A normal FibroScan range means two things landing within healthy limits simultaneously — liver stiffness below 6 kPa and a CAP score below 238 dB/m. No significant scarring, no significant fat. That’s the clean result. Most people don’t get a clean result explanation with their printout — just two numbers and a reference table that doesn’t tell them what to actually do with the information.
This article is that explanation. What the normal ranges are, what sitting outside them means, and what moves the numbers in either direction.
What Is the Normal Range for FibroScan Results in Adults?
A FibroScan captures two separate measurements in one session. Each has its own normal FibroScan range, and each answers a different clinical question about the same liver.
Liver stiffness (kPa) — measures fibrosis:
Transient elastography sends a vibration into liver tissue and measures how fast a shear wave travels through it. Healthy liver tissue is soft and yielding — the wave moves slowly. Scar tissue is rigid — it transmits faster. The speed translates into a kPa value, which maps to a fibrosis stage.
Normal: below 6 kPa. This places you in the F0–F1 range — no significant fibrosis, liver architecture intact.
CAP score (dB/m) — measures fat:
The Controlled Attenuation Parameter measures how much the ultrasound signal is absorbed by liver tissue. Fat cells absorb the signal more than healthy liver cells. A higher CAP score means more fat has accumulated in liver cells — hepatic steatosis.
Normal: below 238 dB/m. This is S0 — no meaningful fat accumulation.
Both numbers together give the complete picture. A clean normal FibroScan range on both simultaneously is genuinely reassuring. But the more important clinical information often sits in combinations where one is abnormal and the other isn’t — and what those combinations mean in practice.
Understanding the Full kPa Scale — What’s Normal, What’s Not
The liver stiffness measurement in kPa maps to a 5-stage fibrosis classification. The normal FibroScan range sits at the lower end, but the full scale matters for understanding how far a result has moved from healthy.
| kPa Range | Fibrosis Stage | Clinical Meaning |
| Below 6.0 kPa | F0–F1 | Normal / no significant liver fibrosis |
| 6.0–7.9 kPa | F1–F2 | Mild fibrosis — reversible with intervention |
| 8.0–9.9 kPa | F2–F3 | Moderate fibrosis — manageable, needs a plan |
| 10.0–12.4 kPa | F3 | Significant fibrosis — specialist follow-up urgently |
| 12.5 kPa and above | F4 | Cirrhosis range — immediate specialist care |
A few things that don’t appear on the table but matter for reading a result correctly:
These cutoffs are NAFLD-standard — the most common context in India. The thresholds shift slightly for other conditions. Liver fibrosis caused by Hepatitis B or C uses different disease-specific cutoffs, because inflammation from viral hepatitis independently stiffens the liver — sometimes making the kPa reading appear higher than the actual fibrosis stage would suggest. Your gastroenterologist applies the right cutoff for your underlying condition, not just the generic table.
Direction matters as much as the absolute value. A liver stiffness measurement of 7.5 kPa trending down from 9.2 over 12 months of lifestyle changes tells an entirely different story from 7.5 creeping up from 5.8. Same number. Opposite trajectories. Serial FibroScan monitoring is more informative than any single reading precisely because of this.
What Is a Good CAP Score on a FibroScan?
A good CAP score is one below 238 dB/m — S0, no meaningful hepatic steatosis. That’s the baseline worth aiming for.
The full steatosis classification:
| CAP Score | Steatosis Grade | Fat Level |
| Below 238 dB/m | S0 | Normal — minimal to no fat |
| 238–259 dB/m | S1 | Mild hepatic steatosis |
| 260–290 dB/m | S2 | Moderate steatosis |
| Above 290 dB/m | S3 | Severe steatosis |
What makes a CAP score “good” shifts slightly depending on where you started.
Someone with diagnosed fatty liver whose CAP score has dropped from 305 to 261 after 8 months of sustained dietary change and weight loss — that’s genuinely good progress, even though 261 is still in the moderate range. The direction is right, the trajectory is right, and continued intervention will likely bring it further down.
What you’re watching for:
- CAP score falling on repeat FibroScan — confirms that lifestyle changes are working at the liver level, not just on the scale
- CAP score stable or rising despite claimed lifestyle changes — worth an honest conversation about what’s actually changed day to day
- CAP score above 290 combined with a rising kPa — both worsening together is more clinically urgent than either alone; NASH with active fibrosis progression
The CAP score responds faster than the liver stiffness measurement. Fat moves in and out of liver cells on a timescale of weeks to months. Scar tissue takes much longer to form and even longer to regress. So in a 6-month follow-up FibroScan, you’ll typically see the CAP score move meaningfully before the kPa does. That CAP movement is not just a number — it’s confirmation that the liver is responding before the fibrosis marker has time to catch up.
Is a 75 kPa FibroScan Reading Curable?
A kPa reading of 75 is a severe outlier — far beyond the F4 cirrhosis threshold of 12.5 kPa. To put it in context: most cirrhotic patients register somewhere between 15 and 40 kPa. A reading of 75 suggests either very advanced, end-stage liver fibrosis with severe inflammation active simultaneously — or a technical reading affected by a confounding factor like acute hepatitis, severe cardiac congestion, or a scan quality issue.
The clinical reality at that level:
Established cirrhosis — the irreversible structural scarring that produces very high liver stiffness readings — cannot be reversed. The scar tissue replacing healthy liver cells doesn’t disappear. What changes with treatment is the trajectory of what remains. Treating the underlying cause aggressively matters enormously even at this stage:
- Hepatitis B or C as the driver: antiviral therapy reduces viral-load-driven inflammation and can meaningfully lower liver stiffness even in cirrhotic patients, not by reversing scar but by reducing inflammatory stiffness that sits on top of it
- Alcohol as the driver: complete abstinence halts further progression and in some patients with alcohol-related cirrhosis, significant kPa reading reduction is documented within 12–18 months of abstinence
- NAFLD-related: metabolic correction (weight loss, glycaemic control, dyslipidaemia management) slows further liver damage and reduces liver cancer risk
At 75 kPa, the immediate priorities are complication screening — endoscopy for oesophageal varices caused by portal hypertension, imaging for ascites and liver cancer — and a clear specialist management plan. This is not a result to leave on a printout for a future appointment.
Dr. Vibhor Pareek at Gastro Plus sees patients who’ve been carrying severely elevated FibroScan results for months without follow-up because no one adequately explained what the number meant. That gap is exactly what a proper consultation closes.
What Pushes Your FibroScan Result Outside the Normal Range?
Knowing the factors that artificially alter results prevents misreading a one-off scan as a definitive picture.
Factors that falsely raise the kPa reading:
- Eating within 2 hours before the scan — post-meal portal blood flow temporarily increases liver stiffness independently of fibrosis; this is why fasting matters
- Active liver inflammation — elevated enzymes from any acute cause can raise kPa without corresponding structural worsening
- Right heart failure or venous congestion — increased hepatic venous pressure stiffens the liver mechanically
- Acute hepatitis flare — a temporary spike in inflammation creates a falsely high liver stiffness measurement
Factors affecting CAP score reliability:
- Recent heavy meal — eating before the scan artificially inflates the CAP score
- Dehydration — affects signal consistency modestly
- Very high BMI — standard probe depth may be insufficient; an XL probe changes the result meaningfully
Overall scan validity — check your report for:
- IQR/M ratio — printed on most FibroScan reports; should be below 30%. Above 30% means variability between the 10 measurements was high; the result should be interpreted with caution and a repeat considered
- Number of valid shots — ideally 10 of 10; lower valid shot counts reduce reliability
A single FibroScan reading is a starting point. A repeat under better conditions — proper fasting, stable liver enzymes, same machine — gives a more reliable picture before any clinical decision is made.
Acting on Your FibroScan Results — What Comes Next
The normal FibroScan range determines the urgency of what follows. Not every result needs the same response.
Both values normal (kPa below 6, CAP below 238):
Reassuring baseline. If the scan was done to investigate a specific risk factor — diabetes, elevated liver enzymes, family history — address that risk factor and repeat in 1–2 years. A normal result today doesn’t mean the underlying risk has disappeared.
CAP elevated, kPa normal (fatty liver, no fibrosis):
The most recoverable scenario. The liver is fatty but hasn’t started scarring. Lifestyle intervention — sustained weight loss, dietary correction, physical activity — has the highest likelihood of returning the CAP score to normal range. Repeat FibroScan in 6 months to confirm the trend.
kPa elevated, CAP normal (fibrosis without current fat):
The fat may have resolved while fibrosis advanced — sometimes seen in burnt-out NASH, or when the cause is viral (Hepatitis B or C) rather than metabolic. Needs a cause investigation; a normal CAP score here doesn’t mean everything is fine.
Both elevated:
Active fat accumulation with simultaneous fibrosis. The degree determines urgency — F1–F2 needs a structured plan; F3 needs prompt specialist review; F4 needs immediate specialist care and complication screening.
When to See a Gastroenterologist About Your FibroScan Results
Most FibroScan reports are handed over without interpretation beyond a reference table. That’s the gap worth closing — especially when the result falls outside the normal FibroScan range.
See a specialist without waiting if:
- kPa is 12.5 or above — cirrhosis range requires immediate full liver assessment, variceal screening, and imaging
- kPa between 8–12.5 with elevated liver enzymes — significant liver fibrosis with active inflammation; the underlying cause needs identifying and treating now
- CAP above 290 alongside kPa above 8 — severe hepatic steatosis with moderate-significant fibrosis; NASH with active progression
- kPa higher than your last reading even if still “moderate” — upward trend needs a cause explanation, not just a note in the chart
- IQR/M ratio above 30% — the result needs repeating before any clinical decision is based on it
Don’t wait if the number has been outside the normal FibroScan range and no one has given you a structured follow-up plan. Serial results with no interpretation are just an expanding collection of concerning numbers.
Conclusion
The normal FibroScan range — kPa below 6, CAP score below 238 — represents a liver with no significant scarring and no significant fat. Both values matter. Both are actionable. And both can move in either direction depending on what’s driving them and whether it’s being addressed.
A result outside the normal range isn’t a verdict. Liver fibrosis at early stages responds to treating the underlying cause. Hepatic steatosis reverses with sustained metabolic correction. Even at advanced fibrosis, treatment changes the trajectory meaningfully. The number tells you where the liver is right now — the plan is what determines where it goes from here.
Getting the number is step one. Understanding it is step two. Having a plan is what actually matters.
Your FibroScan Numbers Deserve a Proper Explanation — Not Just a Printout
A result outside the normal FibroScan range needs clinical context, not just a reference table. At Gastro Plus, FibroScan results are reviewed alongside blood work, history, and underlying diagnosis — so the numbers mean something specific to your situation, not just to the chart.
Dr. Vibhor Pareek and the Gastro Plus team offer:
- FibroScan in Gurgaon — liver stiffness measurement and CAP score assessment with same-session specialist interpretation
- Abnormal result workup — cause investigation, follow-up planning, and fibrosis staging beyond what the printout provides
- Serial FibroScan monitoring — tracking whether intervention is moving your numbers in the right direction
- Fatty liver specialist consultation — structured NAFLD and hepatic steatosis management with defined milestones
- Hepatitis B and C follow-up — FibroScan as part of viral hepatitis monitoring and treatment decision-making
👉 Book a Consultation at Gastro Plus
Frequently Asked Questions
Q1. What is a normal FibroScan liver stiffness?
A liver stiffness measurement below 6 kPa is considered within the normal FibroScan range — this places you at F0–F1, meaning no significant liver fibrosis is present. Key caveats:
- This cutoff applies to NAFLD-context results; Hepatitis B and C use slightly different disease-specific thresholds
- A single reading just above 6 kPa with an IQR/M ratio above 30% should be repeated before any clinical decision is made on it
Q2. What is CAP 310 on a FibroScan?
A CAP score of 310 dB/m sits firmly in S3 — severe hepatic steatosis — meaning more than two-thirds of liver cells are estimated to contain fat. On its own, 310 is a significant finding but not a crisis indicator; what matters most is the liver stiffness kPa reading sitting alongside it:
- CAP 310 + kPa below 6: severe fat, no fibrosis — fully recoverable with sustained lifestyle intervention
- CAP 310 + kPa above 10: severe fat with significant fibrosis — needs specialist-directed management urgently
Q3. Can FibroScan results be wrong?
They can be artificially elevated by specific factors — eating within 2 hours, active liver inflammation from any cause, right heart failure, or high scan variability (IQR/M above 30%). These don’t make the test unreliable in general; they make specific readings in non-ideal conditions worth repeating. A technically valid FibroScan — fasted patient, stable enzymes, IQR/M below 30% — has approximately 85–90% accuracy for fibrosis staging.
Q4. How quickly can FibroScan results improve?
The CAP score improves fastest — measurable reduction in hepatic steatosis can show up on a repeat scan within 3–6 months of sustained dietary change and weight loss. Liver stiffness (kPa) changes more slowly — fibrosis regression typically shows on FibroScan at 12-month follow-up or later, after the underlying cause has been treated consistently. Expect the fat number to move before the scar number does.
Q5. Does age affect the normal FibroScan range?
Slightly. Older adults tend to have marginally higher baseline liver stiffness independent of disease, and the published reference ranges were developed primarily from middle-aged adult populations. In clinical practice, the same thresholds are applied across adult age groups, but a gastroenterologist factors age and comorbidities into the interpretation rather than reading the number against the reference table alone.
Q6. Should I fast before a FibroScan?
Yes — most guidelines recommend a 2-hour fast before the scan. Eating raises portal blood flow and temporarily increases liver stiffness, which can produce a falsely elevated kPa reading unrelated to actual liver fibrosis. Food also affects CAP score reliability. Water is generally fine. Avoiding alcohol for at least 24 hours before the scan is also recommended — alcohol causes acute liver inflammation that transiently stiffens the liver independently of chronic disease.
