Free swimming tools.

Swim a 400 m and a 200 m all out, type the two times and get your CSS pace per 100 m. Free, no sign-up.

Type a distance and the time you swam it to get your pace per 100, your speed, and your time over other distances at the same pace. Free, no sign-up.

Choose a stroke and effort, enter your weight and how long you swim, and get an estimate of the calories you burn. Free, no sign-up.

Real swim workouts made by the SwimSensei engine for three levels and five goals, with every set, rep time and rest. For beginner, intermediate and competitive swimmers.