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.

Calculate electricity costs from power, hours, and price per kWh. Live results, unit conversion, day-to-year totals, currency select, and PDF export.

Calculate 1:X dilution fast. Enter final volume and ratio to get solute & solvent amounts with unit conversion, live results, steps, and PDF export.

Calculate full cords, face cords, and stacked volume from your wood pile’s length, width, and height. Convert units, estimate total cost per cord, and download a PDF summary.

Calculate waist radius and fabric length for full, 3/4, half, or quarter circle skirts. Converts cm/in/yd, includes seam allowances, tooltips, and PDF export.

Plan fuel for any trip: enter distance, economy (L/100km, mpg), and price per L/gal to get fuel used, total cost, and cost per person—live with PDF export.

Calculate trip fuel cost instantly. Enter distance, mpg/km-L or L/100km and fuel price. Live results, unit conversion, summary, and PDF export.