Volume composteira doméstica
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
This calculator estimates the ideal volume for a home compost bin based on the amount of organic waste generated per day and the desired composting time. The calculation assumes that the bin volume must be sufficient to hold all waste during the decomposition period, preventing overflow and ensuring an efficient process.
The formula is simple: volume (in liters) equals daily waste (in kg) multiplied by composting time (in days). This assumes a waste density of approximately 1 kg/liter, which is a reasonable approximation for food scraps and light pruning. The result is a minimum recommended capacity, considering that material compacts over time.
Use this tool when planning to set up a home compost bin, especially if you want to size it correctly to avoid odors and ease handling. For example, a family generating 0.5 kg of waste per day aiming for a 30-day cycle needs a bin of at least 15 liters. Remember that having a slightly larger volume is ideal to allow aeration and mixing.
Important cautions: the calculator does not account for waste type (wetter or drier), composting efficiency, or volume loss due to decomposition. Therefore, it is advisable to add a safety margin of 20 to 30% to the result. Also, bins with multiple compartments may require separate calculations for each stage of the process.
Frequently asked questions
What is the difference between usable volume and total volume of the compost bin?
Usable volume is the capacity effectively occupied by waste, usually less than total, because space is needed for aeration and turning. The calculator gives the minimum usable volume.
Can I use any type of organic waste in the compost bin?
Suitable waste includes fruit and vegetable scraps, eggshells, and coffee grounds. Avoid meat, dairy, and oily foods as they attract pests and cause bad odors.
How does composting time affect the required volume?
Longer time means more volume needed to accumulate waste. Short cycles (20-30 days) require less space but need more aeration and turning.
Does the calculator consider volume loss during composting?
No. The final compost volume is about 30-50% of the initial. Therefore, it is recommended to add a safety margin to the result.
Do I need a compost bin with multiple compartments?
Separate compartments help manage different stages (fresh waste, decomposing, finished compost). The calculator sizes each compartment individually if you split the load.