Health and Body

How to use this category

Health pages estimate and label the estimate. Body composition, energy, hydration, dates, pace, blood pressure arithmetic, alcohol, insulin ratios, PEth bands, and prescribed pet doses each have their own inputs. Nothing here diagnoses, prescribes, or clears a person to drive. If a page asks for a ratio or a milligram-per-kilogram figure, that number has to come from the clinician or veterinarian. The page will not invent it from weight alone.

Health numbers on this shelf are screening arithmetic and planning arithmetic. They are not a consult. BMI and the Navy tape do not see the same body. Mifflin and Harris-Benedict do not return the same basal rate, so the BMR page prints both. A calorie target built from a fast weekly loss can fall below a floor the page will warn you about. Due dates and ovulation dates assume a cycle story you have to confirm. Insulin math waits for prescribed ratios. Pet volume waits for a prescribed milligram per kilogram. PEth bands are research cut-points with a label that labs disagree. Alcohol estimates use Widmark and then tell you not to drive. Mean arterial pressure is a short formula from two cuff readings, not a monitor printout. A refill date leaves a gap on purpose so a pharmacy has time to respond. Water intake is a starting point from weight, not a medical order. Ideal-weight formulas disagree on purpose so one brand name cannot monopolise the answer. If you need a diagnosis, you are in the wrong building. If you need to see how a public formula behaves, you are in the right one. Read the caution beside the form before you copy a figure into anything that looks like a plan.

The cards above are the whole category, with one sentence on the job each page actually does. Open a page when that sentence matches the decision in front of you. If the sentence is close but the assumption is wrong, read the comparison section on the page before you copy a number into a report, a bid, or a lesson plan.

Worked examples are prefilled so the first result is auditable. Change one input and the ticket updates. The essay under the ticket walks the same arithmetic in sentences, then a second example, then the move that most often breaks the definition. Five questions at the end answer the objections a careful reader raises after seeing the figure. That structure is repeated because the habit of checking is the point, not because the formulas are the same.

Internal links leave this category only when the next formula genuinely lives next door. A standard deviation page may point at variance and at a t test. It should not point at a decking calculator. If you arrived from search on a broad word, use the one-sentence descriptions to discard the near misses. Near misses are how people report a p-value from a test they did not run.

Each worksheet in Health and Body keeps one H1, a canonical URL that matches the tool name, and meta text sized for search snippets. The steps are part of the page, not a hidden modal. If you teach from these pages, project the ticket and the assumptions together so students see the same definition you graded against.

When two tools in Health and Body look alike, read the blurb under each name before you commit. The difference is usually a divisor, a critical value, a waste percent, or a caution that belongs on one page and not the other. That difference is why the URLs stay separate.

Reviewed 21-10-2026. Pages in Health and Body currently include BAC Calculator, Banfield Dosage Calculator, BMI Calculator, BMR Calculator, Body Fat Calculator, Calorie Deficit Calculator, Due Date Calculator, Ideal Weight Calculator, Insulin Calculator, MAP Calculator, Ovulation Calculator, PEth Test Calculator, Refill Date Calculator, TDEE Calculator, Water Intake Calculator.

Every health and body page

• BAC Calculator Widmark estimate of blood alcohol from drinks, weight, sex factor, and hours.
• Banfield Dosage Calculator Converts a veterinarian's mg/kg instruction into a dose volume from concentration.
• BMI Calculator Body mass index from metric or imperial height and weight.
• BMR Calculator Basal metabolic rate from Mifflin-St Jeor and Harris-Benedict equations.
• Body Fat Calculator U.S. Navy body-fat estimate from waist, neck, height, and (for women) hip.
• Calorie Deficit Calculator Estimates daily intake from TDEE minus a chosen weekly loss pace using 7700 kcal per kg.
• Due Date Calculator Naegele's rule: last menstrual period plus 280 days, with optional cycle-length adjustment.
• Ideal Weight Calculator Shows Devine, Robinson, and Miller ideal-weight formulas side by side.
• Insulin Calculator Meal bolus from carbs÷ratio plus correction from (BG−target)÷factor, minus IOB.
• MAP Calculator Mean arterial pressure from systolic and diastolic blood pressure.
• Ovulation Calculator Estimates ovulation and a fertile window from LMP and cycle length.
• PEth Test Calculator Maps a PEth ng/mL result into common interpretive bands used in lab reports.
• Refill Date Calculator Projects when a prescription runs out and suggests a refill date with a safety gap.
• TDEE Calculator Multiplies BMR by an activity factor to estimate total daily energy expenditure.
• Water Intake Calculator Starting-point daily water volume from body weight and an optional activity add-on.