Protein Calculator for Women

Use this protein calculator to estimate a realistic daily protein target based on your goal, activity level, and age.

If you're a woman over 40, protein matters even more for maintaining lean mass, appetite control, and recovery. Protein intake helps preserve lean muscle during fat loss, but measuring body composition can provide better feedback than scale weight alone. Devices like the Hume Body Pod smart scale estimate body fat and lean mass trends so you can track whether changes in protein intake, macros or training are affecting fat or muscle.

This calculator only gives protein. If you're looking for full macros, go to our macro calculator where you can put in your goals and preferred carbohydrate level.

Not sure what the numbers mean? Read our guide: How Much Protein Per Day for Women to understand the research behind these recommendations.

For decades the federal protein recommendation sat at 0.8 grams per kilogram of body weight, about 0.36 grams per pound. That number was a floor, set to prevent deficiency in the average sedentary adult and it was never meant to be optimal for an active woman or for protecting muscle as we age. That changed this year. The Dietary Guidelines for Americans 2025-2030, released in January 2026, raised the recommendation to 1.2 to 1.6 grams of protein per kilogram of body weight per day, which is roughly 0.55 to 0.73 grams per pound. For a 150 pound woman that moves the target from about 55 grams a day to roughly 82 to 109 grams.

This calculator starts from that updated 1.2 to 1.6 range and then adjusts for the variables that actually move the needle: your goal, your activity level and your age. Active women who strength train generally do best at the upper end of the federal range, and for an aggressive fat loss phase where protecting muscle is the priority, many sports nutrition experts go higher still, toward 0.9 to 1.0 grams per pound. A meta-analysis in the American Journal of Clinical Nutrition found that during weight loss, higher protein intakes preserved more fat-free mass and resting metabolism than standard-protein diets, which is exactly what you want when the goal is losing fat and not muscle.

For active women focused on body composition and holding onto muscle through the menopausal transition, though, the higher range is the one I work from and recommend. For the full reasoning, read my guide on how much protein per day for women, or use the macro calculator for fat and carbohydrate targets too.

Here are daily protein targets in grams, built on the new 1.2 to 1.6 gram per kilogram federal recommendation and extended into the higher range used for fat loss. If you are over 50 or in the menopausal transition, lean toward the higher end of whichever column fits your goal.

How you spread it matters as much as the total. Research in the Journal of Nutrition showed that distributing protein evenly across breakfast, lunch and dinner produced about 25 percent more daily muscle protein synthesis than loading most of it at dinner. A simple target of 30 to 40 grams per meal makes the numbers above far easier to reach.

If you are taking Ozempic, Wegovy, Mounjaro, Zepbound or any other GLP-1 medication, protein becomes even more critical. The STEP 1 trial showed that a meaningful portion of weight lost on semaglutide came from lean tissue, not just fat. Without adequate protein and resistance training, you risk losing the muscle that keeps your metabolism healthy long term.

Check the “I am on a GLP-1 medication” box in the calculator below to get a protein target adjusted for medication-related muscle preservation. For a complete eating framework, see my GLP-1 diet plan with a seven-day meal plan built around these higher protein targets.

As women get older, maintaining lean mass becomes more important for strength, metabolism, and long-term health. Protein supports muscle repair and helps protect lean mass during fat loss, especially when paired with resistance training.

This calculator gives you a practical range you can actually follow. The goal is not perfection. It is building a repeatable protein routine you can maintain during real life.

• Supports appetite control and steadier energy
• Helps protect muscle during fat loss
• Supports recovery from training and daily stress
• Helps maintain strength and function as you age

For a ready-to-follow plan, see the 7-Day High Protein Meal Plan for Women with exact protein per meal and a grocery list.

The new guidelines moved everyone up to 1.2 to 1.6 grams per kilogram, and for women over 40 the case for sitting at the top of that range, or above it, is even stronger. Two things are working against us. The first is sarcopenia, the gradual loss of muscle that begins in midlife and speeds up after menopause. The second is anabolic resistance, meaning an aging body responds less efficiently to the protein it does eat. A study in the Journals of Gerontology found that older adults needed a greater relative amount of protein in a single meal than younger adults to maximally stimulate muscle building. Same meal, weaker response, so the input has to go up to get the same result.

Expert nutrition groups had actually been urging intakes above the old 0.8 gram floor for years, including the European Society for Clinical Nutrition and Metabolism, which recommended higher protein paired with resistance training for older adults well before the federal guidelines caught up. The 2026 update finally brings official guidance in line with what those groups, and most women lifting weights, already knew.

I'm working on all of this myself with my own perimenopause/menopausal transition, I strength train five days a week and I track my lean mass, get blood work through Function Health and Hundred Health, and track on the Hume Body Pod smart scale. As an NASM certified personal trainer, the single change I see make the biggest difference for women over 40 is not a new supplement or a fancier workout. It is finally eating enough protein, consistently, every day. For a done-for-you approach, see my high protein meal plan for women or my guide to strength training to lose weight.

Want the “why” behind your range? See our guide to daily protein needs for women.