Dry Ice Shipping Calculator
Estimate dry ice for overnight parcels, long transit, and cold-chain shipments with realistic packing loss.
| Payload type | Base factor | Best pack | Note |
|---|---|---|---|
| Frozen food | 0.92x | Foam | Starts cold |
| Seafood | 1.05x | Shipper | Tight control |
| Lab samples | 0.72x | Foam | Pre-chilled |
| Medical items | 0.80x | Hard | Higher buffer |
| Flowers | 1.15x | Tote | Short transit |
| Dessert | 0.95x | Shipper | Fragile hold |
| Raw meat | 1.00x | Foam | Pack dense |
| Mixed cold | 1.00x | Shipper | General load |
| Lane | Hold goal | Risk | Planning note |
|---|---|---|---|
| Local | 6-12 hr | Low | Fast handoff |
| Overnight | 18-24 hr | Med | Most common |
| Two-day | 36-48 hr | High | Use more reserve |
| Air cargo | 12-18 hr | Med | Strict venting |
| Cross-dock | 24-36 hr | High | More stops |
| Warm dock | 24 hr | High | Buffer hard |
| Cold dock | 24 hr | Low | Best case |
| Courier loop | 8-10 hr | Low | Short chain |
| Shipper | Factor | Strength | Best use |
|---|---|---|---|
| Foam box | 0.84x | Strong | Short runs |
| Corrugated | 1.00x | Balanced | Overnight |
| Hard cooler | 0.76x | Very strong | Long trips |
| Thin tote | 1.20x | Poor | Backup only |
| Foil liner | 0.92x | Light | Extra wrap |
| Double wall | 0.88x | Better | Food lanes |
| Vac liner | 0.70x | Best | Cold chain |
| Rigid tote | 1.08x | Fair | Short hold |
| Hold time | Reserve | Openings | Suggestion |
|---|---|---|---|
| 6 hr | 10% | 0-1 | Small load |
| 12 hr | 15% | 0-2 | Typical box |
| 24 hr | 20% | 0-2 | Overnight ship |
| 36 hr | 25% | 0-3 | Add buffer |
| 48 hr | 30% | 0-4 | Heavy reserve |
| 72 hr | 40% | 0-4 | Use hard box |
| Warm day | +5% | Any | Round up |
| Hot day | +10% | Any | Pack extra |
Dry ice is the solid form of carbon dioxide. It is unlike usual ice because it does not melt. Instead, it sublimes, so it passes directly from solid to gas without becoming liquid, even under normal atmospheric pressure It has no color, does not smell, and certainly does not burn.
The surface temperature is around minus 78 degrees Celsius, which is extremely cold. It consists only of carbon dioxide, so there is no water. That is the main difference from average ice: when that melts, water stays, but dry ice simply disappears as gas in the air.
Dry Ice: What It Is and How to Use It
It exists mainly to keep things cold. You use it in shipping operations, especially for perishable products that must stay frozen, for example frozen foods, meat, seafood and ice during the journey. The advantage is that while it sublimes into gas, there are no risks of water damgae.
The foods stay frozen and protected against decay during the whole trip.
For camping journeys dry ice is genuinely useful when you want to keep foods frozen and drinks cold for several days. I noticed that during warm days you need around five pounds for one day. On the third day, if you still want to have frozen ice, plan around fifteen pounds.
A good method that I used is to lay the dry ice directly on the bottom of the cooler, with a cardboard plate below, then stack the meat and cheese on top. Wrapping it in newspapers works well. That keeps anyone from accidentally touching it with bare hands.
Food industries use dry ice for many reasons. It works in soda fountains, transportation of foods and production of ground meat. You crush it and mix it in the meat to keep it cold.
Also for carbonating drinks it is traditional. Root beer for example: you take basic syrup and add bits of dry ice to get the carbonation.
Dry ice helps to flash-freeze foods, carbonate drinks and make ice. For ice around three pounds above it is enough. Usual ice melts at 0 degrees Celsius, which is too warm for ice that must stay between minus 18 and minus 10 degrees.
During a power outage, if you put dry ice in a home freezer, put it below and use newspapers as insulation on the glass shelves so that they do not crack because of the cold shock. Make sure all liquids are well closed, otherwise they will absorb the carbon dioxide and become carbonated. A big freezer can consume forty to fifty pounds per day.
Do not put it in a regular freezer or in a sealed bucket, the sublimation is five to ten pounds every twenty-four hours. Direct touch causes frostbite, and swallowing it is dangerous. You find it at grocery stores for around two dollars perpound.