Your energy needs, and a plan that starts there
Rhybi works out calories and macros from your basal metabolic rate and activity level. Then it drafts a plan that's yours to correct.
Basal metabolic rate and activity
Your BMR comes from the Mifflin-St Jeor formula, then your activity level is applied. Choose cutting, maintenance or bulking.
Or enter your own numbers
If you already have targets, type them in. Rhybi checks that calories and macros add up.
A calculated draft plan
Your energy needs turn into a draft with portions already worked out. It respects allergies, intolerances, exclusions and diet type, with separate training and rest days.
No plan needed
Keep a food diary only, with targets from your energy needs. «What do I eat» suggests a dish in grams, and later meals adapt if you eat something else.
Questions we get
How are calorie needs calculated?
How are calorie needs calculated?
It starts from your basal metabolic rate, based on weight, height, age and sex. That's multiplied by your activity level, and your goal moves it up or down.
Does a calculated plan replace a nutritionist?
Does a calculated plan replace a nutritionist?
No. It's a calculated draft, not a prescription, and Rhybi gives no medical advice. If a nutritionist follows you, they write the plan.
Is the calculator free?
Is the calculator free?
Yes. Energy needs and the portions worked out from them are free, and use no credits.