Everyday

Speed Distance Time Calculator

Calculate speed, distance, or time from any two known values. Supports km/h, mph, and m/s.

Everyday

Speed of Sound Calculator

Calculate the speed of sound in air at any temperature, and convert between Mach and m/s.

Physics

Wavelength Frequency Calculator

Calculate wavelength, frequency, or wave speed for any electromagnetic or sound wave.

Marine

Set and Drift Calculator

Calculate the set (direction) and drift (speed) of ocean current by comparing a vessel's D

Marine

Dead Reckoning Calculator

Estimate a vessel's new position from a starting latitude/longitude, true course, speed an

Engineering

Bandwidth Calculator

Calculate network bandwidth, data transfer time and internet speed requirements for files

Science

Wind Chill Calculator

Calculate the feels-like temperature based on air temperature and wind speed using the off

Marine

ETA Calculator

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

Marine

Distance, Speed & Time Calculator

Calculate distance, speed, or time for any voyage leg, with an ETA mode, multi-leg passage

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

Maritime Intercept Course Calculator

Calculate the precise course and time required to intercept another vessel using vector an

Marine

True Wind Calculator

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

Marine

CPA and TCPA Calculator

Calculate Closest Point of Approach and Time to Closest Point of Approach from radar obser

Marine

Mercator Sailing Arrival Position Calculator

Swiftly discover your arrival coordinates given your departure position, course, speed and

Marine

Maritime Unit Converter

Real-time conversion across multiple maritime categories including speed, length, pressure

Marine

Average Speed Calculator

Calculate the true weighted average speed across multiple voyage legs in knots, kilometers