© 2026 Greg T. Chism · MIT License

Backpropagation & Computational Graphs — Interactive Explorer

Step through forward and backward passes — see values flow forward and gradients flow back via the chain rule, one node at a time


Input Values
x₁ 2.0
x₂ 1.0
changing inputs resets the current pass
Weights & Bias
w₁0.50
w₂−0.30
b0.10
fixed for this network example
Pass Mode
computing node values left → right
Navigation
Speed Medium
What's happening?
Select a pass mode and press Next → to begin stepping through the graph.
Step 0
Node
Value
Computational Graph — nodes & data flow
Fwd active Fwd done Bwd active Bwd done
ForwardChain Rule at this Step