About

Built for clear everyday calculations.

ArithPilot is an independent calculator library for people who need fast estimates and want to understand the math behind them.

Our approach

Each calculator is designed around a practical question, a clear result, and a short explanation of the formula or assumption used. The goal is to make common calculations easier without turning the page into a maze.

The site is for students, households, independent workers, small business operators, planners, and technically curious users who need a quick estimate before opening a spreadsheet or official system. Current categories cover finance, fitness and health, math, date and time, conversions, everyday school and security tasks, and engineering or network planning estimates.

How calculations are estimated

Calculators run in the browser and use the values you enter. Many pages use standard formulas, such as loan payment, BMI, weighted average, or standard deviation. Other pages use simplified planning methods, such as effective tax-rate estimates or concrete bag estimates, and explain the main assumptions on the page.

Editorial standards

We write original calculator descriptions, examples, and FAQs for ArithPilot. Finance, health, engineering, and other specialized tools are educational estimates and should not replace professional advice.

Every calculator is expected to include a working form, visible results, method notes, a worked example, common mistakes, limitations, related tools, and FAQ answers. Our methods page explains how calculations and content are reviewed.

Editorial responsibility and corrections

ArithPilot is the publisher and operator of this independent site and is responsible for the formulas, explanations, and source choices it publishes. A source is linked only when it directly supports the page's method, an official rule, or the stated scope; a link is never presented as a substitute for the page's own method explanation. We remove or replace a link when that relationship is not clear.

Calculator pages identify what the model holds constant and what it does not calculate. When a result depends on a current law, employer rule, lender contract, medical assessment, supplier specification, or network environment, the page tells readers to verify that authoritative source. Corrections are reviewed against the formula, the cited material, and a reproducible input example before publication.

What comes next

The site continues to improve coverage, examples, and explanation quality across money, health, math, date and time, conversion, everyday, and science tools. New calculators are added only when they can include a working form, a useful result panel, and clear supporting content.

Report an issue

If a formula looks wrong, an explanation is unclear, or a page does not work on your device, send the calculator name, page URL, values entered, and what result you expected to [email protected]. Feedback is used to improve calculations, wording, accessibility, and examples.