Complete library

Calculators

Browse all practical calculators and open the tool that matches your task.

Calculate batch and per-unit cost with fixed costs, variable costs, discounts, tax and shipping.

Estimate resting energy expenditure with the Mifflin–St Jeor equation, unit conversion and an explicit formula breakdown.

Find the days and weekdays between two dates, with optional inclusive counting and a clear calculation breakdown.

Calculate cross stitch design size and fabric cut size from stitch count, fabric count and margins, or check…

Estimate crochet blanket yarn and whole skeins from a measured swatch or from a known blanket, with an…

Calculate tablecloth size and drop for round, square, rectangular and oval tables, or check the fit of a…

Calculate curtain fullness, ready-made panel count, whole fabric widths and optional pattern-repeat-adjusted cut length in inches or centimeters.

Calculate a menu selling price from cost using a target food cost percentage, gross margin or markup, with…

Calculate food cost percentage for a menu item or period, derive food used from inventory and compare the…

Calculate YouTube watch time from views and average view duration, or find the views or average duration needed…

Calculate audiobook listening time, time saved and required playback speed using source duration, progress and a target listening…

Estimate video duration from script words or calculate a word target from runtime, speaking pace, pauses and visual…