How Long Does It Take Ice Cubes to Freeze?
It's the night before a party and you're filling ice trays. How long until they're ready? Here are realistic freezing times, and why a freezer alone rarely makes enough ice for an event.
The short answer
In a typical home freezer set to −18°C, standard ice cube trays take about 3 to 4 hours to freeze solid. Small cubes can be ready in around 2 hours; large cubes and sphere moulds often need 6 to 8 hours or more, and big blocks can take a day.
| Ice size | Typical freezing time at −18°C |
|---|---|
| Small cubes / mini trays | about 2 hours |
| Standard ice cube tray | 3–4 hours |
| Large cubes (5 cm) | 6–8 hours |
| Ice spheres | 6–10 hours |
| Ice blocks / tubs | 12–24 hours or more |
What affects freezing time
- Freezer temperature – a colder setting freezes faster; check yours is at −18°C or below.
- Size of each cube – bigger cubes take much longer because the centre freezes last.
- Tray material – metal trays conduct cold faster than plastic or silicone.
- How full the freezer is – a crowded freezer with warm food going in freezes slowly.
- Air flow – trays packed under other items or against warm walls freeze unevenly.
How to freeze ice faster
- Turn the freezer to its coldest setting a few hours before.
- Use metal trays or smaller cube moulds.
- Place trays flat with space around them, away from the door.
- Start with cold tap water. (The idea that hot water freezes faster is unreliable in a home freezer.)
- Once frozen, empty the trays into a freezer bag and refill them straight away.
How much ice can a home freezer make?
A standard tray holds around 300–400 g of ice. Even refilling two trays every 4 hours, you would make only 3–5 kg a day. A party for 30 people typically needs around 25–30 kg of ice, so the numbers rarely add up. Our guide how much ice do I need for a party explains the maths.
Need a lot of ice? Get it delivered
- £10 per 12 kg bag: cube ice, crushed ice or 6 × 2 kg bags.
- Free delivery across London from 5 bags.
- Order by 5pm for next-day delivery, Monday to Saturday, in a morning or afternoon slot.
- Order ice online in a couple of minutes.
Frequently asked questions
How long does it take ice cubes to freeze? About 3 to 4 hours in a standard tray in a home freezer at −18°C. Small cubes can take around 2 hours; large cubes 6–8 hours.
Does hot water freeze faster than cold water? Not reliably in a home freezer. Start with cold tap water for consistent results.
How long do large ice cubes take to freeze? Large 5 cm cubes usually take 6 to 8 hours, and ice spheres can take up to 10 hours.
How can I get a lot of ice quickly? Buy bagged ice. A 12 kg bag holds as much ice as dozens of trays.