EXACT CALCULATIONS
Date tools use calendar arithmetic for values such as elapsed days, weekdays and milestone dates. We avoid replacing real month lengths and leap years with convenient but inaccurate shortcuts.
About EgoTools
EgoTools is a collection of small interactive tools built around curiosity: age, time, birthdays, money, personal statistics and internet nostalgia.
The rule behind the site
A result should either be a real calculation with its assumptions explained, a sourced fact, or clearly labelled entertainment. We do not want a fun quiz to masquerade as scientific population data.
Why so many tools?
Curiosity rarely ends with one question. Someone who asks “how many days have I been alive?” may also want to know their age on Mars or how many weeks they have lived. The tools are therefore designed as a connected collection rather than isolated pages.
Current version
The current site is a lightweight HTML, CSS and JavaScript project. Most calculations happen directly in the browser. Some history and birthday features request public Wikimedia data when available.
HOW EGOTOOLS IS BUILT
Useful first, playful second
EgoTools is a collection of small interactive calculators, personal-stat tools and mini-games. The aim is not to manufacture dozens of empty landing pages: every public tool is meant to do a real calculation, create a real interaction or explain exactly what its entertainment score does and does not mean.
TRANSPARENT ESTIMATES
When a result cannot be exact — heartbeats, natural cycles or effective hourly value, for example — the assumption is shown. An estimate is labelled as an estimate instead of being presented with fake precision.
ENTERTAINMENT STAYS ENTERTAINMENT
Quizzes and mini-games can be fun without pretending to be psychology, medical testing or population research. EgoTools does not invent percentiles, diagnoses or “only 1% of people are like you” claims when no trustworthy data exists.
External data is identified
A small number of birthday-history tools retrieve public Wikimedia/Wikipedia knowledge data. Those results are treated as sourced discovery content, can be temporarily unavailable and are never described as a complete census or original EgoTools reporting. The rest of the core calculators work from the values you enter in the browser.
Corrections and iteration
We review calculations, wording, translations and interaction states as the site evolves. If a tool is an estimate, its assumptions should remain visible; if a game is only for fun, its limits should remain visible; and if a calculation can be exact at date level, the interface should not weaken it with a rough shortcut.
Who, how and why
EgoTools is published under the EgoTools name. Guides are attributed to EgoTools Editorial rather than to a fictional individual author.
WHO
EgoTools Editorial is responsible for explanatory copy, assumptions, source notes and corrections.
HOW
Tool logic is defined first. Examples are checked against the same calculation. External facts are linked to public sources where relevant. AI-assisted drafting or translation may be used, but published copy is reviewed against actual tool behaviour and stated assumptions.
WHY
Each page should stand on its own as a calculation, transparent estimate, sourced discovery experience or clearly labelled piece of entertainment.
Last editorial review: 21 August 2026. Review dates are changed when content or methodology is materially reviewed, not simply to make pages appear fresh.
WHO WRITES AND REVIEWS EGOTOOLS?
EgoTools is published by EgoTools Editorial. Tools and explainers are developed with software-assisted workflows, including AI where useful, but the site remains responsible for the final calculation logic, wording, limitations, links and user experience. Our public Editorial & Methodology page explains how we separate exact calculations, estimates, browser measurements and entertainment scores.