Health & Fitness Tools

Convert HbA1c (%) to estimated average glucose with the NGSP/DCCT formula (eAG mg/dL = 28.7 × A1c − 46.7). Educational only — lab methods differ (IFCC mmol/mol vs NGSP %), and this is not a diagnosis.

pH, PaCO₂ and bicarbonate classified into the primary disorder with the expected compensation checked against Winter's formula, plus A-a gradient, P/F ratio and respiratory failure typing. kPa or m...

Anion gap with albumin correction and delta ratio, corrected sodium for hyperglycaemia, corrected calcium for albumin, calculated osmolality with the osmolar gap, and the urine anion gap. SI or US ...

The five components at 1, 5 and 10 minutes with the trend across all three, the resuscitation bands, and the caveats about prematurity. Held in memory only — nothing is written to this browser.

Most UK powders use 1 level scoop per 30 ml of water (check the tin). Water first, then powder. This is arithmetic — NHS mixing and sterilising steps still apply, and never microwave a bottle.

Babies run on wake windows — how long they can stay awake before they need to sleep again. It changes fast in the first year and getting it wrong by half an hour is usually the difference between a...

Home-monitor numbers compared with NHS adult clinic bands (and a note on AHA). One reading is not a diagnosis. Seek urgent help for chest pain, one-sided weakness, or a sudden severe headache. This...

Calculate your Body Mass Index (BMI) with accurate WHO classification. BMI is a simple screening tool for weight categories that may lead to health problems.

Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using scientifically validated formulas.

Estimate body surface area with Mosteller, Du Bois and Haycock formulae from height and weight. Used for some drug doses and cardiac index. Educational only — never override a prescribed dose.

Estimate your body fat percentage using the U.S. Navy method and understand your fitness level.

Rough weeks to a goal weight from a daily calorie deficit. Uses ~7,700 kcal per kg (about 3,500 kcal per lb). Real bodies adapt — this is a sketch, not a promise, and not medical advice.

Estimate daily calorie needs with BMR calculation, weight goals, and macronutrient breakdown. Auto-saves profiles for quick access.

Stroke risk and bleeding risk for atrial fibrillation side by side, with the sex-adjusted anticoagulation thresholds, the Friberg annual stroke rates, and the modifiable-risk checklist that HAS-BLE...

Track your child's growth, compare with WHO percentiles, and monitor development milestones.

Holliday-Segar maintenance, dehydration deficit replacement with the 8-hour split, and burn resuscitation with a Rule-of-Nines TBSA helper that counts down the first-8-hour window from the time of ...

100% offline emergency triage protocols, acoustic CPR rhythm metronome, water survival calculator, and optical SOS distress beacon. Operates completely without internet during grid blackouts and na...

Race-free CKD-EPI 2021 eGFR plus Cockcroft-Gault creatinine clearance side by side, with KDIGO G-stage and the renal dosing bands that hang off them. Runs offline in your browser.

Calculate your comprehensive fitness score with detailed insights and personalized recommendations. Based on scientific health metrics and activity analysis.

Adult and pre-verbal paediatric GCS with the 2014 wording, "not testable" handled properly, the E-V-M string for the notes, and the NICE deterioration thresholds. Nothing is stored or sent anywhere.

Calculate Karvonen training zones, VO₂ max estimates, heart rate variability (HRV), and recovery metrics. Professional-grade analytics for athletes!

Calculate your personalized daily water intake needs. Track your progress throughout the day!

Get a comprehensive analysis of your ideal weight range using multiple scientific formulas and personalized factors.

Allergens hide behind nicer names: “caseinate” is milk, “arachis oil” is peanut, “hydrolysed vegetable protein” is often wheat, and E220–E228 are sulphites. Paste an ingredient list — from a packet...

Pick a 16:8, 18:6, 20:4 or custom fast and see today’s eat-from / eat-until times. Educational scheduling only — not medical advice, and not for anyone who is pregnant, under 18, or has an eating-d...

mL/h ⇄ drops/min for any giving set, weight-based dose rates from the concentration in the bag, and time-to-empty with the clock time it finishes. Everything works out on your device.

Estimate your lean body mass using multiple formulas and get detailed body composition analysis.

🏋️ Achieve your goals: Calculate protein, carbs, and fats for weight loss, muscle gain, or maintenance. Get personalized meal plans and food suggestions.

MAP ≈ (systolic + 2 × diastolic) / 3, plus pulse pressure. A resting MAP near 70–100 mmHg is often cited as adequate organ perfusion. This is arithmetic, not a diagnosis — chest pain or a very high...

Estimate your metabolic age based on your Basal Metabolic Rate (BMR) compared to population averages. 💡 Lower metabolic age indicates better metabolic health

Royal College of Physicians National Early Warning Score 2 with both SpO₂ scales, the single-parameter-of-3 rule and the RCP escalation table. Shows which band each observation landed in so the sco...

Instantly estimate your maximum lifting capacity across multiple formulas.

Estimate ovulation and the fertile window from the first day of your last period and your typical cycle length. Sperm can survive up to five days, so the window starts before ovulation. Calendar me...

Estimate your due date from the first day of your last period, conception date, IVF transfer or a scan-dated due date. See how many weeks and days pregnant you are today, the current trimester, key...

IOM/NAM ranges by pre-pregnancy BMI for a singleton: underweight 12.5–18 kg, healthy 11.5–16 kg, overweight 7–11.5 kg, obese 5–9 kg. A sketch for conversations with a midwife — not a target you mus...

Estimate a daily protein target from body weight and how hard you train. Sedentary adults often sit near 0.8 g/kg; strength athletes commonly use 1.6–2.2 g/kg. Not a prescription — kidney disease n...

QTc (Bazett) = QT ÷ √(RR), with RR = 60 / heart-rate. Also shows Fridericia (QT ÷ RR⅓). Educational arithmetic from numbers you type — not an ECG, not a diagnosis. Chest pain or syncope needs emerg...

Calculate optimal wake-up times based on 90-minute sleep cycles for better rest. No affiliate links - this site is supported by user contributions .

A pack a day is a used car every year. Set what you actually smoke, pick a quit date, and watch the money timeline — plus the recovery milestones your body hits along the way.

Convert steps walked to calories burned with precision. Calculate energy expenditure based on steps, weight, and walking pace. See equivalent activities and track progress toward daily goals. This ...

Classic Tabata is 8 rounds of 20 s work / 10 s rest (4 minutes). Phone speakers optional. If you prefer reduced motion, the digits still count without the pulse.

Nothing here cures tinnitus — no app does. What helps is not silence: a quiet, boring sound at or just below the pitch of the noise stops your brain listening for it. This makes those sounds on the...

Optometrists’ rule for screen strain: every 20 minutes, look at something 6 metres (20 feet) away for 20 seconds. This runs the cycle for you — start it when you sit down to work.

UK units = ABV (%) × volume (ml) ÷ 1,000. The NHS low-risk guideline is 14 units a week, spread out, with several drink-free days. This is arithmetic, not medical advice.

Estimate your VO₂ Max — a measure of aerobic fitness. The higher the value, the better your cardiovascular endurance.

NICE NG246 uses waist ÷ height as a central-adiposity screen for adults with BMI under 35. Measure the waist at the midpoint between the last rib and the hip bone. Not a diagnosis.

Calculate your waist-to-hip ratio and see your health risk category based on WHO guidelines.

mg/kg to milligrams, milligrams to millilitres at the strength you have, split across divided doses, with a hard-stop check against the maximum dose you set. No account, no data leaves the page.