Calculator

Estimate deck area and board count from deck dimensions and board size.

Estimate fence materials for a rectangular yard from side lengths, gate width, and panel width.

Estimate a target heart-rate zone using the Karvonen method.

Estimate daily protein intake from body weight and a simple training or nutrition goal.

Calculate macro grams from total calories and target percentages for protein, carbs, and fat.

Estimate total daily energy expenditure from metabolism and activity level.

Break an integer into its prime factors for algebra, number theory, and classroom practice.

Estimate required sample size for a proportion using confidence level, margin of error, and expected proportion.

Estimate a confidence interval for a mean using standard deviation, sample size, and a common confidence level.

Estimate percentile rank for a target value inside a dataset.