How to Calculate Pokémon IVs from Stats (Main Series): Level, Nature, EVs

Learn the inputs needed to infer IV ranges (0–31) from in-game stats, plus common mistakes with EVs and nature multipliers.

What you need to calculate IVs from stats

In main-series Pokémon games, an IV is a hidden value from 0 to 31 for each stat.

To infer IV ranges, you need accurate inputs:

• Pokémon species (base stats)
• level
• nature (stat modifier)
• EVs (effort values)
• observed stats (HP/Atk/Def/SpA/SpD/Spe)

Use the tool here: Pokémon IV/EV Calculator

Common mistakes that break IV calculations

• Wrong nature (even one modifier changes the result)
• Unknown EVs (assume 0 only if you’re sure)
• Mixing formats (battle/showdown stats vs in-game stats)

If you’re unsure about EVs or natures, these guides help:

• EV Training Basics
• Nature Stat Modifiers