Use the Product Dry-Weight chart below to quickly calculate a patient’s urine output. Weigh the wet disposable brief, underwear or pad on a standard scale, hanging spring scale or wheelchair/standing scale.
- Determine product and size, and use that information to find the product’s dry weight on the chart below
- Zero your scale to recalibrate and weigh the wet product
- Subtract the dry weight from the wet weight to calculate urine output
The weight in grams also equals the volume in milliliters (ml).
The Formula to Calculate Urine Output from a Diaper
The urine output formula is the wet weight of the diaper minus the dry weight of the diaper. The difference weight in grams is also the Volume mL/cc of urine output.
Adult Diaper Dry-Weight Chart
| Item# | Product Description | Dry Weight in Grams |
|---|---|---|
| 2311 | Tranquility® SmartCore® Brief – Small | 80 |
| 2312 | Tranquility® SmartCore® Brief – Medium | 99 |
| 2313 | Tranquility® SmartCore® Brief – Large | 120 |
| 2314 | Tranquility® SmartCore® Brief – X-Large | 134 |
| 2315 | Tranquility® SmartCore® Brief – 2XL | 150 |
| 2190 | Tranquility® Bariatric Brief – 3XL | 168 |
| 2192 | Tranquility® Air-Plus® HI-Rise™ Bariatric Brief – 3XL | 180 |
| 2195 | Tranquility® Air-Plus® HI-Rise™ Bariatric Brief – 4XL-5XL | 165 |
| 2113 | Tranquility® Premium OverNight™ Underwear – X-Small | 59 |
| 2114 | Tranquility® Premium OverNight™ Underwear – Small | 62 |
| 2115 | Tranquility® Premium OverNight™ Underwear – Medium | 87 |
| 2116 | Tranquility® Premium OverNight™ Underwear – Large | 87 |
| 2117 | Tranquility® Premium OverNight™ Underwear – X-Large | 96 |
| 2118 | Tranquility® Premium OverNight™ Underwear – 2XL | 98 |
| 2119 | Tranquility® Premium OverNight™ Underwear – 3XL | 101 |
| 2604 | Tranquility Essential® Underwear – Heavy Small/Youth X-Large | 51 |
| 2605 | Tranquility Essential® Underwear – Heavy Medium | 70 |
| 2606 | Tranquility Essential® Underwear – Heavy Large | 70 |
| 2607 | Tranquility Essential® Underwear – Heavy X-Large | 76 |
| 2608 | Tranquility Essential® Underwear – Heavy 2XL | 78 |
| 2609 | Tranquility Essential® Underwear – Heavy 3XL | 83 |
| 3096 | Tranquility® TopLiner® Booster Contour Pad | 40 |
| 3097 | Tranquility® TopLiner® Booster Contour Pad – Super-Plus | 86 |
| 2710 | Tranquility® Air-Plus® Underpad 30 x 36 | 120 |
How Do You Measure Urine Output?
Urine output can be measured using any of these three methods.
- Manual Measurement of Urine Output: This is done by collecting urine in devices such as bedpans, commodes or other types of collection containers and then pouring into a measuring container and noting the volume in mL (milliliters) at eye level.
- Urinary Catheter Measurements: Measuring urine output from a catheter is done by reading the volume of output directly from markings on a catheter’s collection bag or measurement chamber.
- 24-Hour Collection of Urine Output: This method involves collecting and measuring every single urine sample produced over a full day (24-hour period) in a specialized urine collection container. The 24-hour method is considered a strong method because it offers a comprehensive snapshot of the person’s kidney and bladder functions throughout an entire day.