Free Energy Envelope Calculator

How much can I plan for today without using all my energy?

Tell us how much energy you have and what you need to do. You will get a simple plan showing what may fit, what to reduce, and how much energy to leave unplanned. Most people finish in under 2 minutes.

1. How much energy do you have compared with a normal day for you?
2. About how many hours of activity do you think you have in you today?Include anything that takes energy: getting ready, thinking, talking, appointments, chores, work, school, and self-care.
3. Are you still recovering from something you did recently?
4. Is anything happening today that should come before energy planning?
5. How much are you trying to do today?
6. If today looks like too much, how much could you postpone, shorten, or ask someone else to do?
Your free result

Your plan for today

Answer the six questions to see what may fit and what to adjust.
What this tool cannot tell you

This is a planning estimate, not a measurement of your body.

It cannot predict a crash. The calculator cannot measure mitochondrial function, cellular energy, or diagnose post-exertional malaise.

The suggested reserve is simply unused time. It is a planning cushion—not a medically tested amount or a rule you must follow.

Medical needs come first. Follow your clinician's guidance and seek urgent care for new or severe warning signs.