How to Choose Gummy Mold Cavity Count from Piece Weight and Output
Choosing the right cavity count for your gummy mold is one of the most important decisions in setting up your production line. Get it right, and your molds
Kyler Yang · Founder5 min read
Introduction
Choosing the right cavity count for your gummy mold is one of the most important decisions in setting up your production line. Get it right, and your molds run efficiently alongside your depositor and cooling system. Get it wrong, and you'll either be bottlenecked by slow output or paying for equipment you don't need.
This guide walks you through the calculation — from target piece weight and daily output to the optimal cavity count and tray configuration.
Step 1: Define Your Target Output
Start with your production target. This drives everything else.
| Question | Example Answer |
|---|---|
| Daily production target | 3,000 gummies per day |
| Operating hours per day | 8 hours |
| Cycles per hour | 4 (including cooling time) |
| Pieces per cycle needed | 3,000 ÷ (8 × 4) = 94 cavities |
Realistic Cycle Time
| Factor | Impact on Cycle Time |
|---|---|
| Cooling capacity | Walk-in chiller: 5–15 min; Refrigerator: 20–45 min; Ambient: 60+ min |
| Product thickness | Thicker pieces take longer to set |
| Tray size | Larger trays take longer to cool uniformly |
| Depositor speed | Multi-head depositors fill faster |
Typical cycle times:
- With walk-in chiller: 10–20 minutes per cycle
- With commercial refrigerator: 30–45 minutes per cycle
- Ambient cooling: 60–90 minutes per cycle
Step 2: Calculate Cavity Volume from Piece Weight
Use the formula:
`` Cavity Volume (ml) = Target Weight (g) ÷ Material Density (g/ml) ``
Common Gummy Material Densities
| Material | Density (g/ml) |
|---|---|
| Gummy (gelatin) | 1.37 |
| Gummy (pectin) | 1.35 |
| Gummy (agar) | 1.33 |
| Chocolate | 1.32 |
| Hard candy | 1.40 |
Worked Example: 2g Gummy Bear
`` Cavity Volume = 2.0g ÷ 1.37 g/ml = 1.46 ml ``
Your mold cavities should each hold approximately 1.46ml of gummy mix to produce a 2g gummy bear.
Step 3: Determine Tray and Cavity Layout
Standard Tray Sizes
| Tray Size | Max Cavities (2g gummies) | Best For |
|---|---|---|
| 40 × 60cm | ~200 | Small batches, limited space |
| 50 × 70cm | ~300 | Medium production |
| 60 × 80cm | ~400 | High-volume production |
| Custom | Variable | Specialized equipment |
Matching Cavity Count to Daily Output
| Daily Output | Pieces/Cycle | Recommended Cavities | Tray Configuration |
|---|---|---|---|
| 500 | 63 (8 cycles/day) | 100 | 1 × 40×60cm |
| 1,000 | 125 | 200 | 1 × 50×70cm |
| 2,000 | 250 | 300 | 1 × 50×70cm |
| 3,000 | 375 | 400 | 1 × 60×80cm or 2 × 50×70cm |
| 5,000 | 625 | 600 | 2 × 60×80cm |
| 10,000 | 1,250 | 1,200 | 4 × 60×80cm |
Step 4: Factor in Your Equipment
Depositor Compatibility
| Depositor Type | Tray Dimensions | Notes |
|---|---|---|
| Manual pour | Any | Flexibility in tray size |
| Flood-and-scrape | 40×60cm, 50×70cm standard | Requires flat pour surface |
| Orosuki depositor | Check manufacturer specs | May have specific tray requirements |
| Nectar depositor | Check manufacturer specs | Verify spacing and clearance |
Cooling Capacity
| Cooling Method | Cycles per Hour | Notes |
|---|---|---|
| Walk-in chiller (2–4°C) | 3–6 | Fastest turnaround |
| Commercial refrigerator (0–4°C) | 1–3 | Moderate speed |
| Ambient (20–25°C) | 0.5–1 | Slowest; best for small batches |
Step 5: Optimize for Throughput and Cost
Don't Over-Invest in Cavity Count
If your daily output is 1,000 pieces and you have a 200-cavity mold:
- You need 5 cycles per day
- At 2 cycles/hour, that's 2.5 hours of production time
- A 400-cavity mold would halve your production time but cost more upfront
Rule of thumb: Design for your current output plus 25% growth headroom. Don't design for theoretical maximum output.
Don't Under-Invest Either
If your daily output is 5,000 pieces with a 200-cavity mold:
- You need 25 cycles per day
- That's 3+ cycles per hour just for production (not counting cooling)
- You'll be constantly bottlenecked by mold capacity
Signs you need more cavities:
- Operators waiting on molds to cool before they can pour the next batch
- Overtime or shift work needed to meet demand
- Machine idle time while waiting for molds
Quick Reference: Cavity Count Calculator
| Target Weight | Tray Size | ~Cavities | Daily Output (4 cycles/hr, 8hr day) |
|---|---|---|---|
| 1g | 40×60cm | 300 | 9,600 |
| 1g | 50×70cm | 400 | 12,800 |
| 2g | 40×60cm | 200 | 6,400 |
| 2g | 50×70cm | 250 | 8,000 |
| 2g | 60×80cm | 350 | 11,200 |
| 3g | 40×60cm | 150 | 4,800 |
| 3g | 50×70cm | 200 | 6,400 |
| 5g | 40×60cm | 100 | 3,200 |
| 5g | 50×70cm | 120 | 3,840 |
Common Mistakes
Mistake 1: Choosing Cavity Count Without Considering Cooling
More cavities don't help if your cooling capacity is the bottleneck. Match mold size to your chiller capacity.
Mistake 2: Over-Sizing for Future Growth
Designing for 10× your current output wastes tooling investment. Plan for 25% growth, not 1000%.
Mistake 3: Ignoring Depositor Compatibility
A 600-cavity tray won't help if it doesn't fit your depositor. Always verify tray dimensions against your equipment.
Mistake 4: Not Accounting for Weight Variation
Higher cavity counts increase the chance of weight variation. Test and verify with prototype pieces before approving production.
FAQ
Q: How do I know if my cavity count is right? A: Run a production simulation. If you can meet your daily output target within your available operating hours without operators waiting on molds, your cavity count is well-matched.
Q: Can I add cavities to an existing mold? A: No. Cavity count is determined during the mold design phase. If you need more output, we can design additional trays or a higher-cavity mold for your next order.
Q: What's the maximum cavity count per tray? A: Standard trays accommodate up to 600 cavities. Larger configurations are possible with custom tray sizes.
Q: Does higher cavity count always mean lower cost per piece? A: Not necessarily. Higher cavity count increases tooling cost. The cost per piece decreases only if you're using the additional cavities to their full capacity. Right-size your cavity count to your actual output.
Q: How do I calculate the cavity volume for my specific product? A: Provide your target piece weight and material type. Our engineering team will calculate the exact cavity volume and design the mold accordingly.
Need Help Sizing Your Mold?
Send us your target output, piece weight, and equipment details. We'll recommend the optimal cavity count and tray configuration for your production.
*Published: 2026-08-13 | Category: Production Guide | Read Time: 9 minutes*
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