oxygen not included food calculator

Why use an Oxygen Not Included food calculator?

In Oxygen Not Included, food shortages can spiral into stress, morale problems, and eventually colony collapse. A food calculator helps you move from guesswork to planning. Instead of wondering if your farms and ranches are “probably enough,” you can calculate a clear target in kilocalories and item count.

This tool is built for practical ONI planning: choose your duplicant count, pick how many cycles you want to survive, add spoilage assumptions, then compare required calories against your current stored food.

How the calculator works

Core formula

The calculator uses a simple pipeline:

• Daily calorie need = Duplicants × kcal per duplicant per cycle
• Total net need = Daily calorie need × planning cycles
• Gross need with spoilage = Net need ÷ (1 − spoilage%)
• Production requirement = Gross need − current stored calories
• Food items needed = Production requirement ÷ kcal per item

If your stored calories already exceed gross need, the calculator reports your surplus and how many cycles your storage can cover.

Common ONI foods (quick reference)

Food	Approx kcal/item	Typical Use
Meal Lice	600	Early game survival, low quality
Mush Bar	800	Emergency calories, water + dirt intensive
Pickled Meal	1800	Improved shelf life for meal lice path
Gristle Berry	2000	Mid-game upgrade from Bristle Blossom cooking
Fried Mushroom / Omelette	2800	Efficient cooked options in many colonies
Barbecue / Pepper Bread	4000	High-calorie, high-quality staple for stable mid/late game
Berry Sludge	4000	Long-term storage and space missions (no spoilage)

Practical planning strategy by game phase

Early game (cycles 1-50)

Prioritize reliability over quality. Mealwood and simple cooking can carry small populations, but watch growth lag and labor bottlenecks. If you print duplicants too quickly, farms will not keep up.

• Keep your dupe count conservative until oxygen and water are stable.
• Avoid relying on Mush Bars except for emergencies.
• Track calories every 10 cycles using this calculator.

Mid game (cycles 50-200)

This is where most colonies either stabilize or starve. Transition into efficient cooked food and/or ranching. You want a system that produces more than current demand so your stockpile grows over time.

• Move toward Barbecue, Gristle Berry, Omelette, or mixed diet.
• Build proper food storage (sterile atmosphere, refrigeration, deep freeze if possible).
• Add a buffer before starting major construction projects.

Late game and space prep

Late-game projects can distract your colony for dozens of cycles. Food plans should include higher reserves, minimal spoilage, and low labor overhead. Berry Sludge is especially useful for very long storage.

• Plan food for rockets and remote outposts separately.
• Include conservative spoilage unless your storage is truly optimized.
• Keep reserve calories for power or cooling disruptions.

Food quality, morale, and why calories are only step one

A colony can survive on calories but still fail from stress. In ONI, food quality contributes to morale, and morale gates higher-tier skills. If your duplicants are over-skilled and under-fed quality-wise, stress management becomes harder.

Use this calculator for quantity, then pair it with your morale plan. As your colony grows, shift from emergency food to stable, higher-quality meals that match your skill loadout.

FAQ

Should I always use 1000 kcal per duplicant?

For most colonies, yes. The calculator allows custom values in case you want special scenario planning, mods, or challenge runs.

How much spoilage should I assume?

If your storage is poor, assume 10-20%. With strong cold-chain storage, you can drop it lower. For Berry Sludge, spoilage can be treated as zero.

What is a safe reserve target?

A common target is 5-10 cycles minimum, then 15+ cycles before expansion spikes, major digging operations, or space program pushes.

Final tip

The best ONI food system is not the “fanciest” one; it is the one that stays stable while everything else goes wrong. Run this calculator regularly, keep a reserve, and your colony will stay fed through heat waves, power failures, and long construction phases.