Calculator Center
Calculators that show their work.
Each calculator uses the interest rate and assumptions you enter. None presents a rate as current, and none creates a crawlable result URL from your inputs.
- Mortgage Payment Calculator
Estimate principal, interest, taxes, insurance, HOA, and PMI for a conventional loan using assumptions you control.
- Debt-to-Income (DTI) Calculator
Calculate front-end and back-end DTI ratios for conventional loan qualification.
- Down Payment Calculator
Model down payment percentage, loan-to-value, and cash-to-close scenarios for a conventional purchase.
- Home Affordability Calculator
Estimate a purchase price range from income, debts, and a DTI cap you can edit.
- PMI Removal Timeline Calculator
Estimate when scheduled amortization brings a conventional loan to 80% LTV for potential PMI removal.
- Discount Points Break-Even Calculator
Compare the upfront cost of discount points to monthly principal-and-interest savings and estimate a break-even month.
Every calculator here is deterministic and educational. See the methodology page for exact formulas, inputs, and the boundary between education and a licensed mortgage transaction.
Shopping in a high-cost county? Use the 2026 county loan-limit lookup to see the official one- through four-unit conforming limits for your area.
Publishers can add the embeddable 2026 county loan-limit lookup widget to their own site.
Next step
Talk through your conventional loan scenario
Answer a few planning questions. Your request is stored for review by Bolt Home Loans, or call 844-777-BOLT for direct assistance.
Educational request only. Not an application, approval, preapproval, rate lock, or commitment to lend. Bolt Home Loans LLC, NMLS 2784913. Equal Housing Opportunity.