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Results: 9
Blood Alcohol Concentration (BAC) Calculator
Explore a rough Widmark blood-alcohol estimate from one drink input or multiple beverages, with major safety limitations made explicit.
Body Surface Area Calculator
Estimate body surface area with eight named equations, age-specific branches and metric or US area units.
Body Type Calculator
Explore body proportions and the 2020 revised FFIT fashion descriptors with their measurement limitations.
Carbohydrate Calculator
Estimate carbohydrate grams from a calorie target and percentage, or explore adult energy-based carbohydrate reference ranges.
Fat Intake Calculator
Convert a selected share of daily calories into fat grams and compare adult energy-based fat-intake reference ranges.
GFR Calculator
Estimate eGFR with adult race-free CKD-EPI 2021 or pediatric bedside Schwartz equations, using creatinine and model-specific inputs.
Macro Calculator
Convert a daily energy target into protein, carbohydrate and fat grams, or explore adult reference ranges from body measurements.
Protein Calculator
Estimate daily protein grams from body weight and a chosen g/kg target, or compare adult energy-based protein reference ranges.
TDEE Calculator
Estimate total daily energy expenditure by combining an adult resting-energy equation with your selected activity factor.
Checking the scope of health reference tools
Specialized health calculations need inputs that match the selected model, including the appropriate age group and measurement units. A laboratory-based estimate answers a different question from a body-measurement or alcohol model. Read the field labels and source notes before entering values copied from another report.
A calculated reference value cannot establish a diagnosis or a safe action on its own. The tool does not know a person's full medical context, medication use, or other measurements. Use the page's limitations to understand when professional interpretation is needed.
Compare the questions
| Choose a method | Inputs | Method |
|---|---|---|
| GFR Calculator Adult CKD-EPI 2021 |
| eGFR = 142 × min(Scr/κ,1)^α × max(Scr/κ,1)^−1.200 × 0.9938^age × 1.012 (female). How it works |
| Blood Alcohol Concentration (BAC) Calculator Alcohol estimate |
| Alcohol grams = volume(mL) × ABV × 0.789. Estimated BAC% = grams / [weight(g) × distribution factor] × 100 − 0.015 × hours. How it works |