Percent Dehydration Calculator
Calculate fluid loss percentage to assess clinical dehydration status.
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Formula
Determines the level of fluid depletion relative to baseline weight.
Worked Example
Assessing Percent Dehydration
- Mild: < 5% loss (thirsty, dry mouth)
- Moderate: 5-10% loss (decreased urine, lethargy, sunken eyes)
- Severe: > 10% loss (shock, rapid pulse, medical emergency)
- Formula: % Dehydration = [(Baseline Weight - Current Weight) / Baseline Weight] × 100
Dehydration over 5% in children or 10% in adults often requires clinical intervention or intravenous fluids. Seek medical help for severe symptoms.
You can also calculate changes using our IV Drip Rate Calculator or Water Intake Calculator.
Frequently Asked Questions
What is a dangerous level of dehydration?
Any loss greater than 10% of body weight is considered severe and potentially life-threatening, requiring immediate medical attention.
Is weight loss from dehydration permanent?
No. This weight loss is purely fluid and will be regained as the body is rehydrated.
Why is this used in pediatrics?
Children have a higher surface-area-to-volume ratio and get dehydrated much faster than adults, making percentage-based tracking vital for their safety.
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