LTV Calculator: Loan-to-Value Ratio Explained

An LTV calculator works out the loan-to-value ratio: the loan amount as a percentage of the property’s value. Enter the loan and property value to see the LTV percentage, a useful way to understand how much of the property is financed by borrowing.

Formula

LTV (%) = loan amount ÷ property value × 100. Here, loan is the amount borrowed, in the same currency units used for value; value is the property value in those same units. The result, ltv, is a percentage. The calculator also estimates the difference between the entered value and loan: equity amount = property value − loan amount. Currency does not affect the percentage, provided both amounts use the same currency.

Worked Example

Using the calculator’s defaults, the loan is 250,000 currency units and the property value is 400,000 currency units.

• LTV = 250,000 ÷ 400,000 × 100
• LTV = 0.625 × 100 = 62.5%
• Equity amount = 400,000 − 250,000 = 150,000 currency units

The calculator displays the LTV to two decimal places, so the headline result is 62.50%. The equity result is 150,000.00 currency units.

What Loan-to-Value Means

Loan-to-value, commonly shortened to LTV, compares a loan secured against a property with that property’s value. It expresses the borrowed amount as a share of the asset’s value. An LTV of 62.5% means the loan equals 62.5% of the entered property value; it does not mean the borrower has paid exactly 37.5% of the original purchase price unless the value and loan figures support that conclusion.

Lenders may use LTV as one factor when assessing a mortgage or other property-secured borrowing. The relevant value, loan balance, calculation method, and consequences can vary by lender, product, and purpose. This calculator is a basic arithmetic tool, not a lender’s decision or a complete affordability assessment.

How to Choose the Numbers

For a simple estimate, use the loan amount being considered and a defensible estimate of the property’s current value. For an existing mortgage, decide whether you want to compare the property value with the current outstanding balance or with a proposed new borrowing amount. Those are different calculations and answer different questions.

• Loan amount: Use the principal amount relevant to the question. If there are several loans secured on the same property, a lender’s combined-LTV calculation may include more than one balance.
• Property value: Use the value relevant to the calculation, such as a purchase price or a current valuation. Do not assume that an asking price, tax assessment, or online estimate is the figure a lender will accept.
• Matching units: Enter both amounts in the same currency and scale. For example, enter 250,000 and 400,000, not 250,000 and 400 when the latter means 400,000.

The calculator does not determine which valuation a lender will use. If the result is for an application, refinancing, or another formal purpose, confirm the required figures and method with the relevant lender or professional.

Reading the Result and Common Mistakes

A lower LTV means the loan is a smaller fraction of the entered property value; a higher LTV means it is a larger fraction. The separate equity figure is simply value minus loan. It is not necessarily cash available to withdraw: selling costs, other secured debts, restrictions, and lender requirements are not included.

• Reversing the division: Divide the loan by the value, then multiply by 100. Dividing value by loan gives a different ratio.
• Mixing units or scales: A loan of 250,000 and value of 400,000 produce 62.5%. Entering the value as 400 by mistake produces a misleading result.
• Confusing percentage and decimal: The ratio 0.625 becomes 62.5% after multiplying by 100.
• Rounding too soon: Keep the original amounts through the calculation and round only the displayed result. Small differences in input values can matter near a threshold used by a particular lender.
• Assuming equity equals a deposit: The calculator’s equity figure is a simple difference. A deposit usually refers to money contributed toward a purchase, while equity refers to the gap between a property’s value and secured borrowing at a given time.

Limits and Related LTV Measures

This basic calculator assumes one loan and one property value. It does not add multiple mortgages, account for fees or other debts, forecast changes in value, or decide whether a valuation is appropriate. If several loans are secured against a property, a combined LTV may be calculated by adding the relevant balances before dividing by the property value; whether that is the applicable method depends on the lender’s definition.

LTV can also change without a new loan. If the loan balance falls while value stays the same, the ratio falls. If the property value falls while the loan stays the same, the ratio rises. Conversely, an increase in value can lower the ratio mathematically, but the value must be accepted for the intended purpose before relying on that result.

Frequently Asked Questions

How do I calculate LTV?
Divide the loan amount by the property value and multiply by 100. For a 250,000 loan on a property valued at 400,000, the calculation is 250,000 ÷ 400,000 × 100 = 62.5%.

What does 80% LTV mean?
It means the loan amount is 80% of the property value used in the calculation. The remaining 20% is the simple value-minus-loan difference, assuming there are no other secured loans to include.

Is a lower LTV better?
A lower LTV means less borrowing relative to the entered property value. Lenders may consider it alongside other factors, but this calculation alone cannot establish whether a loan is suitable or what terms may apply.

Does LTV use the purchase price or current value?
It depends on the purpose and the lender’s rules. A purchase calculation may use a purchase-related valuation, while an existing loan calculation may use a current valuation. Confirm which value is required rather than assuming one applies in every case.

Can LTV be over 100%?
Yes. If the loan is greater than the property value entered, the formula produces an LTV above 100%. Check that the inputs and units are correct; if they are, the result simply means the loan exceeds that stated value.

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in loan | Loan amount | currency units | 250000 | 0
in value | Property value | currency units | 400000 | 0
out ltv | Loan-to-value ratio | % | loan / value * 100 | 2
out equity | Equity amount | currency units | value - loan | 2