Custom Seat Calculator

Enter your own poll and generate seat predictions and a live map

Labour

%

Conservative

%

Liberal Democrats

%

Reform UK

%

Green

%

SNP

%

Plaid Cymru

%

Others

%

Labour

%

Conservative

%

Liberal Democrats

%

Reform UK

%

Green

%

SNP

%

Plaid Cymru

%

Others

%

Select a pre-defined scenario or enter your own tactical voting numbers

Click Run Prediction again to update if the scenario has been changed

Total: 0.0%
Enter at least two parties. Values will be normalized automatically if they don't total 100%. Normalization scales all values proportionally to sum to 100%. For example, if you enter 40% and 30%, they become 57.1% and 42.9% respectively.
Shows seat counts if the runner-up party wins instead. Useful for understanding how close races affect overall results.
Display seat counts based on runner‑up in each constituency.
Updates results and map only

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Interactive Constituency Map Click on any constituency to see detailed results. The map shows predicted winners based on your poll inputs using Uniform National Swing methodology.

Filter by region:
Highlights competitive seats by margin: Very tight (0-2%), Tight (2-5%), Close (5-8%). The side panel shows the top 20 most marginal seats with swing analysis.
Highlight seats by margin: Very tight (0-2%) , Tight (2-5%) , Close (5-8%)

Swings vs GE2024 (GB) Shows the change in vote share and seat distribution compared to the 2024 General Election. Baseline uses Great Britain only (excludes Northern Ireland).

Baseline uses GB-only results (excludes Northern Ireland)

Constituency Results Full list of all constituencies with predicted winners, margins, and changes from GE2024. Use filters to find specific seats or parties.

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Custom Seat Projection

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