Debt Consolidation Calculator

What debt consolidation really means

Debt consolidation is the act of combining several separate balances — credit cards, store cards, medical bills, other personal loans — into a single new loan with one monthly payment. The appeal is twofold: simplicity, because you track one due date instead of many, and ideally a lower blended interest rate than the mix of rates you are paying now. This calculator models the consolidation loan itself, returning one fixed payment, the total interest, and a payoff schedule, so you can compare it directly against your current path.

Consolidation is a math problem wrapped around a behavior problem. The math is straightforward — a lower rate and a sensible term should cost less. The behavior is where people stumble, and the sections below cover both so you can decide whether consolidating will genuinely help or simply move the debt around.

How to use this calculator

Add up every balance you intend to combine and enter the total as the amount. Enter the APR of the consolidation loan and the term in years. The tool shows the single monthly payment and the total interest you would pay. Compare that total against the combined interest you are on track to pay across your current debts — that comparison, not the monthly payment, tells you whether consolidating actually saves money.

How the math works

A consolidation loan is a fixed-rate installment loan, so it uses the standard amortization formula M = P · r / (1 − (1 + r)^−n), with P as the total consolidated balance, r the monthly rate (APR ÷ 12), and n the number of payments. The key concept to grasp is your weighted-average rate: the blended rate across your existing debts, weighted by each balance. Consolidation helps when the new loan's APR comes in below that weighted average — and when you do not stretch the term so far that the extra months of interest cancel out the rate savings.

Your options, each with trade-offs

There is no single "consolidation loan"; there are several routes, each suited to different situations:

• Personal loan — an unsecured fixed-rate loan with a defined payoff date. Predictable and collateral-free, but the rate depends heavily on your credit, and there may be an origination fee.
• Balance-transfer credit card — moves balances onto a card with a 0% introductory rate for a promotional window. Powerful if you can clear the balance before the promo ends, but there is usually a transfer fee, and the rate jumps sharply afterward.
• Home equity loan or line — uses your home as collateral, which typically buys a lower rate. The serious catch is that you are converting unsecured debt into debt secured by your house, putting the home at risk if you cannot pay.

A worked example

Imagine $20,000 spread across cards at a blended 22% APR, where the minimums barely dent the balance. Consolidating into a personal loan at a hypothetical 12% APR over five years would set the payment near $445 a month with total interest of roughly $6,670 — a clear improvement over leaving the balances revolving at 22%. But if you instead chose a seven-year term to get a lower $353 payment, total interest would climb to about $9,640. Same rate, lower payment, nearly $3,000 more in interest.

The two traps to avoid

The first trap is purely mathematical: chasing a smaller monthly payment by extending the term. A longer schedule feels like relief, but you may end up paying more in total interest than you would have on your original debts — defeating the entire purpose. Always check the total-interest figure, not just the payment.

The second trap is behavioral and arguably more dangerous. Consolidating pays off your credit cards, which leaves them sitting at a zero balance and fully available. Many people, having freed up that credit, gradually run the cards back up — and now carry both the consolidation loan and fresh card debt. Consolidation only works if it is paired with a genuine change in spending. Consider closing or freezing the paid-off cards if the temptation is real.

Tips and common mistakes

• Calculate your weighted-average rate first; consolidating above it makes no sense.
• Account for fees — origination or balance-transfer fees can erase a modest rate advantage.
• Keep the term as short as your budget allows to minimize total interest.
• Don't reload the cards. Treat the paid-off accounts as gone, not as a fresh line to spend.
• Be cautious with home equity. A lower rate is not worth risking your home if your income is unstable.