Formula-based calculator library

calcoralab

A minimal health and finance calculator app built on deterministic formulas, structured data, and SEO-ready content fields.

Formula-based tools for body composition, metabolism, and daily energy estimates.

10 calculators

Simple planning tools for interest growth, loans, and savings targets.

10 calculators

Estimate body mass index from weight and height.

Estimate daily resting calorie needs.

Estimate daily calorie needs after activity level.

Estimate adult ideal body weight from height and sex.

Estimate body fat percentage with a circumference formula.

Estimate lean body mass from height, weight, and sex.

Calculator sections