Tools
Loan, mortgage, retirement, and rental calculators, plus a QR/barcode generator.
🧮 Loan Calculator
🏠 Mortgage Calculator
🏖️ Retirement Calculator
🔎 Load a Real Property (RentCast)
Pull real numbers into the calculator below using RentCast's free API (50 lookups/month). Your API key is saved only in this browser — it's never stored on the website itself.
Get a free key at rentcast.io/api, then paste it here once.
Or look up one address
🏘️ Rental Property Calculator
Fill in what you know — everything else has a sensible default. Hover the field names if a term is unfamiliar.
The property
What you're paying for the property.
One-time fees to close the deal — inspection, title, lender fees, etc.
Your loan
The share of the price you pay upfront in cash. The rest gets financed.
The annual interest rate on your loan.
How many years you'll take to pay it off — 30 is typical.
The portion of the purchase price this second loan covers.
Its annual interest rate.
Rent you'll collect
What you expect to charge per month.
A buffer for months it might sit empty between tenants.
Yearly costs of owning it
Only what you pay — leave at 0 if the tenant covers utilities.
Routine upkeep — lawn care, cleaning, filters, etc.
If you hire a manager, the % of rent they keep. Leave at 0 if you self-manage.
Cost to advertise the rental when it's vacant.
Anything not covered above.
▦ QR Code Generator