Liquid calculator: how much can you take on a plane?
Convert oz, ml and fl oz, then add your actual toiletry bottles to see if they fit the 100ml hand-luggage rule and the 1-litre quart bag.
Containers up to 100ml (3.4 fl oz), all inside a single 1-litre clear plastic bag. One bag per passenger.
Rule basis: Standard TSA / UK DfT / EU rule. CT-scanner airports may allow up to 2L per container, but never plan around that for both ends of a trip.
What to do: Decant to 100ml travel bottles, buy duty-free post-security, or check the bottle.
Liquid Limits is a travel planning tool, not an official aviation source. Always confirm with the airport before you travel.
Unit converter
ml ↔ US fl oz. The label on your bottle decides — labels in ounces are usually US fluid ounces, not weight ounces.
Quart bag fill
Add the bottles in your wash bag. Each must be ≤ 100ml, and the total must fit in 1 litre (the 'quart bag').
- Toothpaste — 75 ml
- Moisturiser — 50 ml
- Sunscreen — 100 ml
- Perfume — 50 ml
Common conversions
| ml | US fl oz | Cabin? |
|---|---|---|
| 30 ml | 1.01 fl oz | Fine |
| 50 ml | 1.69 fl oz | Fine |
| 75 ml | 2.54 fl oz | Fine |
| 100 ml | 3.38 fl oz | Fine |
| 150 ml | 5.07 fl oz | Hold luggage |
| 200 ml | 6.76 fl oz | Hold luggage |
| 250 ml | 8.45 fl oz | Hold luggage |
| 500 ml | 16.91 fl oz | Hold luggage |
| 1000 ml | 33.81 fl oz | Hold luggage |
FAQs
How much liquid can I take on a plane?
Containers of 100ml (3.4 fl oz) or smaller, all fitting inside a single 1-litre (1 quart) clear plastic bag. One bag per passenger. A handful of airports with CT scanners (Gatwick, Edinburgh, Bristol, Amsterdam, parts of JFK) allow up to 2 litres per container — never plan around that for both ends of a trip.
How many ounces is 100ml?
100ml is 3.4 US fluid ounces. TSA, UK and EU airports all use the same limit; the labels differ but the rule is the same.
How many fluid ounces can I take on a plane?
Each container can hold up to 3.4 fl oz (100ml). Total liquids must fit in a single quart-sized (1 litre) clear bag.
Does a half-empty 150ml bottle pass security?
No. Security goes by the container's labelled size, not how full it is. A 150ml bottle is rejected even with 30ml inside.
What counts as a liquid?
Anything pourable, spreadable, sprayable or pasty: gels, creams, balms, toothpaste, deodorant gel, lip gloss, mascara, jam, yogurt, soft cheese, hummus, peanut butter.