Urine Colour Hydration Chart
The validated 8-shade Armstrong scale as an interactive reference — your cheapest hydration lab test.
Armstrong validated colour against plasma osmolality and urine specific gravity — shades 1–3 track euhydration well, making this the most cost-effective hydration test in sports science. Caveats: B-vitamins fluoresce neon yellow, beetroot turns it pink, and the first morning sample always reads darker. Persistent dark urine despite drinking deserves a doctor.
Formula
For general information only — not medical advice, a diagnosis or a treatment plan. Consult a qualified healthcare professional before making health, diet, medication or exercise decisions.
The validated 8-shade Armstrong scale as an interactive reference — your cheapest hydration lab test. The Urine Colour Hydration Chart is a free, private urine color chart tool — every result computes instantly in your browser with no sign-up and no data upload.
About Urine Colour Hydration Chart
Armstrong validated colour against plasma osmolality and urine specific gravity — shades 1–3 track euhydration well, making this the most cost-effective hydration test in sports science. It applies Armstrong 8-point urine colour scale (validated vs hydration markers). Use the Urine Colour Hydration Chart 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 Urine Colour Hydration Chart
- 1Enter your details in the Urine Colour Hydration Chart 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 Urine Colour Hydration Chart?
- ✓Instant urine color chart 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 (Armstrong LE et al., Int J Sport Nutr 1994 — urinary indices of hydration)
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the Urine Colour Hydration Chart work?+
Armstrong validated colour against plasma osmolality and urine specific gravity — shades 1–3 track euhydration well, making this the most cost-effective hydration test in sports science. The calculation uses the formula: Armstrong 8-point urine colour scale (validated vs hydration markers). Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the Urine Colour Hydration Chart accurate, and what is it based on?+
The method is traceable to authoritative sources: Armstrong LE et al., Int J Sport Nutr 1994 — urinary indices of hydration. Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the Urine Colour Hydration Chart 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 tool is for general information only and is not medical advice. Always consult a qualified healthcare professional before making health decisions.
What can I use the Urine Colour Hydration Chart for?+
It's commonly used for urine color chart, hydration urine, pee color meaning. The validated 8-shade Armstrong scale as an interactive reference — your cheapest hydration lab test.
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