Skip to content
Allin
Sign up · Sign in

Loan calculator

Compute the monthly payment and total cost of a personal loan.

Related tools

All Loans & credit tools →
Boat loan calculatorEstimate the monthly payment on a boat loan from the purchase price, down payment, trade-in, sales tax and APR. It works out the amount financed, the monthly payment, the total interest over the term and the total cost, so you can size a marine loan before you sign.Car Loan CalculatorEstimate your monthly car payment, total interest and total cost from the price, down payment, rate and term.Motorcycle loan calculatorEstimate the monthly payment on a motorcycle loan. Enter the price, down payment, any trade-in, sales tax, APR and the term in months, and it returns the amount financed, the monthly payment and the total interest you'll pay.Loan payoff calculatorFind out how many months it takes to pay off a loan and the total interest.Loan-to-Deposit Ratio CalculatorA bank's loans divided by its customer deposits, with the funding gap and what a ratio above 100% really means for liquidity risk.Balloon Loan CalculatorWorks out the instalment and the balloon lump sum for a loan amortised over one term but repaid in full after a shorter one. The balloon is the true remaining principal after k payments, not the amount borrowed minus the payments made — the two differ by tens of thousands. Interest-only balloons are handled too, with the full schedule.Business Loan CalculatorPrices a business loan the way it actually costs: the origination fee is deducted from what lands in the account but interest is charged on the full face amount, so the real APR is above the quoted rate. The tool solves for that effective rate, and an optional extra monthly payment shows the months and the interest it removes.Car Loan Payoff CalculatorHow long to pay off your car loan, total interest and payoff date — plus the effect of an extra payment.

Need Monthly payment, Total cost, Total interest? The Loan calculator derives it from Loan amount, Annual rate (%), Duration (months) in one step. For instance, with Loan amount = $15,000.00, Annual rate (%) = 5 and Duration (months) = 48 it returns Monthly payment = $345.44, Total cost = $16,581.09 and Total interest = $1,581.09.

How to use it

  1. Enter your values: Loan amount, Annual rate (%), Duration (months).
  2. Read the result instantly: Monthly payment, Total cost, Total interest.

Frequently asked questions

What does the Loan calculator actually compute?

It takes Loan amount, Annual rate (%) and Duration (months) and derives Monthly payment, Total cost and Total interest from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

3 values: Loan amount ($), Annual rate (%) and Duration (months). Nothing else is required — no account, no file upload.

Can you show a worked example?

With Loan amount = $15,000.00, Annual rate (%) = 5 and Duration (months) = 48, the calculator returns Monthly payment = $345.44, Total cost = $16,581.09 and Total interest = $1,581.09. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

What happens if I enter larger values?

It moves a lot. Using Loan amount = $30,000.00, Annual rate (%) = 5.5 and Duration (months) = 96 instead, Monthly payment goes from $345.44 to $386.98 — which is why it is worth testing a few scenarios rather than trusting a single figure.

What does it give for smaller values?

Scaled down to Loan amount = $7,500.00, Annual rate (%) = 4.5 and Duration (months) = 24, Monthly payment comes out at $327.36. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Before signing: checking whether the instalment fits the budget, comparing two offers at different rates and terms, and seeing what a shorter term really costs each month.

What is the most common mistake?

Comparing monthly instalments instead of total interest. A longer term always looks cheaper each month and costs more overall — the two figures move in opposite directions.

How accurate is it, and what are the limits?

Estimate only — not financial advice.

What is the difference between the Loan calculator and the Boat loan calculator?

This one returns Total cost; the Boat loan calculator returns Amount financed and Total cost (down + payments). That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Car Loan Calculator is the closest one after this: Estimate your monthly car payment, total interest and total cost from the price, down payment, rate and term.

Further reading

All guides →
ExplainerHow Loan Payments Work: Amortization and Interest ExplainedSee how a fixed loan payment splits between principal and interest, how amortization shifts over time, and the formula behind the monthly number.ExplainerThe Total Cost of a Loan, ExplainedLearn why a loan costs far more than the amount borrowed, how total interest builds over the term, and why a longer term means paying more.ExplainerA Balloon Loan's Payment Is Small Because the Debt StaysA balloon loan is priced on a long amortisation and repaid on a short one, and the whole instrument lives in that gap. On $250,000 at 6.5%, amortised over 30 years and due at 7, the payment is $1,580.17 and the lump sum still owed is $226,040.61 — 90.4% of what you borrowed.How-toHow to Calculate a Car Loan Payment: The Amortization FormulaWork out your monthly car payment from the loan amount, interest rate and term — plus the total interest you'll pay — using the standard amortization formula.GuideBorrowing for the Business: What the Bank Looks At Before the RateThe coverage ratio is the gate, the guarantee is the second price and the rate is an output. On a 400,000 loan, cutting the rate by a full point moves the coverage ratio by 0.018 — while two extra years of term move it by 0.216. The whole negotiation is in the wrong place.ExplainerHow Credit Card Interest Works: APR and the Minimum TrapLearn how card APR becomes a daily periodic rate, why interest compounds daily, and how minimum payments can stretch a balance out for years.