Finance

Waist-to-Hip Ratio Calculator

Calculate your waist-to-hip ratio and assess your health risk category based on WHO guidel

Math

Invoice Total Calculator

Calculate invoice subtotal, tax, discount, and final total for billing and freelance work.

Health

Body Fat Percentage Calculator

Estimate body fat percentage using the US Navy method for men and women.

Business

Shipping Cost Calculator

Estimate shipping costs based on package weight, dimensions and shipping zone.

Marine

ETA Calculator

Precise estimated time of arrival calculations for your destination port based on distance

Marine

Speed Converter

Convert between knots, km per hour, mph, and meters per second, with a vessel speed catego

Marine

Marine Bunker Fuel Consumption Calculator

Calculate marine bunker fuel consumption accurately for a single voyage or across a whole

Marine

Rolling Period Calculator

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

Marine

Draft Survey Calculator

Complete draft survey calculator supporting initial, intermediate, and final surveys with

Marine

True Wind Calculator

Convert a ship apparent wind reading into true wind speed and direction, useful for weathe