Calculator
What the Urine Output Calculator does
Urine Output Calculator: calculates ml/kg/hour and Status from Urine Volume, Collection Hours and Weight. Example: urine volume 800 ml, collection hours 8 and weight 70 kg gives ml/kg/hour 1.43.
Supply Urine Volume, Collection Hours and Weight and you get ml/kg/hour and Status back. You can nudge a single number and watch the effect straight away.
Most people who open the Urine Output Calculator are people tracking a goal. Context matters more than the number itself. Age, build and activity all shift it.
Nothing leaves the tab. You can watch your browser network panel while you use it and see for yourself.
The rest of this page documents each field, the method, and a worked example built from the values the urine output calculator loads by default.
What do the Urine Output Calculator fields mean?
The Urine Output Calculator uses 3 inputs. You do not have to fill everything in before seeing an answer; the starting values already produce one.
| Field | What to enter | Default |
|---|---|---|
| Urine Volume | measured in ml; accepts 0 to 10000 | 800 |
| Collection Hours | accepts 1 to 24 | 8 |
| Weight | measured in kg; accepts 20 to 200 | 70 |
How does the Urine Output Calculator work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same calculation.
Validation is deliberately strict: silently coercing a bad value is how wrong numbers get trusted.
Worked example
These are the values the Urine Output Calculator loads by default, and the result it produces from them. This is the worked example the page starts from, reproduced here so you can check the arithmetic.
| Urine Volume | 800 ml |
|---|---|
| Collection Hours | 8 |
| Weight | 70 kg |
| ml/kg/hour | 1.43 |
|---|---|
| Status | Typical |
| What this means | Output ≈ 1.43 ml/kg/h (Typical). Clinical context matters. |
How to use it
- Put Urine Volume in ml (0 to 10000).
- Key in Collection Hours (1 to 24).
- Fill in Weight in kg (20 to 200).
- You will see the result move while you are still editing: that is expected.
- The results panel then shows ml/kg/hour, Status and What this means.
- Copy Link puts the current inputs in the URL, so bookmarking it brings the same numbers back.
What this tool does not do
- This is a screening estimate, not a diagnosis.
- Body composition, ethnicity and age all shift what a "normal" result means for an individual.
- The output is a number, not a judgement. Deciding what it means is still your job.
- Read the field labels once before trusting the answer; they specify the expected unit.
Frequently asked questions
Enter Urine Volume in ml and Weight in kg. Units are printed on the form itself. Match them and no manual conversion is needed.
Urine Volume accepts 0 to 10000 ml. Values outside that range are rejected with a message naming the field, rather than producing something that looks valid but is not.
With the values loaded when the page opens, ml/kg/hour comes out as 1.43. The figure is derived from the inputs above, so it updates whenever they do.
Not at all: the whole thing runs offline once the page has loaded, which tells you nothing is being sent.
No. There is no account, no usage cap and no trial period. The site is funded by advertising rather than by charging for the tools.
The number is exact; its meaning is approximate. Two people with identical results can be in genuinely different situations, which is why this is a screening tool rather than a diagnostic one.