健康与健身

根据身高和体重计算你的身体质量指数 (BMI)，并给出 WHO 体重类别。

使用美国海军围度法，根据以厘米为单位的颈围、腰围、臀围和身高测量值估算你的体脂百分比。

使用 Mifflin-St Jeor 公式计算你的每日热量需求 (TDEE)，并得出用于减重、维持或增重的目标热量。

根据末次月经 (LMP) 计算你已怀孕几周几天，并显示孕期阶段、预产期和剩余天数。

根据你的年龄以每分钟心跳次数计算你的最大心率和五个训练区间，让有氧锻炼更高效。

使用广泛采用的 Devine 公式，根据你的身高和性别以千克求出你的理想体重，并给出一个健康参考范围。

使用 Epley 公式从一组训练估算你的单次最大重量 (1RM)，并提供训练负荷百分比表（95%–70%）及对应目标重复区间。

根据末次月经和周期长度估算你的排卵日和易孕期，以及你下次预计来月经的日期。免费的排卵与生育力计算器。

逐周追踪你的怀孕进程。输入末次月经，即可知道你当前的孕周、孕期阶段、预产期以及怀孕进度。

根据末次月经和周期长度，使用内格勒法则估算怀孕预产期。查看孕周、孕期阶段和受孕日期。

计算你的腰臀比 (WHR)，并根据世界卫生组织针对男性和女性的阈值查看你的健康风险类别。

根据你的体重和每日运动量估算你每天应该喝多少水，以升、毫升和杯显示。

使用 Mifflin-St Jeor 公式估算你的基础代谢率 (BMR) 和每日热量需求。

使用简单而准确的 Mosteller 公式，根据身高和体重以平方米计算体表面积 (BSA)。

计算减重所需的每日卡路里目标。输入你的维持热量 (TDEE) 和每周目标，即可得到安全的每日摄入量和热量缺口。

使用《身体活动概要》中的 MET 值估算运动期间消耗的卡路里。选择一项活动，输入你的体重和时长。

根据你的末次月经或预产期，估算受孕日期，并给出几天的可能易孕受孕窗口。

使用 Boer 公式，根据体重、身高和性别以千克估算你的瘦体重 (LBM)，外加近似脂肪量。

为均衡、低碳水或高蛋白饮食配比，将每日热量转换为碳水化合物、蛋白质和脂肪的克数。

根据你的末次月经和平均周期长度，预测接下来 3 次月经的开始与结束日期，以及预计排卵日。

根据距离和完成时间计算你以分钟每千米计的跑步配速、以 km/h 计的速度以及每英里配速。

利用 90 分钟睡眠周期找到最佳就寝时间或起床时间。在两个周期之间而非周期中途醒来，会让你更精神、更不昏沉。

使用 Mifflin-St Jeor 公式，根据你的基础代谢率和活动水平估算每日总能量消耗 (TDEE)，并给出减重、维持和增重的卡路里目标。

Calculate the Ankle-Brachial Index (ABI) from ankle and arm systolic pressures to screen for peripheral arterial disease (PAD).

Calculate your Army Combat Fitness Test (ACFT) score for all six events and see your total out of 600.

Calculate the urine albumin-to-creatinine ratio (ACR) from a spot urine sample to assess kidney health and CKD albuminuria category.

Estimate VO₂max from the Queens College Step Test 3-minute protocol — enter your 15-second post-exercise pulse count to get your aerobic fitness category.

Calculate the Apnea-Hypopnea Index (AHI) from a sleep study and classify sleep apnea severity per AASM guidelines.

Calculate the Absolute Neutrophil Count (ANC) from a CBC differential and classify neutropenia severity.

Calculate the APRI score (AST-to-Platelet Ratio Index) to estimate the probability of liver fibrosis and cirrhosis.

Estimate your blood alcohol concentration (BAC) using the Widmark formula. Enter drinks, weight, sex and time elapsed.

Calculate your Body Adiposity Index (BAI) — an estimate of body fat percentage from hip circumference and height, requiring no scale.

Analyse your basal body temperature (BBT) reading against your follicular baseline to detect the post-ovulation thermal shift and estimate cycle phase.

Calculate Biologically Effective Dose (BED) and EQD2 for any radiation therapy fractionation schedule using the linear-quadratic model.

Estimate Basal Energy Expenditure using the revised Harris-Benedict equation with optional stress and activity factors for clinical nutrition.

Score the Brief Interview for Mental Status (BIMS), a CMS MDS 3.0 cognitive screening tool used in nursing homes — three parts, total 0–15.

Calculate your Body Roundness Index (BRI) from height and waist circumference — a shape-based body fat estimate that outperforms BMI.

Calculate body surface area (BSA) in m² using the Mosteller, Du Bois, or Haycock formula — with a side-by-side comparison of all three.

Calculate the age-adjusted Charlson Comorbidity Index (CCI) from patient age and weighted comorbid conditions. Estimates 10-year survival probability.

Estimate creatinine clearance (CrCl) and kidney function stage using the Cockcroft-Gault equation from age, sex, weight, and serum creatinine.

Look up the NIH Dietary Reference Intake (RDA/AI) for protein, fibre, vitamins, and minerals by age and sex.

Calculate your estimated due date and current pregnancy week using Naegele's rule, adjusted for your personal cycle length.

Estimate your kidney filtration rate (eGFR) using the CKD-EPI 2021 race-free equation from serum creatinine, age, and sex.

Calculate your new ELO rating and points gained or lost after a match using the standard ELO formula for win, draw, or loss.

Calculate power output, calories burned and distance for a rowing ergometer workout from your 500 m split time using the Concept2 formula.

Estimate how long EtG (ethyl glucuronide) remains detectable in urine after alcohol consumption, based on drinks consumed and time elapsed.

Calculate your daily fat intake in grams from total calories and a fat percentage target, with protein, carb, and saturated fat breakdowns.

Calculate the Front of Center (FOC) percentage for an arrow using length and balance point — essential for tuning accuracy and stability in archery.

Calculate a premature baby's corrected (adjusted) age by subtracting weeks born early from their chronological age.

Calculate the Glycemic Load (GL) of a food from its Glycemic Index (GI) and carbohydrate content per serving.

Calculate the Glucose Infusion Rate (GIR) in mg/kg/min from dextrose concentration, infusion rate, and patient weight.

Calculate the Glasgow Coma Scale score from eye, verbal, and motor responses to assess level of consciousness.

Calculate the Hepatic Steatosis Index (HSI) from ALT, AST, BMI, sex and diabetes status to screen for non-alcoholic fatty liver disease.

Calculate ICC(1,1) or ICC(1,k) from one-way ANOVA mean squares to assess inter-rater or test-retest reliability, plus SEM and MDC₉₅.

Calculate the validated ICH Score (0–6) from GCS, hemorrhage volume, IVH, location and age to estimate 30-day mortality risk.

Calculate the International Normalized Ratio (INR) from PT, mean normal PT, and ISI — with therapeutic range interpretation for warfarin monitoring.

Calculate the Injury Severity Score (ISS) from AIS region scores to classify trauma severity from minor to unsurvivable.

Estimate LDL cholesterol from Total Cholesterol, HDL and Triglycerides using the Friedewald equation (mg/dL or mmol/L).

Calculate the MCA-PSV Multiple of Median (MoM) for fetal anemia screening using the Mari 2000 formula. For use with specialist guidance.

Convert any opioid dose to morphine milligram equivalents (MME/day) using CDC 2022 conversion factors.

Calculate the Neutrophil-to-Lymphocyte Ratio (NLR) from CBC counts — a rapid blood-test marker for systemic inflammation.

Calculate NNT, NNH, ARR, RRR, Relative Risk and Odds Ratio from control and experimental event rates.

Calculate the real-world noise reduction and protected dBA level from a hearing protector's NRR rating, using NIOSH or EPA methods.

Interpret a post-void residual (PVR) bladder scan — residual fraction, estimated capacity, and clinical severity category.

Calculate the Physiological Strain Index (PSI) from core body temperature and heart rate to quantify heat stress during exercise or occupational heat exposure.

Calculate the heart-rate-corrected QT interval (QTc) using Bazett, Fridericia, Framingham or Hodges formula — with prolongation risk interpretation.

Calculate your Resting Metabolic Rate (RMR) and TDEE using Mifflin-St Jeor or Katch-McArdle — choose based on whether you know your body fat %.

Calculate your bone density T-Score from a DXA scan BMD (g/cm²) and get a WHO classification: normal, osteopenia, or osteoporosis.

Calculate the IV Alteplase (tPA) dose for acute ischemic stroke: total dose, IV bolus, and 60-minute infusion by patient weight.

Calculate the Urea Reduction Ratio (URR) from pre- and post-dialysis BUN values to assess haemodialysis adequacy against the KDOQI ≥ 65 % target.

Calculate wound area reduction (WAR%) from initial and current wound dimensions to track healing progress and apply the validated 4-week 40% threshold.