Creatinine converter

Convert creatinine between the UK units on your lab report and the US units used on some websites.

Your details

80 µmol/L is

0.90 mg/dL

the same result in the other unit

In µmol/L (UK labs)80.0
In mg/dL (US and many apps)0.90
In mmol/L (a few labs)0.080
The summg/dL × 88.4 = µmol/L; µmol/L ÷ 1,000 = mmol/L

Creatinine on its own says little, because it depends on your muscle, age and sex as well as your kidneys. That is why UK labs turn it into an eGFR, and the kidney function calculator can show yours.

If a result worries you, ask your GP surgery or practice nurse to talk it through. Call 111 if you feel unwell and are not sure what to do.

Two results

Has my creatinine gone up?

Add an earlier result in the same unit and the calculator shows the change in per cent. NICE NG203 treats a rise of more than 20% as a meaningful change when eGFR is above 90, so it is usually rechecked rather than ignored. Smaller ups and downs of about 5% are normal variation between tests.

The working

80 µmol/L in US units

UK labs report micromoles per litre. Divide by 88.4 for milligrams per decilitre: 80 ÷ 88.4 = 0.90 mg/dL. Going the other way, 1.2 mg/dL x 88.4 = 106 µmol/L.

Quick table

Common values side by side

µmol/L	mg/dL
50	0.57
70	0.79
90	1.02
110	1.24
150	1.70
200	2.26

Reading it

Why creatinine needs context

Creatinine comes from muscle, so a tall, muscly man and a small older woman can have very different results with equally healthy kidneys. That is why labs turn it into eGFR, using age and sex, and why a change over time often says more than one number.

Read with care

What this cannot tell you

Tell you kidney functionUse the eGFR calculator for that.
Give a normal rangeRanges vary by lab, age, sex and muscle.
Convert cystatin CThat is a different test with its own units.

Questions

Common questions

How do I convert creatinine from umol/L to mg/dL?

Divide by 88.4. So 100 µmol/L is 1.13 mg/dL.

What creatinine level is normal?

It depends on the lab, your muscle, age and sex, which is why your eGFR is the better guide.

Do supplements or muscle change my result?

They can. NICE notes eGFR is less reliable in people with a lot of muscle or who use protein supplements, so tell your GP if that is you.

Sources

Last checked 21 October 2026. Spotted something wrong? Tell us and we will fix it.

Talk your results through

If a result worries you, book a chat with your GP or practice nurse, or ask a pharmacist. Call NHS 111 if you feel unwell and are not sure what to do, and 999 in an emergency.