Roupa/semana
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The 'Clothes/week' calculator estimates the amount of laundry an adult washes weekly, based on an average of 7 items. It helps plan washing routines, calculate cleaning product costs, or assess water/electricity usage. The tool assumes a typical weekly washing routine but may vary depending on fabric type, local climate, and clothing usage frequency.
The calculation uses a simple formula: multiply the number of items by weekly washing days and adjust by categories (underwear, t-shirts, pants). For example, 7 weekly items equal 700 grams of dirty laundry, considering 100g per item. It also accounts for the average capacity of washing machines or manual basins.
Use this tool to: determine detergent quantities, schedule family laundry times, or compare energy efficiency. It's ideal for optimizing time and reducing waste. However, in households with more people or thick fabrics (like jeans), the volume may double.
Considerations: the result is an approximation. Factors like hot weather (which dirties clothes faster), intense physical activities, or specific clothing (like uniforms) alter the average. Adjust according to your reality, especially if washing daily or in larger batches.
Frequently asked questions
Does the calculator consider all types of clothing?
Yes, it includes underwear, t-shirts, pants, and common items. Bulky items like blankets should be adjusted manually.
What if I wash clothes more frequently?
Adjust the weekly items count. For example, washing 14 items over two weeks equals 7 items/week.
Is the result accurate for my case?
It's an average based on 7 items. Modify the input if you wash fewer or more clothes.
Can I use it to calculate detergent dosage?
Yes. The tool provides total laundry weight, which is used to estimate recommended cleaning product amounts.