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20 free health calculators · ICMR & WHO guidelines

Free health calculators,
built for everyone.

Check your BMI on ICMR Asian cut-offs, your body fat percentage, calorie deficit, protein target and the sugar hidden in any Indian food. Twenty tools, every formula published and cited. No sign-up, no fees.

Try your own numbers
BMI
WHO · Western
ICMR · Indian
15 23 25 40
Enter your height and weight to see both verdicts.
Food intelligence

One search. Calories, sugar and glycemic load.

Most nutrition databases were built around sandwiches and cereal. Ours starts with roti, dal, poha and gulab jamun — 9,100 foods with glycemic data and 3,000 with sugar broken into natural and added.

Sugar is split into natural and added, because only added sugar counts against the WHO daily limit of 25 g. A mango and a biscuit can hold the same sugar and mean opposite things.

Gulab Jamun
1 piece · 50 g
150kcal
Calories
44g
Sugar / 100 g
52
Glycemic index
Added sugar per serving
One piece uses 72% of your daily added-sugar limit.
Two more answers

One set of numbers. Two more answers.

What you should weigh on Indian cut-offs, and how old your metabolism actually reads.

Sex
Ideal weight ICMR 18.5–22.9
KG IDEAL RANGE

Devine
Hamwi
Robinson
Miller
Open the full Ideal Weight Calculator →
Metabolic age Mifflin-St Jeor
YEARS VS YOUR AGE

Your BMR kcal
Lean mass kg
Open the full Metabolic Age Calculator →
Why we built it this way

A BMI of 24 is not the same everywhere.

At an identical BMI, South Asians carry more visceral fat and less muscle than European populations. Type 2 diabetes and cardiovascular disease appear at lower body weights, which is why ICMR moved the overweight threshold to 23.0 while WHO's international chart still begins at 25.0.

Use a Western calculator and you can sit comfortably inside "healthy" while your actual risk is climbing. Every DialFit tool applies the Indian cut-off where one exists, and tells you plainly when the two disagree.

Referenced throughout: ICMR-NIN · WHO Asian BMI cut-offs (Lancet 2004) · IFCT 2017 · USDA FoodData Central · International GI Tables (Atkinson 2021) · IDF Diabetes Atlas
20
Free tools — no login, no ads, no paywall
9,100
Foods with glycemic index and load
3,000
Foods with sugar split natural vs added
23.0
The ICMR overweight threshold we use, not 25.0

Start with the number
that worries you most.

No account, no email, no upsell. Type what you know and get an answer in under a minute.

Results are estimates. Consult a doctor before making health decisions.

Common questions

Short answers, no hedging.

The questions people ask before they trust a number. Three of these answer themselves — put your own figures in.

See all 20 calculators →
01What is a healthy BMI, and why do Asian and Western standards differ?

On Western scales a BMI of 18.5 to 24.9 is healthy. For South Asian bodies, WHO research shows health risks begin earlier, so DialFit flags 23 and above as raised and 25 and above as high. This is because Indian bodies tend to carry more visceral fat at the same BMI, raising diabetes and heart risk sooner. Open the BMI Calculator →

02What should I weigh for my height?

There is no single number. Four medical formulas — Devine, Hamwi, Robinson and Miller — give one range, and the ICMR healthy BMI band of 18.5 to 22.9 gives another. At 170 cm that band is roughly 53.5 to 66.2 kg. The Ideal Weight Calculator shows both, adjusted for your frame size.

03How much sugar should I have in a day?

The WHO recommends keeping added sugar under about 25 grams a day, roughly 6 teaspoons, for an adult. Naturally occurring sugar in whole fruit and plain dairy is counted differently. Use the sugar checker on this page to see the added sugar in any food in teaspoons before you eat it. Open the Sugar Calculator →

04How many glasses of water should I drink a day?

A common guide is about 8 glasses, but your real need depends on body weight, roughly 33 ml per kilogram, plus more in hot weather or with exercise. The Water Intake Calculator gives a personalised daily target in litres and glasses.

70kg 2.3L 9 glasses a day
05What time should I go to sleep to wake up feeling refreshed?

Sleep runs in roughly 90-minute cycles, so waking at the end of a cycle feels more refreshed than waking mid-cycle. To wake at 7 AM, good bedtimes are around 9:46 PM, 11:16 PM or 12:46 AM. The Sleep Calculator works out the exact times for any wake-up hour.

06What is a calorie deficit, and how do I calculate mine?

A calorie deficit means eating fewer calories than your body burns in a day, which is how fat loss happens. First find your daily burn with the TDEE Calculator, then subtract 300 to 500 calories for steady, safe weight loss. The Weight Loss Calculator turns that into a dated plan.

07What is metabolic age, and can I lower it?

Metabolic age is the age at which the average person has the same basal metabolic rate as you. If you are 40 and your BMR matches an average 32-year-old, your metabolic age is 32. It is driven mostly by lean muscle mass, so resistance training and adequate protein are the levers. Expect 8 to 12 weeks before it moves measurably. Open the Metabolic Age Calculator →

08What is my maximum heart rate?

The Tanaka formula estimates maximum heart rate as 208 minus 0.7 times your age, which is more accurate for adults than the older 220-minus-age rule. At 35 that is about 183 bpm. Training zones are percentages of that number: 60 to 70 per cent for fat burning, 70 to 85 per cent for cardio. Open the Heart Rate Calculator →

35years 183bpm max
09Are the health calculators on DialFit free?

Yes. All 20 calculators are completely free, with no sign-up, no login and no paywall. DialFit is built on peer-reviewed science using ICMR, WHO and NIH guidelines, and calibrated for Indian bodies.