ALT ukat/L To IU/L Converter
Convert alanine aminotransferase ALT between microkatal per litre and IU/L or U/L for laboratory reports and method notes.
Report Value
Converted ALT Result
0.6 ukat/L multiplied by 60 equals 36.0 IU/L.
This page converts ALT enzyme activity units only. It does not decide liver health, severity, cause or treatment.
ALT Unit Conversion In One Line
ALT in ukat/L converts to IU/L by multiplying by 60. ALT in IU/L or U/L converts to ukat/L by dividing by 60. For example, 0.6 ukat/L is 36 IU/L, and 45 IU/L is 0.75 ukat/L. The same factor applies because one microkatal is one micromole per second, while one enzyme unit is one micromole per minute.
ALT stands for alanine aminotransferase. It may appear on liver blood test reports, clinical letters, research papers and health apps. This converter is only for the reporting unit. It does not decide whether ALT is expected, serious, caused by liver disease, caused by exercise, linked to medicine, or related to another test.
Why ALT Needs The Unit Beside The Number
A number such as 36 means very different things depending on the unit. ALT 36 IU/L and ALT 36 ukat/L are not close; the second would be a unit error if copied from an IU/L report. Keep ALT, value and unit together when sending a result to a clinician, insurer, research form or personal health app.
Reference intervals should travel with the same report. Do not convert a result and then compare it with a range from a different lab website. ALT methods, patient groups and reporting policies vary. The range fields in the tool are provided so you can convert the interval printed on the same report, not to create a universal interval.
Formula And Reverse Check
ALT IU/L = ALT ukat/L x 60
ALT U/L = ALT ukat/L x 60
ALT ukat/L = ALT IU/L / 60
ALT nkat/L = ALT ukat/L x 1000
The reverse check is included so transcription errors are easier to spot. If 0.75 ukat/L becomes 45 IU/L, then 45 divided by 60 should return 0.75. If it does not, the wrong direction or wrong factor has probably been used.
Worked ALT Examples
Example 1: A report gives ALT as 0.50 ukat/L. Multiply by 60. The result is 30 IU/L or 30 U/L. A note can be written as “ALT 0.50 ukat/L, equivalent to 30 IU/L”.
Example 2: A health app asks for ALT in ukat/L, but the laboratory report says 42 U/L. Divide by 60. The result is 0.70 ukat/L. Enter the converted value only if the app clearly asks for ukat/L.
Example 3: A paper lists ALT values in ukat/L and a UK clinic letter uses U/L. Converting both values into the same unit allows the numbers to be compared arithmetically, but method and patient context still matter.
ALT Conversion Table
| ALT ukat/L | ALT IU/L Or U/L | Useful Reverse |
|---|---|---|
| 0.10 ukat/L | 6 IU/L | 6 / 60 = 0.10 ukat/L |
| 0.25 ukat/L | 15 IU/L | 15 / 60 = 0.25 ukat/L |
| 0.50 ukat/L | 30 IU/L | 30 / 60 = 0.50 ukat/L |
| 0.75 ukat/L | 45 IU/L | 45 / 60 = 0.75 ukat/L |
| 1.00 ukat/L | 60 IU/L | 60 / 60 = 1.00 ukat/L |
| 1.50 ukat/L | 90 IU/L | 90 / 60 = 1.50 ukat/L |
| 2.00 ukat/L | 120 IU/L | 120 / 60 = 2.00 ukat/L |
How To Use The Converted ALT Value
For A Health App
Check the unit requested by the app before typing. If the app asks for U/L, use the IU/L result. If it asks for ukat/L, use the ukat/L result and keep a note of the original report unit.
For A Clinical Message
Include the original lab wording where possible, such as “ALT 42 U/L”. If adding a conversion, mark it as converted so the reader knows which value came from the lab.
Mistakes To Avoid
- Using 60 in the wrong direction: ukat/L to IU/L multiplies, IU/L to ukat/L divides.
- Typing U/L into a field that expects ukat/L without converting.
- Converting ALT but forgetting to convert the reference interval printed beside it.
- Using an ALT unit conversion to judge liver disease, medicine safety or urgency.
- Comparing results from different labs without checking method and clinical context.
When To Ask A Clinician
Ask for clinical advice if ALT is flagged on a report, appears with other flagged liver tests, follows new symptoms, follows a medicine change, or is being checked for a known condition. Unit conversion can help you quote the number accurately, but it does not explain cause, risk, trend or next steps.
FAQ
How do I convert ALT ukat/L to IU/L?
Multiply ALT in ukat/L by 60. For example, 0.75 ukat/L equals 45 IU/L.
How do I convert ALT IU/L to ukat/L?
Divide ALT in IU/L or U/L by 60. For example, 42 U/L equals 0.70 ukat/L.
Is ALT U/L the same as ALT IU/L?
For this enzyme activity display, U/L and IU/L are commonly used as equivalent unit labels. Use the unit printed on the report when copying.
Can this converter tell me if ALT is raised?
No. It converts units only. Use the laboratory reference interval and speak to a clinician about medical meaning.
Does the factor differ between ALT and ALP?
The unit factor from ukat/L to IU/L is still 60. The clinical meaning differs because ALT and ALP are different enzymes.
What is nkat/L?
nkat/L means nanokatal per litre. It is 1,000 times the ukat/L value and is shown only as an extra unit display.
Sources
- Bureau International des Poids et Mesures. (1999). Resolution 12 of the 21st CGPM: Special name for the SI derived unit mole per second, the katal, for the expression of catalytic activity. BIPM. https://www.bipm.org/en/committees/cg/cgpm/21-1999/resolution-12
- National Institute of Standards and Technology. (2008). Guide for the Use of the International System of Units (SI) (NIST Special Publication 811). NIST. https://www.nist.gov/pml/special-publication-811
- Unified Code for Units of Measure. (2024). UCUM specification. UCUM. https://ucum.org/ucum
- International Union of Pure and Applied Chemistry. (2001). Unit “katal” for catalytic activity. Pure and Applied Chemistry, 73(6), 927-931. https://publications.iupac.org/publications/pac/2001/pdf/7306×0927.pdf