Estimate how long a book takes to read. Enter pages, reading speed, and daily minutes to get total time, pages/day, and days to finish.

Free time calculator to add/subtract time, multiply/divide values, and find exact duration between dates and times. Live results with PDF export.

Quickly calculate time between BC and AD years. No year zero rule built-in, with steps, tips, and one-click PDF.

Get your exact age from date of birth in years, months & days, plus weeks and hours. Includes next birthday. Free, fast, mobile-friendly.

Fast Korean age calculator: convert by birth year or current age. Live results, unit switching, PDF report, and step-by-step derivation.

Add hours, minutes, and seconds fast. Free add time calculator that sums multiple entries, supports days to years, and shows instant totals with steps.

Calculate hair growth by day, week, month, or year. Convert cm/in, estimate time to target length, and project final length. Free tool with PDF export.

Estimate reading and speaking time from word count with our WPM calculator. Live results, unit switching, tooltips, and PDF export—fast and mobile-friendly.

Find ideal desk, chair, and monitor heights for sitting or standing. Live results, unit switching, tooltips, and PDF export for better ergonomics.

Compare price per unit for weight, volume, and items with this unit price calculator. Live results, unit conversion, step-by-step math, and PDF export.