CATEGORY13 tools

Calculators

Quick math, percentages, dates, time, and everyday calculations.

Age Calculator

Calculate exact age in years, months, and days.

Calculate simple mean, weighted average, median, and standard deviation.

Calculate your Body Mass Index.

Calculate your Basal Metabolic Rate, daily energy expenditure, and macronutrient targets.

Count days and business days, or add time to a date.

Calculate whether ethanol or gasoline is more economical and estimate driving range.

Find the score needed on a final exam or project.

Calculate semester GPA and project cumulative targets.

Calculate percentages, discounts, tax, changes, and totals instantly.

Scale recipe ingredients up or down for any target number of servings.

Find the missing value in a direct proportion.

Calculate running pace (min/km, min/mi), finish time, speed, and split tables.

Calculate worked hours, break time, decimal hours, and daily timesheet balance.