Electrolyte Calculator: How Much Should You Restore?

Every session pulls a different amount of sodium, potassium and magnesium out of you, and guessing at your electrolyte needs usually means falling short or overdoing it. This electrolyte calculator takes the guesswork out. Tell it your body weight, how long you were active, and how hard it felt, and it works out roughly what you have lost and what a sensible daily electrolyte intake looks like for you.

It is built for real life, not just race day. Use it after an easy morning walk, a heavy gym session, or a hot day where you barely trained but still sweated plenty. The result gives you a practical target, whether that is one scoop of Restore or a couple through the day, so you are replacing what your body actually used rather than a generic number on a label.

Why Your Electrolyte Needs Change Day to Day

Sodium, potassium and magnesium are lost through sweat at different rates depending on heat, effort and how much you have trained lately. That is why a single fixed daily amount rarely fits everyone, or even the same person on two different days. Run the calculator whenever your routine changes, and check out our Learn hub for more on why daily hydration matters, or head to the shop to stock up on Restore.