Training calculators
Three things people work out on the back of a notebook between sets. These run entirely in your browser, need no account, and nothing you type is sent anywhere.
One-rep max calculator
Estimate your 1RM from any set of ten reps or fewer, and get the percentage table that goes with it.
Running pace calculator
Give it any two of pace, time and distance and it works out the third, plus your splits.
Barbell plate calculator
Tells you exactly what goes on each side of the bar, and what to do when the number does not divide.
Calculators guess. A log knows.
An estimate is useful once. A record of what you actually lifted, every week for a year, is useful forever — and it is free.