Home Heating BTU Requirement Calculator
Estimates the heating BTU/hour required for a room or home from floor area, temperature difference, and insulation quali...
Estimates the heating BTU/hour required for a room or home from floor area, temperature difference, and insulation quali...
Calculates daily energy balance from calories consumed and Total Daily Energy Expenditure (TDEE). Shows surplus/deficit...
Estimate a child's weight from age using the APLS formula (in kg): for ages 1-5 → 2·age + 8; for ages 6-12 → 3·age + 7....
Compute the National Early Warning Score 2 (NEWS2) used by the NHS for early detection of clinical deterioration. Adds w...
Estimates safe sun exposure time before sunburn risk from UV index, skin type, and SPF of sunscreen.
Calculates BMI = weight(kg) / height(m)², with WHO classification: underweight < 18.5, normal 18.5–24.9, overweight 25–2...
Calculates total body surface area (TBSA) burned in an adult using the Rule of Nines from whether each standard region i...
Compute the hourly maintenance IV fluid rate for a child using the Holliday-Segar 4-2-1 rule: 4 mL/kg/h for the first 10...
Estimate kidney function using the Cockcroft-Gault creatinine clearance equation from age, weight, sex, and serum creati...
Compute the adjusted body weight (ABW) used for some drug-dose calculations in obese patients: ABW = IBW + 0.4 · (actual...
Sum the eleven NIH Stroke Scale items into the total NIHSS score and assign a severity band: 0 no stroke; 1–4 minor; 5–1...
Compute the BISAP (Bedside Index of Severity in Acute Pancreatitis) score from 5 binary criteria available within 24 h o...
Estimated daily calories are a loose target, not a contract. A quick guide to using the number without letting it use you.
BMI is a one-number screen, not a diagnosis. Here is how to read it honestly — and what to look at alongside it.