Keg vs Preserves Jar Calculator
Compare both machines with the same crop inputs so you can decide by value, throughput, and your current farm constraints. Short answer: kegs usually win for premium fruit, while preserves jars win on faster turnover and overflow handling.
Quick answer
- Use kegs for Starfruit, Ancient Fruit, and other premium fruit.
- Use preserves jars when you need faster batch cycles or want to process overflow.
- Best practical setup: kegs for top-tier fruit, jars for everything else that would otherwise sit idle.
Formula Snapshot
- Keg (fruit): output = base x 3, typical planning cycle ~7 days.
- Keg (vegetable): output = floor(base x 2.25), typical planning cycle ~7 days.
- Preserves Jar: output = base x 2 + 50, typical planning cycle ~3 days.
Comparison Table
| Crop | Type | Base | Keg Output | Keg Added/day | Jar Output | Jar Added/day |
|---|---|---|---|---|---|---|
| Starfruit | fruit | 750g | 2,250g | 214.29g/day | 1,550g | 266.67g/day |
| Ancient Fruit | fruit | 550g | 1,650g | 157.14g/day | 1,150g | 200.00g/day |
| Melon | fruit | 250g | 750g | 71.43g/day | 550g | 100.00g/day |
| Blueberry | fruit | 50g | 150g | 14.29g/day | 150g | 33.33g/day |
| Pumpkin | vegetable | 320g | 720g | 57.14g/day | 690g | 123.33g/day |
| Red Cabbage | vegetable | 260g | 585g | 46.43g/day | 570g | 103.33g/day |
Added/day values are planning estimates based on approximate cycle timing.
Routing Tips
- Feed kegs with your highest-value fruit first.
- Use preserves jars to absorb overflow and stabilize daily machine throughput.
- When machines idle, prioritize speed and consistency over perfect per-item value.
- Re-check machine allocation whenever your field size changes.
How to read the comparison
The table separates item value from machine throughput. A Keg normally takes longer, but it adds more value to expensive fruit. A Preserves Jar finishes sooner and adds a fixed 50g on top of twice the base price, which makes it especially useful for lower-value crops or a farm that has more harvest than Kegs. Neither row includes the Artisan profession bonus, because that bonus changes the final sale value of both machines equally and should be applied after choosing a route.
Choose Kegs when value is scarce
If you have a steady supply of Starfruit or Ancient Fruit and enough time to refill machines, protect those inputs for Kegs. The longer cycle is justified by the larger value added per fruit.
Choose Jars when capacity is scarce
If harvested crops are piling up or you can only refill machines once a day, the shorter Jar cycle can turn more of that inventory into saleable goods before the next harvest.
A practical three-step decision
- Count the crop you can actually harvest this week, not the crop you hope to grow next season.
- Reserve Kegs for the highest base-price fruit until their input queue is full.
- Send the remaining crop to Jars, sell it raw, or compare a different profession in the profit calculator.
Example: a farm with 20 Ancient Fruit and 40 Blueberries but only 20 Kegs should put Ancient Fruit in the Kegs first. The Blueberries are not wasted: Jars can process them in shorter cycles while the Kegs work through the premium queue. This capacity-first approach usually beats assigning every crop to the same machine type.
FAQ
Which is better in Stardew Valley: keg or preserves jar?
Kegs are usually better for high-value fruit like Starfruit and Ancient Fruit because they create the highest-value artisan goods. Preserves jars are better when you need faster machine turnover or want to process overflow crops efficiently.
What are the core formulas for kegs and preserves jars?
Kegs produce wine at 3x fruit value and juice at 2.25x vegetable value. Preserves jars produce jelly or pickles at 2x base crop value plus 50g.
Why do preserve jars often feel faster?
Preserves jars complete cycles sooner, so you can process more batches in the same time window. Kegs usually win on top-end value per processed item.
Which machine should I build first?
Use your current bottleneck: if harvest overflow is high, jars stabilize throughput quickly. If you already have steady premium fruit supply, kegs usually scale better long-term.