Read the rate before the result
A result in grams per day starts with a rate. Health Canada lists an adult recommended dietary allowance of 0.80 grams of protein per kilogram of body weight per day. The published daily allowances use reference body weight. A calculator can show the multiplication, but it cannot decide which reference applies to an individual.
| Input | Value | Calculation |
|---|---|---|
| Body weight | 70 kg | Entered value |
| Reference rate | 0.80 g/kg/day | Named adult reference |
| Converted amount | 56 g/day | 70 × 0.80 |
The example is arithmetic
The 56 g example shows how the units work. It is not a recommendation for a person who weighs 70 kg. If the body-weight input, rate, or unit changes, the result changes. Keep all three values with the output so another person can reproduce the calculation.
A calculator that uses pounds must first convert pounds to kilograms, or it must use a clearly labeled rate that already uses pounds. Mixing the two units produces a wrong conversion even when the multiplication itself is correct.
A custom rate needs its own label
A custom rate is a value entered by the user. It is not selected or endorsed by BodyNumeral. Different references can apply to different populations or purposes. The calculator should retain the rate name, the unit, and the source where one is provided.
This guide does not assess kidney disease, pregnancy, breastfeeding, food intake, exercise, or other factors that can change nutrition decisions. It also does not predict a health or performance result.
Use the result as a recordable conversion
- Save body weight and its unit.
- Save the grams-per-kilogram rate and its source or label.
- Keep the date and whether the value is a reference or a custom input.
- Use a separate record if you change the rate or the body-weight input.
Use the protein calculator for the conversion. Use the macro calculator when you need to see protein grams as one part of a calorie split.
Common questions
What does 0.8 g/kg/day mean?
It is an adult protein reference rate. Multiplying it by a body-weight value is a unit conversion, not a personal assessment.
Why can two protein calculators show different results?
They may use different reference rates, body-weight inputs, units, or population assumptions. Keep the rate name with the result.
Can this result replace nutrition advice?
No. This guide does not assess health conditions, pregnancy, breastfeeding, food intake, or individual nutrition needs.
CHECK THE EVIDENCESources & limitations2 sources
Sources checked September 21, 2026. These notes explain methods and assumptions. They have not received an independent clinical review.
- Health Canada's Dietary Reference Intake table lists an adult protein recommended dietary allowance of 0.80 grams per kilogram per day and explains that daily allowances use reference body weight.canada.ca
- The National Academies report lists circumstances in which general energy equations need modification or another method, showing why population equations have limits.nationalacademies.org
