24-Hour Fluid Balance Calculator
Intake vs output the way hospital charts do it — with insensible losses, the line everyone forgets.
The ~800 ml that evaporates through skin and breath never reaches a measuring jug — fever adds ~13% per °C, and hot dry air more. Hospitals chart this hourly for cardiac and renal patients because a litre of silent positive balance is a kilogram of fluid. At home it's perspective: balance swings ±500 ml day to day and the body buffers it gracefully.
Formula
Reference aid for healthcare professionals only. Every result must be independently verified before clinical use. Never use this tool for self-medication or to replace clinical judgement.
Intake vs output the way hospital charts do it — with insensible losses, the line everyone forgets. The 24-Hour Fluid Balance Calculator is a free, private fluid balance tool — every result computes instantly in your browser with no sign-up and no data upload.
About 24-Hour Fluid Balance Calculator
The ~800 ml that evaporates through skin and breath never reaches a measuring jug — fever adds ~13% per °C, and hot dry air more. It applies balance = intake (drink+food) − urine − other − ~800 ml insensible (skin+lungs). Use the 24-Hour Fluid Balance Calculator to get an instant, clearly-explained result with the working shown step by step — free, private and with the source method cited.
How to use 24-Hour Fluid Balance Calculator
- 1Enter your details in the 24-Hour Fluid Balance Calculator input fields above.
- 2The result updates instantly with the working and reference bands shown.
- 3Adjust any value to explore how it changes the outcome — it's free and unlimited.
Why use 24-Hour Fluid Balance Calculator?
- ✓Instant fluid balance result that recomputes as you type — no waiting, no page reloads
- ✓100% client-side: your health data never leaves your browser
- ✓Shows the actual formula and your numbers substituted in, so you can see exactly how the result is reached
- ✓Based on published, citable sources (Standard clinical fluid-balance methodology (e.g., NICE CG174))
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the 24-Hour Fluid Balance Calculator work?+
The ~800 ml that evaporates through skin and breath never reaches a measuring jug — fever adds ~13% per °C, and hot dry air more. The calculation uses the formula: balance = intake (drink+food) − urine − other − ~800 ml insensible (skin+lungs). Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the 24-Hour Fluid Balance Calculator accurate, and what is it based on?+
The method is traceable to authoritative sources: Standard clinical fluid-balance methodology (e.g., NICE CG174). Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the 24-Hour Fluid Balance Calculator free and private?+
Yes. It's completely free with no sign-up, and all computation happens locally in your browser, so none of your health data ever leaves your device.
Can I use this for medical decisions?+
This is a reference aid for healthcare professionals and must be independently verified. It is not for self-diagnosis or self-medication.
What can I use the 24-Hour Fluid Balance Calculator for?+
It's commonly used for fluid balance, intake output chart, fluid balance calculation. Intake vs output the way hospital charts do it — with insensible losses, the line everyone forgets.
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