Methodology

Last updated: 2026

This page explains how Klyrify selects and implements formulas, states conventions, verifies calculator behavior, and handles updates and corrections. It is a companion to our Disclaimer, which covers the limitations of calculator-based estimates.

Formula selection and implementation

Each calculator has a formula chosen for the specific question it answers. We first define the inputs, units, mathematical relationship, contribution or payment timing, compounding frequency, rounding, and deliberate omissions. The browser implementation is then compared with that written definition so the explanation and code describe the same model.

We verify normal examples independently from the interactive interface, using direct mathematical calculations or authoritative worked examples where suitable. Deterministic regression cases then protect the implementation from accidental changes.

Compounding and timing conventions can differ by calculator

Klyrify does not use one universal compounding convention across every tool. Different calculators intentionally use different, clearly-suited conventions — for example:

• The Compound Interest Calculator compounds monthly, using its documented monthly rate convention.
• The Coast FIRE Calculator uses its documented annual-compounding convention.

Always read the assumptions shown on the specific calculator you are using rather than assuming every tool on the site works the same way.

Assumptions, conventions, and limitations

Assumptions that materially affect a result are stated near the calculator. We distinguish nominal values from inflation-adjusted or real values, describe whether contributions or payments occur at the beginning or end of a period, and identify whether taxes, fees, volatility, changing rates, or jurisdiction-specific rules are outside the model.

Every output is an estimate or projection based on the assumptions entered, not a personalized recommendation or a prediction of what will happen. Small changes in return, time, expenses, or payment timing can meaningfully change a long-range result. Actual results may differ, and no result is guaranteed.

Rounding

Numbers shown in calculator results, tables, and examples are rounded for readability. Internal calculations generally use full numeric precision before that final rounding step. If you reproduce a calculation by hand using the rounded figures shown on the page, small differences from the exact result are expected.

Testing and browser checks

Calculator tests cover normal, zero, invalid, boundary, and large-value cases where they apply. We check that errors are handled without misleading results, displayed rounding matches the stated convention, and formula changes do not silently alter established reference cases.

Pages are also checked in current browser engines and across mobile and desktop viewports for readable inputs, touch targets, focus behavior, overflow, clipped results, usable tables or charts, and JavaScript errors. A calculator is not considered verified from source inspection alone.

Source hierarchy

When a calculation or editorial claim needs an external source, we prefer:

1. official institutions and primary sources;
2. original or authoritative research;
3. established technical or financial references;
4. clearly disclosed standard mathematical conventions.

Sources are selected for the specific claim rather than for reputation alone. Tax rules, contribution limits, fees, and similar figures can change and vary by country, so time-sensitive values should identify their effective date or let the user enter a current value. Klyrify does not claim that every calculator receives external independent review.

Updates and publication responsibility

Ivan Daniel maintains the calculators and is responsible for publication. Formula, code, source, browser, or material explanatory changes are rechecked in proportion to their risk. Material update dates describe substantive changes; shared layout or styling work does not automatically refresh article or guide dates.

AI and automation may assist research, drafting, coding, or testing, but they do not replace human responsibility. See our Editorial Standards for the full policy.

Corrections

If you find a formula that looks wrong, a stale figure, or a factual error, please report it through the Contact page or email smartulethtb@gmail.com. To help us investigate quickly, include:

• the page URL;
• the inputs or assumptions you used;
• the result you expected and why;
• a source or reasoning for the correction, if you have one.

Please do not include sensitive personal financial data (full account numbers, government ID numbers, or similar) in a correction report.

Verified issues are corrected under our corrections policy. Klyrify does not currently carry affiliate links, paid rankings, sponsored placements, or advertising.