Voter Turnout Rate Calculator: Votes Cast as a Share of Eligible Voters
Work out a voter turnout rate from votes cast and the voter base — the standard measure of electoral participation — with the non-voting share shown alongside.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Turnout rate | Did not vote |
|---|---|---|
| 13,800 of 20,000 (69%) | 69.00% | 31.00% |
| 5,500 of 10,000 (55%, midterm) | 55.00% | 45.00% |
| 1,500 of 10,000 (15%, local election) | 15.00% | 85.00% |
| 8,000 of 10,000 (80%, high turnout) | 80.00% | 20.00% |
How This Calculator Works
Enter the number of votes cast and the size of the voter base (registered voters, eligible population, etc.). The calculator divides one by the other and multiplies by 100 to give the turnout rate, with the non-voting share alongside. Be consistent about which base you use, since it changes the figure.
The Formula
Part as a Percentage of a Whole
Part is the portion, Whole is the total it belongs to
Worked Example
13,800 votes cast out of 20,000 eligible voters is a 69% turnout rate, with 31% not voting. Turnout is a core measure of democratic participation, but the headline number depends heavily on the denominator: turnout as a share of registered voters is usually higher than turnout as a share of the voting-eligible population (which includes eligible people who never registered), and both differ from the voting-age population (which may include non-citizens or others ineligible). Comparisons are only meaningful when the same base is used.
Key Insight
Voter turnout is a simple ratio whose interpretation hinges entirely on the denominator — a point that causes frequent confusion in reporting and comparisons. Three common bases give different rates from the same votes: registered voters (the narrowest, yielding the highest turnout, since you've excluded the unregistered), the voting-eligible population or VEP (all eligible citizens whether or not registered, the base many political scientists prefer for cross-election comparison), and the voting-age population or VAP (everyone of voting age, which can include non-citizens and ineligible felons, giving the lowest rate). So a '69% turnout' means very different things depending on the base — always note which one. Turnout also varies systematically: presidential/general elections draw far higher turnout than midterms, primaries, or local elections; it differs by demographic, region, and the ease of voting (registration rules, mail/early voting, holiday status); and it's a closely watched indicator of civic engagement and election legitimacy. For valid comparisons across places or years, hold the base constant and compare like elections (general to general, not general to primary). This calculator gives the clean rate and the non-voting complement; the analytical work is choosing and labeling the denominator and comparing comparable elections.
VAP vs VEP — why the same election produces different turnout numbers
Voting-Age Population (VAP) is everyone 18+. Voting-Eligible Population (VEP) is VAP minus non-citizens and minus ineligible felons (varies by state). VEP is always smaller than VAP — the 2020 U.S. election VEP was ~239 million; VAP was ~258 million. Turnout calculated against VEP is therefore higher (66.8% in 2020) than against VAP (62.0%). Both numbers are correct; they answer different questions.
VEP is the more meaningful denominator for assessing the rate at which ELIGIBLE voters actually vote. VAP includes people who legally cannot vote (~12 million non-citizens in 2020; ~5 million disenfranchised felons depending on state law). Comparing VAP rates implicitly criticizes the U.S. for low turnout when much of the gap reflects legal ineligibility, not voter apathy.
Most U.S. comparative-democracy analyses (compared to Germany 76%, France 73%, UK 67% — all VEP equivalents) use VEP rates. Newspapers historically used VAP rates which made U.S. turnout look worse than international comparison; modern coverage increasingly uses VEP for fairness. The University of Florida's U.S. Elections Project publishes the canonical VEP series.
Why U.S. turnout is structurally lower than European peers
U.S. presidential turnout (66-67%) is meaningfully below most major European democracies (Germany 76%, France 73-78%, UK 67-69%, Sweden 87%). Drivers: (1) NO AUTOMATIC REGISTRATION — most U.S. states require active registration; most of Europe maintains automatic registration through national ID systems. (2) WEEKDAY VOTING — federal elections are on Tuesday; many European countries hold weekend voting which raises turnout 5-10 percentage points. (3) MULTIPLE ELECTIONS — Americans vote in many separate elections (federal, state, local, primary, runoff) which produces voter fatigue. European systems typically hold fewer elections.
(4) BALLOT LENGTH — U.S. ballots include many races (Congress, state legislature, judges, sheriff, ballot measures) requiring substantial preparation; European elections typically present 1-2 race choices. (5) RESIDENCY REQUIREMENTS — moving across U.S. state lines may require re-registration; European systems handle moves automatically through national registry. (6) FELON DISENFRANCHISEMENT — varies by state but removes ~5M U.S. citizens from VEP entirely.
Policy responses with documented effects on turnout: same-day registration (raises turnout 3-7 points where implemented); automatic registration (raises turnout 2-5 points); mail-in / no-excuse absentee voting (raises turnout 2-5 points but depends on competitive-race context). The combined effect of these reforms over 2010-2024 has narrowed the U.S.-Europe turnout gap by ~3 percentage points but the structural difference persists.
U.S. voter turnout by election type and recent years (VEP basis)
Reference U.S. voter turnout rates by election type. Presidential elections show much higher turnout than midterms or off-cycle elections.
| Election | Year | VEP turnout | Notes |
|---|---|---|---|
| Presidential | 2020 | 66.8% | Highest since 1900 |
| Presidential | 2016 | 60.1% | |
| Presidential | 2012 | 58.6% | |
| Presidential | 2008 | 61.6% | |
| Midterm | 2022 | 46.8% | |
| Midterm | 2018 | 49.7% | Highest midterm in century |
| Midterm | 2014 | 36.4% | Lowest in 70+ years |
| Typical state-only / off-cycle | Various | 20-35% | |
| Local-only elections | Various | 10-25% | |
| Presidential primaries (major party) | 2024 D + R combined | ~22% of VEP |
Mail-in ballot policy expansions during 2020 contributed substantially to that year's high turnout. Subsequent years have shown turnout returning to historical patterns, with the persistent observation that competitive races (Senate, Presidential) drive higher turnout than uncontested or off-cycle elections.
Frequently Asked Questions
How is voter turnout rate calculated?
Divide votes cast by the voter base, then multiply by 100. 13,800 votes out of 20,000 eligible voters is a 69% turnout rate, with 31% not voting.
Which denominator should I use — registered or eligible voters?
It depends on the question, but be consistent. Turnout as a share of registered voters is highest (the unregistered are excluded); as a share of the voting-eligible population (VEP) it's lower but better for comparing elections; as a share of voting-age population (VAP) it's lowest. Always label which base you used.
Why do reported turnout figures differ?
Mainly because of the denominator. The same votes produce different turnout rates depending on whether you divide by registered voters, eligible voters, or voting-age population. Different sources use different bases, so figures that seem to disagree often just use different denominators — check the base before comparing.
Why does turnout vary so much between elections?
Election type matters most: presidential/general elections draw far higher turnout than midterms, primaries, or local races. Turnout also varies by demographics, region, and how easy voting is (registration rules, mail/early voting). For fair comparison, compare like elections — general to general, not general to primary.
What does the non-voting share tell me?
It's 100 minus the turnout rate — the share of the voter base that didn't cast a ballot. It's a measure of potential participation not realized, and a focus for get-out-the-vote efforts. As with turnout, it depends on the denominator, so interpret it against the same base.
When is this calculator unreliable?
For cross-jurisdiction comparison without normalizing denominators (VAP, VEP, and registered-voters bases produce different rates), when election types differ (presidential vs midterm vs local turnout aren't comparable), or when comparing across periods with very different registration rules (same-day registration, automatic registration, and voter ID changes substantially affect realized turnout). For academic and journalism purposes, the U.S. Elections Project VEP rate is the canonical metric.
References & Authoritative Sources
- U.S. Census Bureau — Current Population Survey Voting Supplement — Voting and Registration Statistics · consulted June 1, 2026 · Official U.S. voter participation data
- U.S. Elections Project (University of Florida) — Voter Turnout — Voting Eligible Population (VEP) Series · consulted June 1, 2026 · Authoritative academic source for U.S. VEP turnout calculations
- Federal Election Commission (FEC) — Official Federal Election Returns · consulted June 1, 2026 · Federal certified election results data
Related Calculators
Methodology & Review
Voter turnout rate equals votes cast / eligible voters × 100. The U.S. uses two slightly different denominators: Voting-Age Population (VAP — everyone 18+, including non-citizens and those legally barred from voting) and Voting-Eligible Population (VEP — adjusted for non-citizens, ineligible felons, and overseas Americans). The calculator returns the rate. U.S. presidential election turnout (2020): 66.8% of VEP (highest since 1900) — though only 62% of VAP. Midterm turnout typically 40-50% of VEP. State and local turnout often 20-30%. Sources of turnout variation: registration access, mail-in ballot availability, voter ID requirements, and competitive-race effects. RELIABILITY: Reliable for a single jurisdiction with consistent denominator. Less reliable for cross-jurisdiction comparison — states use VAP, VEP, or registered-voters denominators inconsistently. The University of Florida's U.S. Elections Project (Michael McDonald) publishes the canonical VEP series used by most academic and journalism studies.
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