Built by borrowers, for borrowers.

Why we exist

Most people encounter loan decisions with incomplete information. Lenders quote monthly payments, but the total interest, amortization path, and long-term cost are harder to see. We built this tool so anyone can run accurate scenarios privately on their device, compare offers side-by-side, and model the impact of extra payments or different terms.

Our guiding principle is simple: give people the numbers and the context they need, with zero pressure and complete transparency.

How our calculations work

All core math uses the standard amortization formula that lenders themselves apply for fixed-rate loans. The app (and the explanations on this site) break payments into principal and interest over time, following the same logic used across the U.S. mortgage and consumer lending industry.

• Principal: The amount borrowed.
• Interest rate (APR input): Converted to a monthly rate for compounding.
• Term: Number of monthly payments.
• Extra payments & lump sums: Applied directly to principal to show accelerated payoff and interest savings.

Taxes, insurance, and fees (PITI) are user-entered estimates because they vary by property, location, and lender. We clearly separate what the calculator computes from what must be verified with your lender or tax assessor.

We do not generate or store personalized financial advice. Every result is a simulation based on the numbers you provide.

Real-world grounding

The explanations and examples on this site come from patterns we’ve seen across hundreds of thousands of calculations run by real users inside the app. We don’t share anyone’s personal data. We only use anonymous, aggregated observations (like typical loan terms or rates people test) when they help make things clearer.

We focus on tools that are actually useful rather than pages that just repeat generic formulas.

Our standards and limitations

We’re upfront about what we are and what we’re not:

• We are not a lender, broker, or financial advisor. We don’t arrange loans or give personalized recommendations.
• We don’t have loan officers or certified planners on staff.
• Everything on this site and in the app is for educational planning only. Always verify final numbers with your actual lender.

We try to keep explanations clear, accurate, and based on standard lending formulas. When rules or rates change significantly, we update the content.

Privacy and independence

Core calculations run entirely on your device. Nothing leaves your phone unless you explicitly save a scenario to your account (optional cloud sync via Supabase). We do not sell user financial inputs. Advertising on the free tier is clearly separated from calculation results.

We maintain this site and app independently. There are no affiliate relationships that would bias which lenders or products we mention.

Who publishes this

Loan Calculator is published independently by the team behind Chronos Labs. We build privacy-first utility apps — not lending products. Our only business relationship with financial institutions is none: we do not broker loans, earn affiliate commissions on lender referrals, or sell user financial inputs.

The iPhone app is available on the App Store. This website is its educational companion, offering free browser-based calculators and guides.

Contact

Questions about our methodology, suggestions for new features, or notices about data accuracy can be sent to support@chronos-labs.tech.

Loan Calculator is published by an independent team focused on clear, private financial tools. We are grateful to the hundreds of thousands of users who trust us with their planning.

Editorial standards & updates

We review and refresh content regularly. All calculator explanations use the standard amortization formula recognized by U.S. lenders. When major economic or regulatory changes occur (Federal Reserve policy moves, FHA/VA guideline updates, etc.), we update relevant guides within days.

Our goal is to be the clearest, most accurate free resource for people who want to understand their options before speaking with a lender or servicer.