Lenders look at one number early in almost every mortgage: the loan to value ratio. LTV compares the size of your loan with the value of the home. It shapes your rate and whether a conventional loan needs private mortgage insurance (PMI).
This Loan to Value Calculator links the home value, loan amount, and down payment. Change one, and the tool fills in the other. Buyers and refinancing owners can use it to check LTV, PMI, and equity in seconds.
Table of Contents
- What the Calculator Does
- How to Use It, Step by Step
- The LTV Formula
- Worked Example
- How to Read the Results
- Why LTV Matters for Your Mortgage
- Limitations and Assumptions
- FAQs About the Loan to Value Calculator
What the Calculator Does
Results update as you type, so there is no calculate button to press. Besides the LTV ratio, it shows four result cards and two buttons.
- Loan-To-Value (LTV) Ratio: the loan as a percent of the appraised value.
- Down Payment Ratio: the down payment as a percent of value.
- PMI (Conventional Loan Guideline): PMI Likely (Conventional, over 80%) or PMI Unlikely (Conventional, 80% or less).
- Home Equity Cushion: home value minus the loan, in dollars.
- Max 80% LTV Loan Limit: 80% of the home value.
- Copy LTV Ratio Analysis and Reset buttons.
How to Use It, Step by Step
- Enter the home's value in Appraised Property Value ($). The loan amount resets to value minus your current down payment.
- Enter your cash in Down Payment Amount ($). The loan amount updates to match.
- Or type a figure in Total Loan / Mortgage Amount ($). The down payment updates instead.
- Read the LTV ratio and the four result cards.
- Press Copy LTV Ratio Analysis to copy the three inputs and all five results as text.
- Press Reset to return to $450,000, $360,000, and $90,000.
The LTV Formula
LTV is a simple division. The down payment ratio is the other part of the same home value.
Loan Amount÷Appraised Value× 100=LTV %
- Loan amount = value - down payment, or down payment = value - loan. Neither goes below 0.
- Down payment ratio = down payment ÷ value × 100.
- Home equity cushion = value - loan.
- Max 80% LTV loan = value × 0.80.
- The PMI flag uses the LTV shown on screen. It turns on at 80.1% LTV or higher.
Worked Example
Lena is buying a home that appraised at $385,000. She has $57,750 saved for the down payment. She enters the value first, then her down payment, and the loan fills in.
| Result | With $57,750 Down | With $77,000 Down |
|---|
| Loan Amount (filled in) | $327,250 | $308,000 |
| LTV Ratio | 85.0% LTV | 80.0% LTV |
| Down Payment Ratio | 15.0% Down | 20.0% Down |
| PMI (Conventional Loan Guideline) | PMI Likely (Conventional, over 80%) | PMI Unlikely (Conventional, 80% or less) |
| Home Equity Cushion | $57,750 | $77,000 |
| Max 80% LTV Loan Limit | $308,000 | $308,000 |
The max loan card tells Lena she needs $19,250 more down to reach 80%. She could also look at a lower-priced home. If a lender offers her $340,000 instead, typing that loan sets the down payment to $45,000 and LTV to 88.3%.
How to Read the Results
LTV Ratio is the share of the home financed by the loan. Lower is safer for the lender and often better for your rate.
Down Payment Ratio is your share. LTV and down payment percent add up to 100% when the fields are in sync.
PMI (Conventional Loan Guideline) is a simple flag at the 80% line. It is a planning signal, and your lender sets the final terms.
Home Equity Cushion is the value you own on day one. It matches your down payment unless the loan is larger than the value.
Max 80% LTV Loan Limit is the largest loan that stays at 80% LTV. It is a useful target, not a loan offer.
Why LTV Matters for Your Mortgage
A lower LTV gives the lender more protection if home prices fall. That is why rates and fees often improve as LTV drops. On a purchase, many lenders use the lower of the price or the appraised value.
Plan your cash with the down payment calculator, and remember fees too. The closing cost calculator estimates that extra cash at signing. The home affordability calculator tests a price against common income rules.
LTV also matters after you buy. Rising values or paying down principal lower it over time. The property appreciation calculator projects example value growth.
The mortgage refinance calculator compares a new loan with your current one. Find more tools in the finance and business hub.
Limitations and Assumptions
- The tool assumes loan plus down payment equals value. It does not handle second mortgages or seller credits.
- The PMI flag follows the conventional 80% guideline only. FHA loans carry their own mortgage insurance, and VA loans use a funding fee instead.
- If the loan is larger than the value, the down payment field shows 0 and LTV goes above 100%. The equity card shows the gap, such as -$30,000 for a $330,000 loan on a $300,000 home.
- A blank or negative field shows a message and N/A. Other fields stay unchanged, and the value must be at least $10,000.
- A down payment larger than the home value is rejected with a message.
- Dollar results round to whole dollars, and LTV rounds to one decimal. So 80.04% shows 80.0% with PMI Unlikely, while 80.05% shows 80.1% with PMI Likely.
- While any field is invalid, the copy button shows Fix inputs first and copies nothing.
FAQs About the Loan to Value Calculator
What is a loan to value ratio?
It is your loan amount divided by the home's appraised value, shown as a percent. A $300,000 loan on a $400,000 home is 75% LTV.
Why is 80% LTV important?
On many conventional loans, PMI is required when LTV is above 80%. Putting 20% down usually avoids it. Lender rules vary, so confirm with your loan officer.
How can I lower my LTV?
Make a larger down payment, choose a lower-priced home, or pay down principal after closing. A higher appraisal also lowers LTV on a refinance.
Does the tool use the purchase price or appraised value?
It uses whatever you enter in the appraised value field. If the price and appraisal differ, try both to see the range.
Can I use this for a refinance?
Yes. Enter the current appraised value and the new loan amount. The down payment field will show your equity in the home.
Does PMI go away later?
On most conventional loans, you can ask to cancel PMI once the balance reaches 80% of the original value. It usually ends on its own at 78% if your payments are current.
This calculator gives planning estimates only and is not financial advice. Reviewed for general accuracy by Prof. Dr. Khalil Mudassar, PhD.