How it works
Open any calculator below, click “Embed this calculator on your website” under the tool, and copy the snippet — a plain <iframe> that works on WordPress, Substack (web), Ghost, Squarespace, Wix, and any HTML page. It looks like this:
<iframe src="https://moneycrunchlab.com/mortgage-payoff-calculator/?embed=1"
width="100%" height="600" style="border:1px solid #e3e8ef;border-radius:10px"
title="Mortgage Payoff Calculator" loading="lazy"></iframe>The fine print (it’s short)
- Free to embed — no account, API key, or paid tier is required under the current terms.
- Keep the attribution link — the small “Calculator by MoneyCrunchLab” credit inside the widget must remain visible. That’s the whole price.
- Private by design — calculations run in your reader’s browser; the widget does not submit the numbers they type to a backend.
- No analytics or ads inside embeds — the widget stays clean on your page. Essential hosting requests still occur as described in our privacy policy.
Pick a calculator
Mortgages & Home Buying
- How Much House Can I Afford? — Your real budget by the 28/36 rule — taxes and insurance included, not just the mortgage.
- Rent vs. Buy — The honest comparison over your real horizon — including selling costs and your down payment invested.
- 15 vs. 30 Year Mortgage — Both terms side by side — including the honest invest-the-difference comparison.
- Mortgage Points Break-Even — Whether buying down your rate pays off — the exact month the points turn profitable.
- Mortgage Payoff — Extra payments, a lump sum, or both — your new payoff date and the interest never charged.
- Biweekly Mortgage Payments — How many years — and how much interest — paying every two weeks removes from your loan.
- Mortgage Recast — Your new payment after a lump-sum principal payment — and whether the recast fee is worth it.
- Refinance Break-Even — When the closing costs pay for themselves — and whether the term reset quietly costs more.
- HELOC Payoff — When your home equity line is actually paid off — and what an extra monthly payment changes.
- Down Payment — The real cash target — down payment plus closing costs — and the month you reach it.
- Amortization Schedule — Any fixed loan unpacked year by year: interest, principal, and the balance that remains.
Loans & Debt
- Debt Snowball vs. Avalanche — Both payoff strategies side by side with your real debts: payoff dates, total interest, verdict.
- Credit Card Minimum Payment — How long the minimum really takes, what it costs, and what a fixed payment saves.
- Student Loan Payoff — Your real payoff date, and what an extra monthly amount does to it — federal or private.
- Auto Loan — Your real car payment with trade-in and sales tax — plus the total cost most buyers skip.
- Personal Loan — Monthly payment, total interest, and what the origination fee does to the money you receive.
Saving & Investing
- Compound Interest — Modeled balance, contributions, and growth under a constant return assumption.
- Savings Goal — The estimated monthly amount to reach a goal by a deadline under your rate assumption.
- Emergency Fund — A target scenario from essential expenses, today’s runway, and the modeled timeline.
- CD Ladder — Five CDs, staggered maturities: payouts per rung, blended APY, and when cash unlocks.
- Inflation — What your money will buy later, and how much future money it takes to match today.
Retirement & Financial Independence
- 401(k) Employer Match — A single-tier match estimate, any amount below its cap, and projected retirement value.
- Roth vs. Traditional — Simplified after-tax values using the same pre-tax budget and modeled tax rates.
- FIRE Number — The portfolio that makes work optional, your progress, and your years to get there.
Work & Income
- Salary to Hourly — Salary ⇄ hourly in both directions, plus a gross-pay equivalent per hour worked.
Custom default values — self-service
Every calculator reads its starting values from the URL fragment: each input field’s id is a parameter after the #. Keep ?embed=1 before it. Example — a rent vs. buy embed preset for a Manhattan audience:
https://moneycrunchlab.com/rent-vs-buy-calculator/?embed=1#rent=4800&price=800000Readers can use the calculator’s Copy link button to share their exact calculation. The shared link contains the values after #; when opened, the page removes them from the address bar before third-party scripts load and keeps them in local browser history. Older query-string links still load and are automatically migrated.
Want a variant?
Need a specific height, a calculator we haven’t built yet, or help picking parameters? Email hello@moneycrunchlab.com — publisher requests get priority.