The 9 calculators every Realtor uses on showings and listing presentations.
Affordability math, square-footage checks, and price-per-square-foot benchmarks — the conversations that move buyers from 'looking' to 'writing an offer.'
- • Run a payment scenario live during the showing instead of telling the buyer 'your lender will tell you' — agents who quote real numbers get more second tours.
- • Verify listing square footage against tax records before you take the listing — discrepancies that surface at appraisal kill deals you should have priced differently.
- • Embed the mortgage calculator on your IDX site so 'just browsing' visitors qualify themselves before requesting a tour.
Mortgage Calculator
PITI plus PMI for any list price — the question every buyer asks within the first 30 seconds of an open house. Have the answer in your pocket on every showing.
8 more calculators every Realtor should bookmark.
Click any calculator to use the full version — formulas, examples, FAQs, and the option to embed it on your own site.
Square Footage Calculator
Verify listing sq ft against tax records or measure additions before pricing — the difference between a smooth appraisal and a deal renegotiation.
Open calculatorLoan Calculator
HELOCs, second mortgages, and bridge loans for buyers using non-standard financing on a move-up or pre-listing renovation.
Open calculatorAuto Loan Calculator
Conversation tool when a buyer with marginal DTI is also shopping for a new car the week before pre-approval — show them the math.
Open calculatorSales Tax Calculator
Quick state and local sales tax math for closing-cost line items, contractor invoices, and staging-purchase reimbursables.
Open calculatorDays Between Dates
Listing agreement expirations, due-diligence period math, and 'days on market' calculations for CMA narratives.
Open calculatorCompound Interest Calculator
Frame the rent-vs-buy math for first-time buyers — what their down payment would do in the market versus the equity build of ownership.
Open calculatorSavings Calculator
Reverse-engineer the timeline for a buyer who's $20k short of 20% down, given their current monthly savings rate.
Open calculatorNet Worth Calculator
Useful for upper-tier buyer prep where the lender wants a full asset picture before issuing a strong pre-approval letter.
Open calculatorOpen house at 3pm Saturday. Here's how the math earns you the buyer.
Sam Okafor, a realtor, has eight signed in by 3:45pm. Two are 'just looking.' One couple is engaged enough to ask the actual question: 'What would the payment be on this?' List is $475k. Down payment they're working with: $50k. Credit they describe as 'pretty good.' That's enough to model.
On his phone in the kitchen, Sam pulls up the mortgage calculator: $475k, $50k down, 30-year fixed at the rate his preferred lender quoted Tuesday morning, plus the county tax rate from the listing sheet and a homeowner's insurance estimate. PITI: $3,140. He shows them the screen. He doesn't say 'talk to your lender' — he says 'this is roughly your number; here's what it changes if rates drop a quarter point.' He runs the second scenario in 20 seconds. Both numbers feel real to them in a way 'around three grand' would not have.
They like the house. The wife asks how long it's been on the market. Sam pulls up the days between calculator — 18 days, in a market where the median is 12, which means the price has room to move. He doesn't say that out loud yet. He notes it. The husband asks about the listed 2,450 square feet versus the tax records that say 2,380. Sam pulls up the square footage calculator, paces off the bonus room (which the listing agent likely included and which the appraiser may not), and confirms about 70 sq ft of difference. He notes that too — useful for the offer narrative.
By the time they leave the open house Sam has their lender contact info, a follow-up tour scheduled for Tuesday, and a pre-built CMA conversation ready: he'll send the listing comp pulled at three different sq-ft assumptions and the corresponding price-per-foot ranges. The math doesn't replace the relationship — it makes the relationship feel competent. Buyers move toward agents who know the numbers, not the agents who promise to find out.
Put the Realtor toolkit on your site.
Free. No signup. No tracking pixel for your visitors. Works on WordPress, Squarespace, Webflow, or raw HTML. Customize colors and fonts to match your brand. Hosted and updated by us.
<iframe src="https://metricscalculator.com/embed/finance/mortgage-calculator" width="100%" height="500" style="border:none;border-radius:8px" title="Mortgage Calculator" loading="lazy"> </iframe>
Standard iframe — no scripts, no dependencies. Drop it in any HTML block.
Before you bookmark.
Frequently Asked Questions
Are these calculators accurate enough to use on a showing or do I need to refer everything to the lender?
For directional payment quotes, yes — they use the same standard PITI math your lender's pricing engine uses. For the actual locked rate, points, MI factor, or program-specific overlays, the lender remains the source of truth. Frame your number as 'roughly' or 'ballpark' and let the loan officer firm it up. That's how every top-producing agent uses them.
Can I embed the mortgage calculator on my IDX site or agent website?
Yes. The embed builder lets you customize colors, fonts, and border style to match your site, then gives you a single iframe to paste into any IDX-compatible site (kvCORE, Sierra Interactive, Real Geeks, Boomtown all support custom HTML modules). Free, no signup, no Realtor-specific disclosure required by us.
Will my brokerage compliance team approve an embedded calculator?
Most do — the iframe has no advertising, sets no cookies on visitors, and runs no scripts on your parent site. The only required element is a small 'Powered by MetricsCalculator' attribution under the widget. If your brokerage is part of a national franchise (KW, RE/MAX, C21), get sign-off from the franchise compliance team first; independents typically clear it in a week.
Should I use these for listing presentations too, or just for buyers?
Both. For listings, the square footage calculator is your quiet weapon — verify tax-record sq ft against actual measurements before you set the list price, because appraisal-time discrepancies kill deals. The compound interest and savings calculators also play in seller consultations: 'Here's what the proceeds invested for 18 months would do toward your next purchase.'
Do you have an MLS or CMA tool?
No — those require licensed MLS data feeds we don't have. Our calculators are math tools (payments, square footage, dates) that work alongside your CMA software, not in place of it. Use them on the conversational side of buyer and seller meetings.
Which calculator gets the most use on agent websites?
Mortgage, by a wide margin. Put it on every neighborhood landing page and every individual listing detail page. The visitors who run a payment are 5–10× more likely to fill out a 'request more info' form than visitors who just scroll. Second-best is the rent-vs-buy framing using the compound interest calculator on a first-time-buyer content page.