Date Calculator Studio
$0.00
Days between dates, business days, add-days and age — free forever. Date Calculator Studio is a practical single-file tool you own outright — no subscription, no login.
• Days between any two dates — calendar days and weeks calculated instantly
• Business days counted separately — weekends excluded, so deadlines and delivery promises are realistic
• Add or subtract days — find the exact date 30, 60 or 90 days from any start date
• Age calculator included — exact age in years from any date of birth
• Countdown to a target date — days remaining from today to your end date at a glance
• 100% free and 100% offline — no signup, no ads, nothing leaves your browser
Contracts, trials, visa runs, delivery windows and project deadlines all turn on date maths that is easy to get wrong by hand. This free studio calculates calendar days and business days between any two dates, adds or subtracts any number of days from a start date, works out exact age from a date of birth, and counts down to a target date. Download it once and it works offline forever, with no ads and no signup.
HOW TO USE: 1. After checkout, download the ZIP and unzip it. 2. Double-click date-calculator-studio.html — it opens in any modern browser, no install, no signup. 3. Enter your details, use the tool, and copy / save / export your results.
WHO IT’S FOR: Digital nomads, online sellers, freelancers, creators and solo business owners who want a practical tool they own outright — no subscription, no login, no data leaving their machine.
WHAT YOU GET: • date-calculator-studio.html — the complete tool in the downloadable ZIP (works offline, yours forever) • Free lifetime updates to the file • Instant download after checkout
