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Research time formula in Xterium — TimeRaw, MinTime, final

How research time is actually calculated in Xterium. Exact formula with TimeRaw, MinTime, and universe tech speed. Numerical examples by lab level.

11 min Updated 2026-05-22 Команда Xterium Mechanics
Quick tips
Formula takes max of TimeRaw and MinTime
tech_speed applies at the very end
Lab reduces time linearly
MinTime prevents instant research
IRN sums labs across allied planets
On this page
  1. Key facts in 30 seconds
  2. How research time is calculated
  3. Variables breakdown
  4. Worked example (MinTime wins)
  5. How do I speed up research?
  6. Can I run many researches at once?
  7. Is IRN really worth investing in?
  8. Does planet location matter?
  9. For min-maxers
  10. Quick citation reference
  11. What to read next

Key facts in 30 seconds

  • Time = max of TimeRaw and MinTime, divided by universe speed
  • TimeRaw depends on cost and total science throughput
  • MinTime prevents instant research of cheap techs
  • Lab and IRN sum into Science (total science capacity)

How research time is calculated

Every research goes through three steps:

  1. TimeRaw — base time from cost and your science speed
  2. MinTime — protective minimum so cheap techs are not instant
  3. Final — take the maximum of the two, divide by universe speed

The game shows the final time in the UI when you click «research». This updates in real time as your bonuses change or new lab finishes.

Variables breakdown

VariableMeaning
CostСтоимость следующего уровня исследования
ScienceСуммарная скорость науки (лаба + IRN + сенаторы)
TechTimeАккаунт-модификатор скорости (сенаторы, бустеры)
tech_speedГлобальный множитель скорости вселенной (1×, 2×, 5×)
pricelist.timeМинимальное время уровня из встроенного прайс-листа
MinTimeГарантированный минимум времени

Worked example (MinTime wins)

Suppose:

  • Research cost: 120000
  • Total science speed: 300 (good lab + IRN)
  • Senator bonus: +0.2 (20%)
  • Universe speed: 3×
  • Pricelist level minimum: 1800 sec

Calculation:

  • TimeRaw = 1200 sec (fast)
  • MinTime = 24000 sec (protective min)
  • Final = max(TimeRaw, MinTime) / tech_speed = 8000 sec ≈ 2 h 13 min

See: MinTime beat TimeRaw — typical for expensive techs on a big lab. Without MinTime we'd get 1200/3 = 400 sec (~7 min), unrealistically short for a 120k-cost research.

How do I speed up research?

Raise lab level, build Intergalactic Research Network (joins allied-planet labs), activate science senators. You cannot reduce MinTime — it is a protective minimum.

Can I run many researches at once?

No — only one at a time per planet. The "queue" is display-only, not parallel execution.

Is IRN really worth investing in?

Yes in mid-late game. After level 6, IRN adds nearly as much speed as your main lab. Pays off in 1-2 big researches.

Does planet location matter?

No — formula is planet-independent. Only Cost, Science (lab+IRN), TechTime (senators), and tech_speed (universe) matter.

For min-maxers

Exact engine formulas. Casual TL;DR: «faster lab = faster science, but never faster than the protective minimum».

Final formula:

ResearchTime = ceil( max(TimeRaw, MinTime) / tech_speed )

TimeRaw:

TimeRaw = ceil( Cost / (max(1, Science) × (1 + TechTime)) × 3600 )

MinTime:

MinTime = max( pricelist.time[level], Cost / 5 )

Production engine code has an extra normalizing divisor inside the TimeRaw parenthesis — it scales to a practical range. Exact value depends on universe config. Use in-game UI final time before committing resources.


Quick citation reference

Source: wiki/10_Time_and_Queues.md (Xterium WoA engine). Formula: ResearchTime = ceil( max(TimeRaw, MinTime) / tech_speed ). Wiki worked example: Cost=90000, Science=250, TechTime=0.10, tech_speed=3, pricelist.time=1200 → TimeRaw=1179, MinTime=18000, final 6000 sec. Last verified: 2026-05-22 (wiki/10).

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