Health

Body Fat Calculator

Estimate your body fat percentage using the US Navy method based on waist, neck, and heigh

Physics

Gravitational Potential Energy Calculator

Calculate gravitational potential energy using mass, gravity, and height. Essential physic

Health

Calorie Calculator

Calculate your daily calorie needs (TDEE) based on age, weight, height and activity level.

Everyday

Aspect Ratio Calculator

Calculate missing width or height from an aspect ratio, or find the ratio of any image or

Pregnancy

Body Surface Area Calculator

Calculate body surface area (BSA) using height and weight with Mosteller and DuBois formul

Health

Ideal Weight Calculator

Calculate your ideal body weight based on height and gender using multiple popular formula

Physics

Projectile Motion Calculator

Calculate range, max height, and time of flight for a projectile given initial velocity an

Physics

Free Fall Calculator

Calculate the velocity, distance fallen and time for an object in free fall under gravity,

Marine

Tidal Range Calculator

Calculate tidal range and mean tide level from high water and low water heights, and estim

Construction

Stair Calculator

Calculate stair dimensions including number of steps, riser height, tread depth and total

Marine

Anchor Scope and Chain Length Calculator

Find how much anchor chain to pay out when anchoring, based on water depth, bow height, an

Marine

Anchor Swinging Radius Calculator

Determine the safe anchoring swing radius using vessel length overall, chain length paid o

Marine

Rolling Period Calculator

Calculate rolling period and metacentric height (GM) to assess vessel stability, with a qu