What it does
- Monthly principal and interest with the standard PMT formula
- Full PITI breakdown including property tax, insurance, and PMI
- Borrowers self-qualify before the first phone call
- Embed on your website or send as a link by email
- Submissions land in your dashboard with the math already done
How you would build it
Your prompt to Claude
"Build a mortgage calculator form. Inputs: home price, down payment percent, rate, term in years, property tax annual, homeowners insurance annual. Show monthly P&I and full PITI to the customer. Keep loan officer notes private."
A $450,000 home with 20% down at 6.75% over 30 years gives $2,335 monthly P&I and $2,818 full PITI.
Formulas supported
PMTamortizationPMI breakpoint at 80% LTVPITI total
How it works
- Connect CalcForms once. Paste forms.badabingapp.cc into your Claude connectors. One-time, 60 seconds.
- Build the form by chatting. Paste your spreadsheet or describe the calculator.
- Share the URL. Embed it, send it, post it. Submissions land in your dashboard with the math pre-calculated.
FAQ
Can the calculator handle PMI?
Yes. PMI kicks in below 20% down and falls off at 80% LTV. Define the breakpoint and the monthly factor, then ask Claude to add a PMI conditional. The form runs the math automatically.
Can I update rates without rebuilding?
Yes. Either hard-code rates by loan type, or maintain a rate table in your spreadsheet and ask Claude to update the form when rates change. The URL stays the same.
Does the borrower see the breakdown?
You choose. Pick which calculated fields are public. Show monthly payment and PITI to the borrower; keep internal lock fees and margins private. One toggle per field.
Can I capture contact info?
Yes. Add name, email, phone as form inputs. Every submission lands in your dashboard with the calculator results attached.
Build yours in the next 10 minutes.
5 submissions free. No credit card.
Start free →