Loan to Value Calculator
Your mortgage as a percentage of property value.
Calculate your loan-to-value (LTV) ratio from mortgage balance and property value — plus the equity cushion you have above the loan.
What this tool does
Loan-to-value (LTV) is your mortgage balance divided by your property value — the percentage that represents how much you've borrowed against what the property is worth. This calculator takes your current mortgage balance and property value to show your LTV ratio as a percentage, plus your equity position (the difference between property value and mortgage owed). The mortgage balance is the primary driver of the result; as it decreases through repayment, your LTV falls. A typical scenario: comparing your LTV at different points in your mortgage term to see how your equity stake changes. The calculation uses current figures and doesn't account for property value fluctuations, estimated closing costs, or changes in mortgage terms over time. The result illustrates your current loan-to-value standing for reference purposes.
Enter Values
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Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
LTV is the single most-quoted ratio in mortgage lending. Below 60% unlocks the cheapest rates. 75-80% is the common middle tier. Above 90% is expensive and often requires insurance. A 240,000 balance on a 300,000 property is 80% LTV — typical first-time buyer territory.
Quick example
With mortgage balance of 240,000 and property value of 300,000, the result is 80.00%. Change any figure and watch the output shift — it's often more useful to see the pattern than to memorise the formula.
Which inputs matter most
You enter Mortgage Balance and Property Value. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most.
What's happening under the hood
Standard LTV definition: outstanding loan divided by current property value. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.
Why this matters before you sign
A mortgage is usually the biggest single financial commitment a person makes. The difference between a well-chosen product and a hasty one can run into tens of thousands over the life of the loan. Running the numbers here before committing is the cheapest form of due diligence available.
What this doesn't capture
The figure excludes arrangement fees, valuation costs, legal fees, insurance, and any early-repayment charges — those can add several thousand to the headline cost. Rate changes at renewal for fixed-term deals will shift the picture further. Use this for the core interest/principal math and add the other costs on top.
Where to go next
This calculation rarely sits alone in a planning exercise. If you're running these numbers, you'll probably also want the mortgage calculator, the home equity calculator, and the combined ltv calculator — each one answers a different question in the same territory. Treating them as a set rather than in isolation usually produces a more honest picture.
A £240,000 mortgage on a £300,000 property results in a loan to value ratio of 80.00%.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
This calculator computes loan-to-value ratio by dividing the outstanding mortgage balance by the current property value. The result is expressed as a percentage, showing what portion of the property's value is financed by debt. The model treats both the mortgage balance and property value as static figures at a single point in time. It does not account for ongoing mortgage repayments, property appreciation or depreciation, fees, interest accrual, or changes in market conditions. The calculation assumes the property value entered reflects the current market valuation or most recent appraisal. LTV is commonly used by lenders to assess lending risk and borrower equity position.
References
Frequently Asked Questions
Why does LTV matter?
What are the lending tiers?
Does LTV change automatically?
What is combined LTV?
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