Loan-to-Value Ratio Calculator and Formula

This loan-to-value (LTV) calculator divides a loan amount by the value of the property or other asset securing it, then expresses the result as a percentage. Enter the loan amount and the asset’s current value to see the LTV ratio and the amount of value not covered by the loan.

Formula

The loan-to-value ratio is the loan amount divided by the value of the asset securing the loan, multiplied by 100 to convert the fraction to a percentage:

LTV (%) = (L ÷ V) × 100

• L is the loan amount, in dollars.
• V is the value used for the asset, in dollars.

The second calculator result, value minus loan amount, shows the simple difference between those two inputs. It is not necessarily the borrower’s equity after accounting for other debts, selling costs, or fees.

Worked Example

Using the calculator’s default values—loan amount $200,000 and property or asset value $250,000:

1. Divide the loan by the value: $200,000 ÷ $250,000 = 0.8.
2. Multiply by 100: 0.8 × 100 = 80.00% LTV.
3. Subtract the loan from the value: $250,000 − $200,000 = $50,000.

The calculator’s headline result is therefore 80.00%. This is a ratio, not the interest rate or monthly payment on a loan.

Assumptions

• The loan amount and asset value are entered in the same currency and on a comparable basis.
• The loan amount is the amount being measured; the calculator does not add other debts secured by the asset.
• The asset value is supplied by the user. The calculator does not estimate or verify it.
• No interest, payment schedule, fees, taxes, insurance, or transaction costs are modelled.

How to Determine LTV

First identify which loan and asset you are measuring. For a mortgage, people often compare the mortgage balance or proposed loan amount with the value of the home. For a vehicle loan or another secured loan, use the relevant asset and the loan balance or amount being assessed. The precise inputs can depend on the question being asked, so make sure the numerator and denominator refer to the same transaction and time.

Next, determine the value basis. A purchase price, a recent valuation, and an estimate of current market value are not automatically interchangeable. A lender may use its own valuation process or a value specified for the transaction. This calculator cannot determine which figure applies: enter the value required for your intended calculation, and confirm the lender’s figure directly if you are comparing your result with a loan document or application.

Finally, divide the loan by the asset value and multiply by 100. If you already know the percentage and want to calculate the corresponding loan amount, rearrange the formula: loan amount = LTV percentage ÷ 100 × asset value. For example, 80% of a $250,000 value is $200,000. That arithmetic does not establish that a particular loan amount is available or will be approved.

How to Read the Result

An LTV of 80% means the loan amount equals 80 cents for each dollar of the asset value used in the calculation. A result below 100% means the loan amount is less than that value; 100% means they are equal; and above 100% means the loan amount exceeds the entered value. These are mathematical comparisons, not judgments about a loan or a person’s financial position.

The value-minus-loan result helps illustrate the difference between the two inputs. In the example, that difference is $50,000. It should not be called guaranteed equity: the asset may have other liens or secured debts, and costs or changes in value can affect what someone would receive if the asset were sold.

For an existing loan, a current balance may be more relevant than the original amount borrowed. For a new loan, the proposed amount may be the intended numerator. If there are multiple loans secured by the same asset, a calculation using just one loan will not represent all secured borrowing. The calculator uses only the two amounts entered and does not infer additional balances.

Common Errors and Limits

• Mixing value dates or definitions: Comparing a current loan balance with an old asset valuation can make the result misleading. Use a value appropriate to the question and note when it was determined.
• Using different currencies or units: Convert both amounts to the same currency before calculating. The formula also requires dollar amounts rather than mixing dollars with thousands of dollars.
• Confusing LTV with a down payment: In a simple purchase example with no other financing, a 20% difference between price and loan corresponds to an 80% LTV. But the calculator’s value-minus-loan result is not always a down payment or complete equity measure.
• Rounding too early: Keep the full input values through the division, then round the displayed percentage. A small difference in rounded values can matter when checking a document or threshold.
• Leaving out other secured debt: The basic formula does not include additional loans against the same asset. If the intended measure includes them, add the relevant balances to the loan amount before dividing.

LTV is one measure among many. It does not calculate loan payments, interest costs, affordability, approval likelihood, or the lender’s valuation. Any thresholds, fees, or other consequences attached to a particular LTV are specific to the transaction and lender; the calculator does not model them. Use the lender’s stated inputs when you need to reproduce its calculation.

Frequently Asked Questions

What is the formula for loan-to-value ratio?
Divide the loan amount by the asset value and multiply by 100: LTV (%) = (loan ÷ value) × 100.

How do I calculate LTV for a mortgage?
Divide the mortgage amount or balance you are measuring by the relevant home value, then multiply by 100. Confirm which balance and value basis apply to the calculation you need.

Can an LTV ratio be over 100%?
Yes. The mathematical result exceeds 100% whenever the entered loan amount is greater than the entered asset value. The calculation alone does not explain why that difference exists or what terms may apply.

Is LTV the same as equity?
No. LTV is a percentage comparing a loan amount with an asset value. The difference between value and loan is a simple subtraction; full equity may also depend on other secured debts and costs.

Which property value should I use?
Use the value specified for the calculation you are doing. A sale price, estimate, and lender-determined value may differ, so check the relevant loan documents or ask the lender which figure it uses.

The result is an estimate, and the lender’s disclosure gives the exact figures.

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in loan | Loan amount | $ | 200000 | 0.01 | 100000000
in value | Property or asset value | $ | 250000 | 0.01 | 1000000000
out ltv | Loan-to-value ratio | % | loan / value * 100 | 2
out gap | Value minus loan amount | $ | value - loan | 2