About AllCalFinance

AllCalFinance is a free suite of financial calculators paired with plain-English educational articles.

Why we built it

Most financial calculators on the web answer one question — your monthly mortgage payment, your retirement nest egg, your credit card payoff date — and stop there. The number is technically correct, but if you don't already understand the math, you're left without context. Should you take a 15-year or 30-year? Is 4% the right retirement withdrawal rate? Will the avalanche method actually save you money?

We built AllCalFinance to close that gap. Every calculator pairs the number with a thorough explanation of the formula, a worked example, common mistakes, and an FAQ — so you don't just see the result, you understand it.

What we offer

• 18 calculators across mortgages, loans, retirement, debt, taxes, and budgeting — all free, with no signup.
• Educational articles covering the formula, a worked example, common mistakes, and 5+ FAQs for each calculator.
• Decimal-safe math — every calculator is unit-tested against published reference values.
• No login required — your inputs stay in your browser and are never sent to us.

Our philosophy

• Education over advice. We help you understand the numbers. We never tell you what to do — that's a job for a licensed professional who knows your full situation.
• No tracking of your inputs. Calculator inputs stay in your browser. We don't store them, don't profile you, and don't sell them.
• Free for everyone. No paywall, no premium tier, no signup. The site is funded by ads.
• No spam. No newsletter pop-ups, no “give us your email to download” friction. You came for an answer; we just give you the answer.

Who we are

AllCalFinance is an independent editorial project. We are not affiliated with any bank, broker, lender, or financial institution. We do not accept paid placements or sponsored content. The only commercial relationship we have with the financial industry is through Google AdSense, which displays ads on our pages — and we have no control over which ads Google shows.

Articles and calculator guides are published under the AllCalFinance Editorial byline. Content is produced by contributors with backgrounds in software engineering and personal-finance research, and reviewed against primary sources before publishing.

Editorial methodology

Every calculator and article on AllCalFinance follows the same process:

• Formulas are sourced from primary references. Tax tables come from the IRS, retirement contribution limits from the IRS and SSA, and consumer-loan formulas from textbook-standard time-value-of-money math. Sources are linked inside the guide section where relevant.
• Math is unit-tested. Every calculator is covered by automated tests that compare its output against known reference values (e.g. a 30-year fixed-rate mortgage at 6% must match a published amortization table to the cent).
• Decimal-safe arithmetic. We use the decimal.js library so currency calculations don't accumulate floating-point rounding errors common in JavaScript.
• Editorial review before publishing. No article or calculator goes live without a second pair of eyes confirming the math, the worked example, and the FAQ accuracy.
• Updated when rules change. Tax brackets, contribution limits, and federal interest assumptions are reviewed at least annually. The publish date and any update date are shown on every article.

Spotted a math error or an out-of-date number? Email us at rcsupport@outlook.com and we will correct it.

Educational use only

Every calculator on AllCalFinance is an educational tool. Results are estimates based on the inputs you provide. They are not a substitute for personalized advice from a licensed CPA, CFP, or attorney. See our disclaimer for full details.

Contact

Have a question, feedback, or a calculator you'd like us to build? Get in touch.