What we do
Every day people need small, precise answers about time: how many days until a holiday, how old someone is in seconds, how many working days sit between two dates, which ISO week we are in, or how much of the year is already gone. Those questions are easy to ask and surprisingly fiddly to answer correctly once leap years, month lengths, weekends and holidays are involved. TimeQuick handles that arithmetic for you and shows the result the moment the page loads.
The calculators are grouped into 15 categories — countdowns, date differences, age, retirement, birthdays, sleep, pregnancy, work schedules, year progress, weekday counting, Friday the 13th, and more — so related tools are always one click apart.
How the calculations work
All maths runs in JavaScript inside your browser. Nothing you type is uploaded, stored or logged on a server. Dates are handled with real calendar logic rather than a flat 365-day approximation, so leap years, 28-to-31 day months and daylight-saving shifts are respected. Week numbers follow the ISO 8601 standard by default, with US and Middle East systems available where they matter.
Results that change second by second — such as age in seconds or a live countdown — tick in real time, and every calculator recomputes instantly as you edit an input.
What we believe
- An answer should appear before you finish reading the page.
- Privacy is the default: calculations never leave your device.
- No account, no paywall, no popup between you and the result.
- Clear explanations belong next to every tool, not behind a blog post.
Our commitment to accuracy
Every calculator is built from an explicit formula rather than an approximation, and the assumptions behind it are written out on the page itself: which endpoint is counted, whether weekends are excluded, which week-numbering standard applies, and what a result deliberately does not include. Each page also carries a worked example run against a fixed reference date, so you can see the method applied to concrete numbers before you trust it with your own.
New calculators are checked against independent references before they go live — official calendars for holiday dates, the ISO 8601 specification for week numbers, published provider price lists for cost tools, and hand-computed edge cases around leap days, month ends and daylight-saving transitions. Where a figure is inherently an estimate, such as a pregnancy due date or a projected income, we say so next to the result rather than burying the caveat.
How we maintain and update the site
Calendars and prices move, so the calculators are maintained rather than published and forgotten. Date logic is reviewed at the turn of each year, when leap years, week-53 years and shifted holiday dates are re-verified. Time zone behaviour is re-checked after each daylight-saving changeover. Cost and earnings calculators are reviewed when the platforms or model providers they reference publish new rates, and the assumptions used as defaults are stated on the page so you can override them.
Reported errors take priority over new features. When a correction changes a result, we fix the underlying calculation rather than the wording around it, and we update the explanatory content on the page to match.
Accuracy and feedback
Calendars carry edge cases — regional holidays, differing week-start conventions, time zone boundaries. We test our date logic carefully, but if a result looks wrong for your country or use case we want to hear about it. Tell us what you entered and what you expected on the contact page. Please also read our disclaimer for the limits of what these results can be used for.