Found a bug, spotted a mistake or want a calculator we don't have yet? Send an email to:
We read every message and try to reply within a few business days.
What to include
- For a bug: the page you were on, the numbers you entered, what you expected and what you saw. Your phone or computer model and browser help too.
- For a correction: the sentence or number you think is wrong, and a source if you have one.
- For an idea: what you want to calculate and how you would use it.
What we can't help with
We can't give personal medical, injury or training advice by email. For that, talk to a doctor, a physical therapist or a qualified coach who can see you lift.