Calculadora de Tamanho de Cinto
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
cinto = cintura + 20 cm
About this calculator
This belt size calculator helps you find the ideal length for buying a belt. The rule of thumb is to add 20 centimeters to your waist measurement. This ensures the belt has enough slack to be worn comfortably, passing through belt loops and allowing adjustments. The result is the belt size, measured from buckle to middle hole.
How it works: measure your waist at the point where you usually wear the belt, typically at navel height. Use a flexible tape measure. Enter the value in centimeters into the calculator. The tool applies the simple formula: waist + 20 cm. For example, if your waist is 80 cm, the recommended belt size is 100 cm. This method is widely used in stores and size guides.
When to use: when buying a new belt online or in a physical store, especially if you don't have a reference belt. Also useful if your measurements have changed or if you are buying a gift. The rule works for men's and women's belts, made of leather, canvas, or other materials. Avoid buying belts that are too long with excessive leftover or too short that won't close.
Cautions: the added 20 cm is an average; some prefer 15 cm for a tighter belt or 25 cm for more slack. Check that the buckle and holes allow fine adjustment. Belts from different brands may vary, so always check the manufacturer's size chart. The calculator provides an initial guideline, not an absolute guarantee.
Frequently asked questions
How do I measure my waist correctly?
Use a flexible tape measure and measure around your waist at navel height, without pulling too tight. Keep the tape straight and parallel to the floor.
What if my measurement falls between two sizes?
Round up. For example, if your waist is 82 cm, the ideal size is 102 cm (82+20). If the belt only comes in 100 or 105, choose 105.
Does this rule work for all belt types?
It works for most straight belts. Elastic belts or those with special buckles may have different rules. Check the manufacturer's instructions.
Why add 20 cm and not another value?
20 cm is an average that ensures the belt passes through belt loops and has length for adjustment. Slimmer people may need less, and larger people may need more.
Can I use the calculator for children's belts?
Yes, but for children the addition may be smaller (15 cm) due to shorter torso. Adjust as needed.