Loan-to-Value Ratio: Calculate It and Understand Rates

This loan-to-value (LTV) calculator works out what percentage of a property’s value a loan represents. Enter the loan amount and property value to get the LTV ratio, plus the portion of the value not covered by the loan.

Formula

LTV ratio = loan amount ÷ property value × 100. The loan amount and property value must use the same currency and valuation basis. In the calculator, loan is the loan amount in dollars, and value is the property value in dollars. The first result, ltv, is a percentage. The second result, equity, is the difference between the entered value and loan amount, in dollars; it is not a complete measure of a borrower’s net worth or cash available.

Worked Example

Using the default inputs—loan amount $200,000 and property value $250,000:

1. Divide the loan by the property value: $200,000 ÷ $250,000 = 0.8.
2. Convert the decimal to a percentage: 0.8 × 100 = 80.00% LTV.
3. Subtract the loan from the property value: $250,000 − $200,000 = $50,000 not covered by the loan.

The 80.00% figure is the calculator’s headline result. It is a ratio, not an interest rate or a quote for the cost of borrowing.

Assumptions

• The calculation uses the loan amount and property value exactly as entered; it does not estimate either figure.
• It does not model interest, payment timing, or compounding because LTV is not a payment calculation.
• Fees, taxes, insurance, mortgage insurance, escrow, and other debts or assets are not included.
• The dollar symbol is a display unit. Use matching amounts in your currency if you are not entering dollars.

What LTV Means and Why It Matters

LTV describes the size of a loan relative to the value of the asset securing it, most often a home. Lenders may consider it among other details when assessing a mortgage or a home-equity loan, but the ratio alone does not determine approval, loan terms, or the borrower’s costs. Those depend on the lender’s assessment and the loan’s specific terms.

For example, an 80% LTV means the loan equals 80% of the property value used in the calculation. It does not mean the borrower has paid 80% of the home’s price in cash: the loan may include amounts beyond the original purchase price, and the value may have changed. Nor does 80% LTV mean an 80% interest rate. Interest rate and LTV are separate figures.

The second output here is simply property value minus loan amount. People often refer to this difference as equity in a basic example, but actual home equity can involve all debts secured against the property, not just one loan. If there are multiple liens or loans, include the relevant total debt when assessing combined borrowing against the home.

Which Property Value Should You Use?

The arithmetic is simple, but the chosen value can change the result substantially. Possible reference points include a purchase price, an estimated market value, or a value established for a lender’s review. They are not necessarily interchangeable. Use the figure specified for the calculation you are doing; a lender may use its own valuation process when evaluating an application.

For instance, a $200,000 loan against a $250,000 value gives 80% LTV. If the relevant valuation were instead $240,000, the same loan would produce about 83.33% LTV. The loan did not change—the denominator did. This is why a rough online estimate should not be treated as a lender’s final figure.

To calculate the ratio consistently:

• Use the loan balance or proposed loan amount relevant to your question.
• Use the property value measured on the same basis throughout the calculation.
• For more than one loan secured by the property, consider the combined balance when the question concerns total borrowing against that property.
• Keep units consistent. Do not divide a dollar loan by a value stated in another currency or in thousands of dollars without converting it first.

How to Read LTV Rates and Common Mistakes

LTV is commonly expressed as a percentage. A lower ratio means the loan is a smaller share of the entered property value; a higher ratio means it is a larger share. This is a description of the figures, not a promise about a particular rate, fee, or decision. There is no single LTV percentage that guarantees a specific interest rate or outcome across lenders and products.

One frequent mistake is to confuse the LTV ratio with the interest rate, APR, or a lender’s pricing. LTV is calculated from loan size and property value; APR describes borrowing costs under the applicable terms. Another mistake is to assume the calculator’s “value not covered” output automatically equals usable equity. Other property-secured debts, transaction costs, and a lender’s own criteria are outside this basic calculation.

The formula also has limits. If the loan amount is greater than the entered property value, the LTV will exceed 100%; that is mathematically valid and indicates the debt is larger than the value used in the calculation. If the valuation is uncertain, the ratio is uncertain too. The calculator does not forecast future property prices or account for changing loan balances.

Frequently Asked Questions

What is a loan-to-value ratio?
LTV is the loan amount divided by the property value, multiplied by 100. It expresses the loan as a percentage of that value.

How do I calculate LTV?
Divide the relevant loan amount by the relevant property value, then multiply by 100. For example, $200,000 ÷ $250,000 × 100 = 80%.

Is LTV the same as an interest rate?
No. LTV compares debt with property value. An interest rate is the price charged for borrowing, expressed as a rate over time. One does not directly tell you the other.

Can LTV be over 100%?
Yes. If the loan amount exceeds the property value entered, the result is above 100%. The calculation itself does not determine how a lender will evaluate that situation.

Do I include more than one mortgage or loan?
If you want the ratio for total borrowing secured by the property, use the combined relevant balances in the loan amount. A calculation for one specific loan may instead use that loan alone; follow the definition requested by the lender or document.

Is the calculator’s equity amount the cash I can borrow?
No. It is only property value minus the loan amount entered. It does not account for other debts, lender requirements, costs, or the amount a lender might make available.

This result is an estimate; the lender’s disclosure gives the exact figures.

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in loan | Loan amount | $ | 200000 | 0 | 100000000
in value | Property value | $ | 250000 | 0.01 | 100000000
out ltv | Loan-to-value ratio | % | loan / value * 100 | 2
out equity | Value not covered by loan | $ | value - loan | 2