Nether Portal Calculator
Calculate Nether portal coordinates, travel distances, and obsidian requirements
Calculate Nether Portal Details
Portal Location Results
Travel Distance Analysis
1 block in the Nether = 8 blocks in the Overworld (horizontal travel only)
Example Calculations
Coordinate Conversion Example
Overworld base: (800, 64, 1200)
Nether portal location: (100, 64, 150)
Travel efficiency: 8x faster through Nether
Formula: Nether X,Z = Overworld X,Z ÷ 8
Obsidian Calculation Example
Standard portal (4×5): 10 blocks without corners
Large portal (10×15): 42 blocks without corners
Formula: 2(w-2) + 2(h-2) + 4 (if corners)
Portal Building Steps
Gather Obsidian
Mine with diamond/netherite pickaxe
Or use bucket method with lava
Build Frame
Create rectangular obsidian frame
Minimum 4×5, maximum 23×23
Light Portal
Use flint and steel
Creates purple portal blocks
Portal Tips
Y-coordinate stays the same between dimensions
1 block in Nether = 8 blocks in Overworld
Corner blocks are optional for functionality
Portals link within 17×17 chunks (Overworld)
Can't build portals in the End dimension
Understanding Nether Portals
How Nether Portals Work
Nether portals are rectangular frames of obsidian that create gateways between the Overworld and the Nether. When activated with fire, they transport players between dimensions with coordinate scaling.
Coordinate Conversion
- •Horizontal coordinates (X, Z) scale 1:8 ratio
- •Vertical coordinate (Y) remains unchanged
- •Overworld to Nether: divide by 8
- •Nether to Overworld: multiply by 8
Portal Linking Rules
Search Range: 17×17 chunks (Overworld) / 3×3 chunks (Nether)
- Step 1: Game converts coordinates to target dimension
- Step 2: Searches for existing portals near target
- Step 3: Links to nearest portal if found
- Step 4: Creates new portal if none exist
Tip: Build portals precisely at calculated coordinates to ensure proper linking
Obsidian Requirements Formula
Blocks = 2(width - 2) + 2(height - 2) + 4 (if corners)