Bag Calculator
Calculate the total volume and estimated weight capacity of a bag or luggage based on its dimensions.
Formula
Volume (L) = (L × W × H) ÷ 1000
- Volume is in litres (1 L = 1,000 cm³).
- Linear inches = (L + W + H) ÷ 2.54, used by airlines.
- Usable volume = total volume × fill factor.
50×30×20 cm bag at 70% fill
Inputs
- Length: 50 cm
- Width: 30 cm
- Height: 20 cm
- Fill Factor: 70 %
Volume = 50×30×20/1000 = 30 L. Usable at 70% = 21 L. Linear = (50+30+20)/2.54 ≈ 39.4 in.
Frequently asked questions
What are linear inches?
Linear inches is the sum of length + width + height in inches, used by airlines for carry-on limits (usually 45 in).
How many litres fits in typical carry-on?
Standard carry-on bags are 20–40 litres.
What fill factor should I use?
70–80% is practical for a packed bag with some flexibility.
Does this account for irregular shapes?
This assumes a rectangular bag. Oddly-shaped bags may have less usable volume.