GramCents
Your money. Your goals. Your protein.
More protein per dollar.
About & safety
About & safety
Your answers are never sent anywhere. Your protein range, grocery list, budget, filters, and the date you last answered the health questions are saved only on this phone. Your health answers themselves, your weight, and your height are not saved. Barcode lookups go to Open Food Facts, but your answers and your grocery list never do.
Education only. Not medical or nutrition advice. Talk to your doctor or a registered dietitian about what is right for you.
The health questions come back every 30 days. If anything changes sooner, tap below to answer them again now.
Product data
Nutrition and ingredient data in this tool comes from Open Food Facts (openfoodfacts.org), a free, collaborative food database. The database is available under the Open Database License (ODbL), and product images under Creative Commons BY-SA.
Accuracy of product information is the responsibility of the manufacturer and the database. Data can be missing, outdated, or wrong. Anything unknown is shown as unknown. Always check the package in your hand.
License and credits
License. Your purchase gives you a personal license to use this tool for yourself and your household. Please do not resell, redistribute, or post this tool or its link publicly. Open Food Facts product data shown in the tool is not covered by this license; it remains under the Open Database License (see Product data above). The tool is provided as is, for education.
Barcode scanning uses ZXing, under the Apache License 2.0. Product data from Open Food Facts (openfoodfacts.org), under the Open Database License.
Phil Tamari
Before you start
For adults 18 and older. If you are pregnant, breastfeeding, or have kidney disease, diabetes, or any medical condition, talk to your doctor or a registered dietitian before changing how much protein you eat.
Are you 18 or older?
Are you pregnant or breastfeeding?
Do you have kidney disease, diabetes, or any other medical condition?
This tool is not the right fit
For adults 18 and older. If you are pregnant, breastfeeding, or have kidney disease, diabetes, or any medical condition, talk to your doctor or a registered dietitian before changing how much protein you eat.
Based on your answers, this calculator will not show a protein range. A doctor or registered dietitian can help you find what is right for you.
Your profile
Your answers stay on this phone. Weight and height are never saved.
Body weight
Height (optional)
How active are you?
Your goal
Which sounds most like your build?
Your suggested daily protein range
This range comes from general guidance for healthy adults, based on your body weight, your activity, and your goal. It is a starting point for education, not a prescription or personalized nutrition advice.
Most people do fine anywhere in the range. Pick a number you can actually reach most days.
Source: the U.S. Recommended Dietary Allowance for protein (0.8 grams per kilogram of body weight for adults) and the International Society of Sports Nutrition position stand on protein and exercise (1.4 to 2.0 grams per kilogram for most exercising adults).
Your weekly budget
Your number, whatever it is. Your grocery list tracks what you spend against it.
Filters
Filters use the ingredients recorded for each product. Recipes change and records can be wrong or incomplete. Always read your own label. This is not a safety guarantee.
Remove foods that contain
Lactose is for lactose intolerance. For a milk allergy, turn on Milk allergy.
Ingredients to avoid
Common other names are matched too, like E955 for sucralose. Foods with no ingredient record show as unknown.
My Grocery List
Typical prices, November 2026. Prices vary by store and region.
Quick guide
- Set your protein targetAnswer a few health questions, then enter your weight, how active you are, and your goal. You get a daily protein range.
- Set your weekly budgetUse the number you actually have. If your list goes over it, the list shows what to put back first.
- Build your listAdd foods from Protein staples, or add your own.
- Scan as you shopScan a barcode, type the number in, or enter the label by hand. Each food gets a plain answer: Great protein value, Okay protein value, or Pricey for the protein. Check items off as they go in your cart.
- Finish your tripSee your protein for the week and what you spent. If you are short on protein, it names the cheapest staple to add.
Trip summary
Add to your list
Your own item
Protein for the whole item, from its label. Leave it blank if you do not know it.
Protein staples
Protein from the book's matrix (chicken: USDA reference). Unknown means not verified; add it from your label. Typical prices, November 2026. Prices vary by store and region.
Scan a product
Lookups use Open Food Facts (ODbL). Your answers and your list are never sent.
Label details
Enter the details from the label.
Item name Price for the package