वयस्क 18 से 30

Blood sugar levels for adults aged 18 to 30

The same thresholds as every other adult age band. The question that actually differs at this age is whether you should be tested at all.

Reference range — adults 18 to 30

99mg/dL or below

The normal fasting band for adults aged 18 to 30 is the band published for every non-pregnant adult: 99 mg/dL or below, with 100–125 mg/dL the prediabetes band and 126 mg/dL or above in the diabetes range. No health authority publishes a separate range for this age.

Same published cut-points at every adult age. What differs at this stage of life is set out below.

स्रोत·ADA Standards of Care 2025 · WHO/IDF 2006·no age-banded range is published by either body·समीक्षित जुलाई 2026

यह पृष्ठ संदर्भ जानकारी है, चिकित्सा सलाह नहीं।

यहाँ कुछ भी आपका निदान नहीं कर सकता, और यहाँ कुछ भी इलाज की योजना नहीं है। रक्त शर्करा के नतीजों की व्याख्या डॉक्टर आपके इतिहास, आपके लक्षणों और दोबारा की गई जाँच के साथ मिलाकर करते हैं — स्क्रीन पर दिखा एक आँकड़ा निदान नहीं होता। अगर कोई भी रीडिंग आपको चिंता में डालती है, या आपकी तबीयत ठीक नहीं लगती, तो वेबसाइट के बजाय डॉक्टर को दिखाइए।

Clinical note

The thresholds on this page are the ones published for all non-pregnant adults. Nothing about them is adjusted for being in your twenties.

What is genuinely age-related is screening — who gets tested in the absence of symptoms. Western guidance has historically started routine screening in mid-life. Indian guidance generally starts earlier, because type 2 diabetes appears at younger ages and at lower body weights in South Asians than in European populations. The national survey found a substantial burden well below the ages at which Western charts suggest looking.

Being young, slim and asymptomatic is a weaker reassurance in India than the international literature implies. Whether you should be tested is a question for a doctor, and family history, waist measurement and blood pressure all feed into the answer.

How a published range becomes the line on your report

A specimen is drawn under a stated condition — fasting means at least eight hours with nothing but water; the two-hour value means two hours into a standardised 75 g glucose drink, not two hours after dinner.
The laboratory reports a concentration: mg/dL in India, mmol/L in the UK, Australia and most of Europe. The measurement is identical; only the unit differs.
That concentration is read against a published cut-point — a figure a named body wrote down in a dated document, not a figure derived from the population being tested.
Two bodies publish, and they agree everywhere except one number. This site prints both rather than picking the one that makes a tidier table.
Confirmation, then interpretation, both belong to a clinician. A value on either side of a cut-point is a reason to see a doctor, never a conclusion.

mmol/L = mg/dL ÷ 18.016
ADA fasting cut-points   99 · 100-125 · 126
WHO fasting cut-points  109 · 110-125 · 126

पूरी विधि →

Panel one

The published criteria — unchanged for this age band

This is the same table that appears on every page of this site, because the thresholds genuinely are the same. If a chart shows you a different range for this age, that chart is not quoting a health authority.

Test results used to identify normal glucose, prediabetes and diabetes in non-pregnant adults, as published by the American Diabetes Association and restated by the US National Institute of Diabetes and Digestive and Kidney Diseases. The mmol/L column is converted from the published mg/dL figures at 18.016 mg/dL per mmol/L.
Result	Published value	Same value in mmol/L
Fasting plasma glucose — at least 8 hours with no food
सामान्य	99 mg/dL or below	5.5 mmol/L or below
प्रीडायबिटीज़	100 to 125 mg/dL	5.6 – 6.9 mmol/L
डायबिटीज़ की रेंज में	126 mg/dL या उससे ज़्यादा	7.0 mmol/L या उससे ज़्यादा
2 hours into a 75 g oral glucose tolerance test
सामान्य	139 mg/dL or below	7.7 mmol/L or below
प्रीडायबिटीज़	140 to 199 mg/dL	7.8 – 11.0 mmol/L
डायबिटीज़ की रेंज में	200 mg/dL या उससे ज़्यादा	11.1 mmol/L या उससे ज़्यादा
HbA1c
सामान्य	below 5.7%	—
प्रीडायबिटीज़	5.7% to 6.4%	—
डायबिटीज़ की रेंज में	6.5% or above	—
Random (any time of day)
डायबिटीज़ की रेंज में	200 mg/dL या उससे ज़्यादा with the classic symptoms of high blood glucose	11.1 mmol/L या उससे ज़्यादा

A result in the diabetes range is not a diagnosis. Published criteria require confirmation — normally a repeat of the same test on a separate day, unless someone has unmistakable symptoms with a clearly raised glucose. Your doctor makes that call, not a chart.

स्रोत·ADA, Standards of Care in Diabetes 2025·restated by NIDDK, NIH·समीक्षित जुलाई 2026

स्रोत: American Diabetes Association, Standards of Care in Diabetes — Diagnosis and Classification of Diabetes. Diabetes Care 2025;48(Suppl. 1):S27–S49. लिंक
स्रोत: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), National Institutes of Health — Diabetes Tests & Diagnosis. लिंक

Panel two

And the WHO version

World Health Organization / International Diabetes Federation criteria (2006), with the 2011 WHO position on HbA1c. WHO publishes in mmol/L; the mg/dL column is the equivalent, as printed in the WHO report.
श्रेणी	Fasting plasma glucose	2 h after a 75 g glucose load
Diabetes	7.0 mmol/L (126 mg/dL) or above	11.1 mmol/L (200 mg/dL) or above
Impaired fasting glucose (IFG)	6.1 – 6.9 mmol/L (110–125 mg/dL)	below 7.8 mmol/L (140 mg/dL), if measured
Impaired glucose tolerance (IGT)	below 7.0 mmol/L (126 mg/dL)	7.8 – 11.0 mmol/L (140–199 mg/dL)

WHO also accepts a random plasma glucose of 11.1 mmol/L (200 mg/dL) or above, in the presence of symptoms, and — since the 2011 consultation — an HbA1c of 6.5% or above. WHO is explicit that an HbA1c below 6.5% does not rule diabetes out.

स्रोत·WHO/IDF consultation, Geneva 2006·published in mmol/L·समीक्षित जुलाई 2026

स्रोत: World Health Organization / International Diabetes Federation. Definition and diagnosis of diabetes mellitus and intermediate hyperglycaemia: report of a WHO/IDF consultation. Geneva: WHO, 2006. लिंक

PeakForm एक ट्रेनिंग और जवाबदेही कार्यक्रम है। यह डायबिटीज़ या प्रीडायबिटीज़ का इलाज नहीं है, यह आपके डॉक्टर की सलाह का विकल्प नहीं है, और इस साइट पर दी किसी भी बात पर डॉक्टर से बात किए बिना अमल नहीं करना चाहिए।

अन्य आयु वर्ग

Children and teenagersवही सीमाएँ वयस्क 18 से 30वही सीमाएँ वयस्क 30 से 45वही सीमाएँ वयस्क 45 से 60वही सीमाएँ Adults 60 and aboveवही सीमाएँ Pregnancydifferent thresholds

Why the age-banded charts you have seen elsewhere are not published by anyone →

इस रिपोर्ट में जिन सवालों की उम्मीद की गई है

What is a normal fasting blood sugar level?

On the American Diabetes Association criteria, 99 mg/dL (5.5 mmol/L) or below. 100 to 125 mg/dL is the prediabetes range and 126 mg/dL or above is in the diabetes range. WHO uses the same 126 mg/dL diabetes threshold but places the lower edge of impaired fasting glucose at 110 mg/dL rather than 100.

What is a normal sugar level after eating?

The published thresholds — 140 and 200 mg/dL at two hours — are written for a standardised 75 g oral glucose tolerance test, not for an ordinary meal. A post-prandial reading after home food is not the same measurement and varies with what was eaten. Doctors do use post-meal readings, interpreted alongside everything else about you.

Does the normal blood sugar range change with age?

No. The diagnostic thresholds published by WHO and the American Diabetes Association are the same for every adult age. Popular "sugar level by age" charts are not published by any health authority. Pregnancy is the one genuine exception, and its thresholds are lower, not higher.

Is one high reading enough to diagnose diabetes?

No. The published criteria require confirmation — normally a repeat of the same test on a separate day — unless someone has unmistakable symptoms alongside a clearly raised glucose. A single number is a reason to see a doctor, not a diagnosis.

What is the normal blood sugar level for adults aged 18 to 30?

The same as for any other non-pregnant adult: fasting 99 mg/dL or below, two-hour glucose tolerance test 139 mg/dL or below, and HbA1c below 5.7% on the ADA criteria. There is no separate published range for this age group.

Thresholds from the ADA Standards of Care, NIDDK and the WHO/IDF 2006 consultation. General information only — NOT medical advice, and never a diagnosis. Only a doctor can interpret your results and diagnose or treat diabetes. If a reading concerns you, see a doctor rather than a website. Every threshold, equation and glycemic index value used on this site is listed with its publication on the डेटा & तरीक़ा पृष्ठ पर, और हर प्रकाशन उसकी जारीकर्ता संस्था और तारीख के साथ सूचीबद्ध है स्रोत सूची.

स्रोत·प्रकाशित संदर्भ सीमाएँ + GI तालिकाएँ·समीक्षित जुलाई 2026

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