Every calculator here runs entirely on your device. There is no email wall, no account, and nothing to submit: your weight and your answers never leave your browser. Use them, screenshot them, send them to a friend who has been told to "just eat healthier" one time too many.
Questions about these tools
Are the Phaes tools free?
Yes, completely. No account, no email wall, and no trial. Every calculator runs entirely in your browser, so your weight, training, and answers never leave your device and are never sent to us.
Can I use these numbers if I am not in perimenopause?
Yes. Each tool asks where you are in the transition and adjusts accordingly, including the option for someone still cycling normally. The midlife adjustments only apply if you tell it they should.
Is this medical advice?
No. These tools give general information based on published sports nutrition and exercise science ranges for healthy adults. They cannot account for your medical history, medications, or conditions. If you have a health condition that affects what you should eat or how you should train, talk to your doctor or a dietitian.