How to Calculate Urine Output From Diaper Weight in Adults

August 3, 2022

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.

  1. Determine product and size, find product dry-weight on chart
  2. Zero scale to recalibrate and weigh wet product
  3. Subtract dry weight from 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 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® HI-Rise™ Bariatric Brief – 3XL 180
2195 Tranquility® AIR-Plus™ Bariatric Brief – 4XL 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
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/Bariatric 78
3096 Tranquility 40 ® TopLiner® Booster Contour Pad 40
3097 Tranquility® TopLiner® Booster Contour Pad – Super-Plus 86
2709 Tranquility® AIR-Plus™ Underpad 23 x 36 82
2710 Tranquility® AIR-Plus™ Underpad 30 x 36 120