Calculate your daily protein intake
Enter your body weight and select kilograms or pounds in the calculator below. It returns a daily range using the 2025–2030 US Dietary Guidelines reference, with the formula and source. The established adult RDA remains a separately labeled comparison; it is not the lower endpoint of that range. You can check the arithmetic with the formula and examples below.
Calculate a protein reference range
Choose the published reference that matches your context.
Complete the fields, then calculate to see the method and result.
US Dietary Guidelines 2025–2030 · ISSN, 2017 · Leidy et al., 2015 · Method reviewed .
Daily protein in grams = body weight in kilograms × reference in g/kg/day.
Convert pounds to kilograms by dividing by 2.2046226218. Select a reference suited to the question you are asking, then calculate each endpoint if that reference is a range.
| Reference | Factor | Calculation at 70 kg | What the number describes |
|---|---|---|---|
| US Dietary Guidelines, 2025–2030 | 1.2–1.6 g/kg/day | 84–112 g/day | The guideline's protein target |
| Established adult RDA | 0.8 g/kg/day | 56 g/day | A dietary reference allowance |
Keep the current guideline range and established RDA separately labeled; they do not form one combined interval.
The current US guidance gives the first range and says to adjust it as needed for individual calorie requirements; this simple multiplication does not perform that assessment. The National Academies reference explains the weight-based RDA. These numbers should keep their labels when copied into a result or food log.
For the general US guideline question answered here, use the 1.2–1.6 range to calculate the guideline target. Keep 0.8 in the comparison row when you specifically want to understand the established RDA; do not combine 0.8 and 1.6 into one invented range.
A result of 84–112 g does not mean a blood test found that you require that precise amount. It is the chosen population reference scaled to a body weight. A 56 g RDA result should not be renamed a maximum or presented as the only current US target.
There is no additional rule in this simple calculator that selects 84, 112 or a midpoint for you. Inspect a complete record of what you eat and any existing professional advice before converting the range into a single target. The guideline asks for adjustment to individual calorie requirements; this weight-only formula cannot determine that adjustment. Showing the full range preserves this remaining decision instead of hiding it behind one precise-looking number.
Why do protein calculators give different answers?
Two calculators can multiply the same weight correctly and still return different amounts because they use different references. Compare the factor, denominator and population before deciding one has made an arithmetic error.
One may display an adult dietary reference; another may choose an exercise range; another may use a weight-loss setting. A tool may also return one selected point within a range without explaining that choice. A visible method lets you inspect those differences rather than treating a larger result as automatically better.
For example, 70 × 0.8 = 56, whereas 70 × 1.2 = 84. The 28 g difference comes from the chosen factors, not from rounding. A pounds-versus-kilograms mistake can produce a much larger discrepancy: entering 154 as kilograms instead of pounds would use the wrong body weight.
For training-specific interpretation, see the protein calculator for training. For an energy-restricted plan, see the protein calculator for weight loss. These pages answer different questions; keep the reference selected here visible when comparing their results.
What does the estimate tell you about what you ate?
Nothing until you record food. Calculated daily intake is a reference amount; eaten intake is the sum of protein from actual portions. A portion's weight is not its protein content.
Consider a hypothetical label with 8 g protein per 100 g. Eating 150 g contributes 12 g protein, calculated as 8 × 150 ÷ 100. Add the other foods and drinks you consumed before comparing the total with a target.
If you have separately chosen a 100 g target and recorded 72 g, the record shows 28 g left to that target. That is bookkeeping. It is not a diagnosis of protein deficiency or proof that you must eat another 28 g immediately.
The macro tracking guide explains sources, quantities and daily totals. The day-report article explains how targets and recorded amounts appear together.
Which details should you check before choosing a target?
Check the source population first. General adult guidance does not resolve every question for athletes, older adults or people with a prescribed nutrition plan. Pregnancy, breastfeeding and childhood require references appropriate to those life stages; this page does not calculate those needs.
Ask whether your clinician or dietitian has specified a protein amount or a different calculation weight. Use that plan rather than silently replacing it with an online preset. With kidney disease, NIDDK advises an individual protein balance with a health professional or dietitian.
The method here scales a named reference by total body weight. It does not infer lean mass, medical suitability or a calorie budget from that weight alone.
Keep the estimate separate from your food record
Once you have selected an appropriate target, keep its source and meaning available alongside the number. That makes a later change easier to explain: a revised reference is different from a correction to yesterday's food portion.
IZeat is the five-star chef calorie tracker that suggests satisfying, great-tasting meals, so you enjoy every calorie you have left. With a compatible assistant connected, you can confirm your chosen target, describe meals and inspect the returned protein total. IZeat records the target and food data; the assistant handles explanations and suggestions. Recording a target does not establish that a calculator has assessed your individual needs.
The connection instructions explain how to connect a compatible assistant before recording a target or meal.
Frequently asked questions
Short answers to the questions people type, each one sourced above.
Is the label's 50 g Daily Value my personal target?
The FDA label guide uses a 50 g Daily Value for protein. That label reference is a different number from your weight-based guideline calculation. Keep its name and purpose attached to it rather than importing it as a personal target from the package.
Should I use my goal weight instead of my current weight?
Do not swap weights silently. The calculation shown uses the entered total body weight. If a health professional specifies another weight or a different method, preserve that instruction and its rationale. This page does not choose an adjusted weight formula.
Can I calculate protein already in my dinner here?
This page estimates a daily amount from a body-weight reference. To calculate a dinner's nutrient content, you need its foods, nutrient values and consumed quantities. That is the separate nutrition calculator, rather than this needs calculation.