost from day one that the rate difference has to overcome before you come out ahead. A 3% fee on a $20,000 consolidated balance is $600 added to what you owe before a single month of the new, lower rate has had a chance to save you anything. This calculator finances the fee into the new loan balance, the way most lenders structure it, and reports the dollar cost of that fee separately from the interest comparison — so you can see exactly how much of a head start the fee gives away before judging whether the lower rate still wins overall.

A Longer Term Can Lower the Payment and Still Cost You More

Stretching a consolidation loan's term is the easiest way to shrink the new monthly payment, and it's also the easiest way to quietly raise your total interest cost even while your rate genuinely drops. A lower APR spread across more months can still produce a bigger lifetime interest bill than paying your current debts off faster at their higher blended rate, simply because interest keeps accruing for longer. Always check both figures this calculator shows — the new payment against your current total minimums, and the total interest saved or lost — rather than judging the deal on the payment drop alone. A smaller monthly number is not automatically a cheaper loan.

Secured vs. Unsecured Consolidation Loans

Consolidation loans come in both unsecured and secured forms, and the difference matters beyond the interest rate. An unsecured personal loan consolidates your debts without putting any asset at risk, but typically carries a higher rate than a secured option, since the lender has no collateral to fall back on. A home equity loan or line of credit used for consolidation can offer a meaningfully lower rate, but it converts what was unsecured credit-card debt into debt secured by your house — meaning a default carries the risk of foreclosure that ordinary credit-card default does not. Before choosing a secured consolidation route purely for the lower rate, weigh that risk change explicitly rather than treating the two options as differing only in APR.

The Real Killer: Running the Cards Back Up

The math above assumes your old accounts stay at zero once consolidated. The single most common way debt consolidation fails isn't a bad rate or a hidden fee — it's closing out old balances onto a clean consolidation loan and then gradually running the original cards back up, ending with both the new loan payment and a fresh round of card debt on top of it. If you consolidate, treat it as a one-time reset that requires closing or freezing the paid-off accounts, not a tool you can repeat every time balances creep back up. No calculator can model willpower, but it's the variable that decides whether this exercise actually saves you money in three years or simply doubles your debt.

Common Mistakes to Avoid

• Comparing the new rate to your worst card instead of your weighted average. The weighted-average figure is the true benchmark a consolidation offer needs to beat.
• Ignoring the origination fee. A rolled-in fee adds real cost before the lower rate has done any work.
• Choosing the longest available term to shrink the payment. That often raises total interest even when the rate drops.
• Leaving old accounts open and active. Consolidating without closing or freezing paid-off cards is the most common reason people end up worse off.
• Skipping a 0% balance on your list. A promotional 0% APR debt, like some medical bills, should usually be paid on its own terms rather than folded into a higher-rate consolidation loan.

Related Free Tools From Arb Digital

Compare a simpler single-total refinance with our debt refinance calculator, or attack balances without a new loan using the debt snowball calculator. See a full payment-by-payment view of any resulting loan with the loan amortization schedule calculator, and check what extra payments could save with the extra payment loan calculator. Browse everything in our free online tools hub.

Frequently Asked Questions

This tool provides general estimates for educational purposes only and is not financial, tax, legal, or medical advice. Figures are illustrative; consult a licensed professional for decisions.