Down Payment Calculator Online
Work out your down payment amount, percentage, loan amount, and how long it takes to save for it, right in your browser. Estimates only, not financial advice.
The Down Payment Calculator runs entirely in your browser. Your home price, down payment, and savings figures never leave your device and are not uploaded to ArrayKit. Results are estimates only, not financial advice.
Open the Mortgage Calculator
About Down Payment Calculator
The Down Payment Calculator converts between a down payment percentage and a dollar amount, then shows you the resulting loan amount for a home purchase. Enter the home price and either the percent you plan to put down or a flat dollar figure, and it fills in the other side automatically. Add an optional monthly savings amount and it estimates how many months (and years) it will take to reach that down payment from zero. It is useful when comparing a 5%, 10%, or 20% down payment on the same home, checking whether a smaller down payment triggers private mortgage insurance, or setting a savings target before house hunting. These are estimates only, not financial advice — everything runs locally in your browser and your figures are never uploaded.
Features
- Switch between entering the down payment as a percentage or a dollar amount
- Automatically calculates the other value and the resulting loan amount
- Optional monthly savings field estimates months and years to reach your goal
- Warns when a percentage exceeds 100% or a dollar amount exceeds the home price
- Copy a plain-text summary of home price, down payment, loan amount, and time to save
- Handles typed thousands separators and currency symbols in any field
- Clear error messages for missing or invalid home price and down payment values
- Runs entirely on your device — no purchase or savings figures are sent anywhere
How to use the Down Payment Calculator
- Enter the home price
- Choose whether to enter the down payment as a percent or a dollar amount
- Type the down payment value — the loan amount updates instantly
- Optionally add a monthly savings amount to see how long it takes to save it
- Copy the results summary for your notes or a lender
Example
Input
$400,000 home, 20% down
Output
Down payment: $80,000
Loan amount: $320,000
Common errors & troubleshooting
- Loan amount shows the full home price with no down payment applied. — Make sure the down payment field for the selected mode (percent or dollar) actually has a value — an empty field is treated as no down payment yet.
- Down payment percentage shows a warning above 100%. — You likely typed the dollar amount into the percent field by mistake, or the home price is smaller than intended. Switch modes or double-check the home price.
- Months to save looks too high or too low. — The monthly savings field only affects the estimate when it is greater than 0 — confirm you entered a realistic monthly amount, not a one-time deposit.
- Loan amount is negative or shows as $0 unexpectedly. — This happens when the dollar down payment you entered is larger than the home price — the Down Payment Calculator caps the loan amount at $0 and shows a warning.
Frequently asked questions
- What does the Down Payment Calculator actually compute?
- Enter a home price and either a down payment percentage or dollar amount, and the Down Payment Calculator derives the other value plus the resulting loan amount. Add a monthly savings figure to also see an estimated time to save.
- How does the Down Payment Calculator estimate months to save?
- It divides the down payment amount by your monthly savings figure and rounds up, so a $80,000 down payment at $2,000 per month shows 40 months. This assumes a fixed monthly amount and does not account for interest earned on savings.
- Does a bigger down payment always mean a smaller loan on this calculator?
- Yes — loan amount is simply home price minus down payment. Increasing either the percentage or dollar figure lowers the loan amount shown by the Down Payment Calculator by the same amount.
- Can I switch between percent and dollar mode without losing my numbers?
- Switching modes changes which field you edit next, but the last computed loan amount and down payment stay visible until you type a new value in the newly selected field.
- Is the Down Payment Calculator result the same as what my lender will quote?
- No. This is an estimate only, not financial advice. Lenders factor in credit score, loan program minimums, PMI, and closing costs, so always confirm final numbers with a mortgage professional.
- Are my home price and savings numbers stored anywhere?
- No. The Down Payment Calculator runs entirely in your browser. The figures you type never leave your device and are not uploaded to ArrayKit.
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