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Pick your date of birth and a target date - get back exact age in years/months/days, total days, weeks, hours and minutes, your next birthday countdown, and the day of the week you were born.
This age calculator runs 100% in your browser. Nothing you paste, drop, or generate ever leaves your device - no analytics on your input, no uploads, no logs.
Yes - real calendar arithmetic.
Same browser-only philosophy. Free, no signup, no upload.
Find the gap between two dates in years, months, days, weeks, and hours.
Calculate compound interest with principal, contributions, rate, and frequency.
Count business (working) days between dates, skipping weekends.
All-in-one percentage calculator - what is X%, % change, X is what % of Y.
Calculate Body Mass Index (BMI) in metric or imperial with category breakdown.
Calculate monthly loan payment, total interest, and amortization schedule.
We design and ship internal tooling, dashboards, and customer-facing utilities. Tell us what you need and we'll scope it.