UK Polling Tools
Interactive calculators and tools to explore UK polling data. Model seat projections, understand swing, and visualise what current polls mean for the 2029 General Election.
Available Tools
All tools are free to use, built on publicly available data, and updated regularly.
Seat Projection Calculator
Use sliders to set each party’s vote share and see projected Westminster seats using uniform swing from the 2024 General Election. Understand how FPTP distorts results.
Swing Calculator
Model what happens when votes swing between parties. Select From/To party, set the swing amount, and see new vote shares and estimated seat changes based on current VI.
Poll Tracker
8-week voting intention trend chart plus table of the 10 most recent polls. Sources: YouGov, Ipsos, Survation, Redfield & Wilton. Updated weekly.
Leader Approval Tracker
Track net approval ratings for all UK party leaders over time. Compare Starmer, Farage, Badenoch and Davey. Coming soon.
Understanding the Tools
Important: These are simplified models
The seat calculator and swing calculator use uniform national swing (UNS) — a simplified model that applies the same swing equally across all 650 constituencies. Real elections are far more complex: local factors, tactical voting, incumbency effects, and regional variation all play a role. For more sophisticated projections, see MRP polling from YouGov and Electoral Calculus.