Opinion Poll by Kantar TNS for Helsingin Sanomat, 20 August–14 September 2018
Voting Intentions | Seats | Coalitions | Technical Information
Voting Intentions

Confidence Intervals
| Party | Last Result | Poll Result | 80% Confidence Interval | 90% Confidence Interval | 95% Confidence Interval | 99% Confidence Interval |
|---|---|---|---|---|---|---|
| Suomen Sosialidemokraattinen Puolue | 16.5% | 21.4% | 20.1–22.7% | 19.7–23.1% | 19.4–23.5% | 18.8–24.1% |
| Kansallinen Kokoomus | 18.2% | 19.7% | 18.4–21.0% | 18.1–21.4% | 17.8–21.7% | 17.2–22.4% |
| Suomen Keskusta | 21.1% | 15.5% | 14.4–16.7% | 14.1–17.1% | 13.8–17.3% | 13.3–18.0% |
| Vihreä liitto | 8.5% | 12.9% | 11.9–14.1% | 11.6–14.4% | 11.4–14.7% | 10.9–15.2% |
| Vasemmistoliitto | 7.1% | 9.6% | 8.7–10.6% | 8.4–10.9% | 8.2–11.1% | 7.8–11.6% |
| Perussuomalaiset | 17.6% | 8.7% | 7.9–9.7% | 7.6–10.0% | 7.4–10.2% | 7.0–10.7% |
| Svenska folkpartiet i Finland | 4.9% | 4.5% | 3.9–5.3% | 3.7–5.5% | 3.6–5.7% | 3.3–6.0% |
| Kristillisdemokraatit | 3.5% | 3.9% | 3.3–4.6% | 3.2–4.8% | 3.0–5.0% | 2.8–5.3% |
| Sininen tulevaisuus | 0.0% | 1.6% | 1.3–2.1% | 1.2–2.3% | 1.1–2.4% | 1.0–2.6% |
Note: The poll result column reflects the actual value used in the calculations. Published results may vary slightly, and in addition be rounded to fewer digits.
Seats

Confidence Intervals
| Party | Last Result | Median | 80% Confidence Interval | 90% Confidence Interval | 95% Confidence Interval | 99% Confidence Interval |
|---|---|---|---|---|---|---|
| Suomen Sosialidemokraattinen Puolue | 34 | 47 | 45–52 | 44–52 | 43–52 | 42–56 |
| Kansallinen Kokoomus | 37 | 42 | 38–47 | 37–48 | 37–48 | 37–49 |
| Suomen Keskusta | 49 | 35 | 34–39 | 33–41 | 32–42 | 31–43 |
| Vihreä liitto | 15 | 25 | 22–28 | 22–28 | 21–29 | 19–30 |
| Vasemmistoliitto | 12 | 18 | 16–21 | 16–22 | 15–22 | 14–23 |
| Perussuomalaiset | 38 | 16 | 14–19 | 14–20 | 13–21 | 12–22 |
| Svenska folkpartiet i Finland | 9 | 9 | 7–11 | 7–11 | 7–11 | 6–12 |
| Kristillisdemokraatit | 5 | 6 | 3–6 | 2–6 | 2–6 | 2–6 |
| Sininen tulevaisuus | 0 | 0 | 0 | 0 | 0 | 0–1 |
Suomen Sosialidemokraattinen Puolue
For a full overview of the results for this party, see the Suomen Sosialidemokraattinen Puolue page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 34 | 0% | 100% | Last Result |
| 35 | 0% | 100% | |
| 36 | 0% | 100% | |
| 37 | 0% | 100% | |
| 38 | 0% | 100% | |
| 39 | 0% | 100% | |
| 40 | 0.1% | 99.9% | |
| 41 | 0.3% | 99.8% | |
| 42 | 0.8% | 99.5% | |
| 43 | 3% | 98.7% | |
| 44 | 3% | 96% | |
| 45 | 7% | 93% | |
| 46 | 8% | 86% | |
| 47 | 33% | 78% | Median |
| 48 | 15% | 45% | |
| 49 | 7% | 31% | |
| 50 | 5% | 23% | |
| 51 | 7% | 18% | |
| 52 | 9% | 11% | |
| 53 | 1.1% | 2% | |
| 54 | 0.3% | 1.4% | |
| 55 | 0.5% | 1.1% | |
| 56 | 0.3% | 0.6% | |
| 57 | 0.1% | 0.2% | |
| 58 | 0.1% | 0.1% | |
| 59 | 0% | 0% |
Kansallinen Kokoomus
For a full overview of the results for this party, see the Kansallinen Kokoomus page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 35 | 0.1% | 100% | |
| 36 | 0.1% | 99.9% | |
| 37 | 5% | 99.8% | Last Result |
| 38 | 9% | 95% | |
| 39 | 6% | 86% | |
| 40 | 7% | 80% | |
| 41 | 18% | 73% | |
| 42 | 15% | 55% | Median |
| 43 | 11% | 40% | |
| 44 | 5% | 29% | |
| 45 | 6% | 25% | |
| 46 | 4% | 18% | |
| 47 | 9% | 15% | |
| 48 | 3% | 5% | |
| 49 | 2% | 2% | |
| 50 | 0.1% | 0.2% | |
| 51 | 0% | 0.1% | |
| 52 | 0% | 0% |
Suomen Keskusta
For a full overview of the results for this party, see the Suomen Keskusta page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 29 | 0.1% | 100% | |
| 30 | 0.3% | 99.8% | |
| 31 | 0.8% | 99.5% | |
| 32 | 2% | 98.8% | |
| 33 | 4% | 97% | |
| 34 | 38% | 93% | |
| 35 | 22% | 54% | Median |
| 36 | 9% | 32% | |
| 37 | 8% | 22% | |
| 38 | 4% | 14% | |
| 39 | 3% | 11% | |
| 40 | 2% | 8% | |
| 41 | 3% | 6% | |
| 42 | 2% | 4% | |
| 43 | 0.8% | 1.1% | |
| 44 | 0.3% | 0.3% | |
| 45 | 0% | 0% | |
| 46 | 0% | 0% | |
| 47 | 0% | 0% | |
| 48 | 0% | 0% | |
| 49 | 0% | 0% | Last Result |
Vihreä liitto
For a full overview of the results for this party, see the Vihreä liitto page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 15 | 0% | 100% | Last Result |
| 16 | 0% | 100% | |
| 17 | 0% | 100% | |
| 18 | 0.1% | 100% | |
| 19 | 0.6% | 99.9% | |
| 20 | 1.3% | 99.2% | |
| 21 | 2% | 98% | |
| 22 | 14% | 96% | |
| 23 | 11% | 82% | |
| 24 | 13% | 71% | |
| 25 | 28% | 58% | Median |
| 26 | 12% | 30% | |
| 27 | 7% | 18% | |
| 28 | 7% | 11% | |
| 29 | 2% | 4% | |
| 30 | 2% | 2% | |
| 31 | 0.4% | 0.5% | |
| 32 | 0% | 0% |
Vasemmistoliitto
For a full overview of the results for this party, see the Vasemmistoliitto page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 12 | 0% | 100% | Last Result |
| 13 | 0.1% | 100% | |
| 14 | 1.0% | 99.8% | |
| 15 | 1.5% | 98.8% | |
| 16 | 14% | 97% | |
| 17 | 21% | 84% | |
| 18 | 17% | 63% | Median |
| 19 | 17% | 46% | |
| 20 | 13% | 29% | |
| 21 | 10% | 16% | |
| 22 | 5% | 6% | |
| 23 | 0.7% | 0.9% | |
| 24 | 0.1% | 0.2% | |
| 25 | 0% | 0.1% | |
| 26 | 0% | 0% |
Perussuomalaiset
For a full overview of the results for this party, see the Perussuomalaiset page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 11 | 0.2% | 100% | |
| 12 | 2% | 99.8% | |
| 13 | 3% | 98% | |
| 14 | 28% | 95% | |
| 15 | 13% | 67% | |
| 16 | 19% | 54% | Median |
| 17 | 9% | 35% | |
| 18 | 10% | 26% | |
| 19 | 9% | 16% | |
| 20 | 3% | 7% | |
| 21 | 3% | 4% | |
| 22 | 0.6% | 0.7% | |
| 23 | 0.1% | 0.1% | |
| 24 | 0% | 0% | |
| 25 | 0% | 0% | |
| 26 | 0% | 0% | |
| 27 | 0% | 0% | |
| 28 | 0% | 0% | |
| 29 | 0% | 0% | |
| 30 | 0% | 0% | |
| 31 | 0% | 0% | |
| 32 | 0% | 0% | |
| 33 | 0% | 0% | |
| 34 | 0% | 0% | |
| 35 | 0% | 0% | |
| 36 | 0% | 0% | |
| 37 | 0% | 0% | |
| 38 | 0% | 0% | Last Result |
Svenska folkpartiet i Finland
For a full overview of the results for this party, see the Svenska folkpartiet i Finland page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 5 | 0% | 100% | |
| 6 | 1.0% | 99.9% | |
| 7 | 12% | 98.9% | |
| 8 | 31% | 87% | |
| 9 | 21% | 56% | Last Result, Median |
| 10 | 15% | 35% | |
| 11 | 19% | 20% | |
| 12 | 0.3% | 0.5% | |
| 13 | 0.2% | 0.2% | |
| 14 | 0% | 0% |
Kristillisdemokraatit
For a full overview of the results for this party, see the Kristillisdemokraatit page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 0 | 0.1% | 100% | |
| 1 | 0.4% | 99.9% | |
| 2 | 6% | 99.5% | |
| 3 | 4% | 94% | |
| 4 | 3% | 90% | |
| 5 | 19% | 87% | Last Result |
| 6 | 68% | 68% | Median |
| 7 | 0.3% | 0.4% | |
| 8 | 0% | 0.1% | |
| 9 | 0% | 0% |
Sininen tulevaisuus
For a full overview of the results for this party, see the Sininen tulevaisuus page.

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 0 | 98.7% | 100% | Last Result, Median |
| 1 | 1.3% | 1.3% | |
| 2 | 0% | 0% |
Coalitions

Confidence Intervals
| Coalition | Last Result | Median | Majority? | 80% Confidence Interval | 90% Confidence Interval | 95% Confidence Interval | 99% Confidence Interval |
|---|---|---|---|---|---|---|---|
| Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Vihreä liitto – Vasemmistoliitto – Svenska folkpartiet i Finland – Kristillisdemokraatit | 112 | 148 | 100% | 143–151 | 143–151 | 142–152 | 139–154 |
| Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Vihreä liitto – Svenska folkpartiet i Finland – Kristillisdemokraatit | 100 | 129 | 100% | 125–134 | 124–134 | 123–134 | 121–136 |
| Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Svenska folkpartiet i Finland – Kristillisdemokraatit | 85 | 105 | 84% | 100–109 | 99–110 | 98–110 | 97–112 |
| Kansallinen Kokoomus – Suomen Keskusta – Perussuomalaiset | 124 | 93 | 2% | 90–98 | 88–99 | 87–100 | 86–102 |
| Kansallinen Kokoomus – Suomen Keskusta – Sininen tulevaisuus | 86 | 77 | 0% | 74–82 | 73–83 | 72–84 | 70–85 |
Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Vihreä liitto – Vasemmistoliitto – Svenska folkpartiet i Finland – Kristillisdemokraatit

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 112 | 0% | 100% | Last Result |
| 113 | 0% | 100% | |
| 114 | 0% | 100% | |
| 115 | 0% | 100% | |
| 116 | 0% | 100% | |
| 117 | 0% | 100% | |
| 118 | 0% | 100% | |
| 119 | 0% | 100% | |
| 120 | 0% | 100% | |
| 121 | 0% | 100% | |
| 122 | 0% | 100% | |
| 123 | 0% | 100% | |
| 124 | 0% | 100% | |
| 125 | 0% | 100% | |
| 126 | 0% | 100% | |
| 127 | 0% | 100% | |
| 128 | 0% | 100% | |
| 129 | 0% | 100% | |
| 130 | 0% | 100% | |
| 131 | 0% | 100% | |
| 132 | 0% | 100% | |
| 133 | 0% | 100% | |
| 134 | 0% | 100% | |
| 135 | 0% | 100% | |
| 136 | 0% | 100% | |
| 137 | 0% | 100% | |
| 138 | 0.1% | 99.9% | |
| 139 | 0.4% | 99.8% | |
| 140 | 0.6% | 99.5% | |
| 141 | 1.2% | 98.8% | |
| 142 | 2% | 98% | |
| 143 | 6% | 96% | |
| 144 | 4% | 89% | |
| 145 | 10% | 85% | |
| 146 | 11% | 75% | |
| 147 | 5% | 64% | Median |
| 148 | 16% | 59% | |
| 149 | 18% | 42% | |
| 150 | 4% | 25% | |
| 151 | 17% | 21% | |
| 152 | 2% | 3% | |
| 153 | 1.0% | 2% | |
| 154 | 0.4% | 0.6% | |
| 155 | 0.2% | 0.2% | |
| 156 | 0% | 0.1% | |
| 157 | 0% | 0% |
Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Vihreä liitto – Svenska folkpartiet i Finland – Kristillisdemokraatit

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 100 | 0% | 100% | Last Result |
| 101 | 0% | 100% | Majority |
| 102 | 0% | 100% | |
| 103 | 0% | 100% | |
| 104 | 0% | 100% | |
| 105 | 0% | 100% | |
| 106 | 0% | 100% | |
| 107 | 0% | 100% | |
| 108 | 0% | 100% | |
| 109 | 0% | 100% | |
| 110 | 0% | 100% | |
| 111 | 0% | 100% | |
| 112 | 0% | 100% | |
| 113 | 0% | 100% | |
| 114 | 0% | 100% | |
| 115 | 0% | 100% | |
| 116 | 0% | 100% | |
| 117 | 0% | 100% | |
| 118 | 0% | 100% | |
| 119 | 0% | 100% | |
| 120 | 0.2% | 99.9% | |
| 121 | 0.5% | 99.8% | |
| 122 | 0.9% | 99.3% | |
| 123 | 1.0% | 98% | |
| 124 | 3% | 97% | |
| 125 | 7% | 94% | |
| 126 | 7% | 88% | |
| 127 | 9% | 80% | |
| 128 | 11% | 71% | |
| 129 | 11% | 60% | Median |
| 130 | 22% | 50% | |
| 131 | 7% | 27% | |
| 132 | 5% | 21% | |
| 133 | 5% | 15% | |
| 134 | 9% | 11% | |
| 135 | 0.7% | 1.3% | |
| 136 | 0.4% | 0.6% | |
| 137 | 0.2% | 0.2% | |
| 138 | 0.1% | 0.1% | |
| 139 | 0% | 0% |
Suomen Sosialidemokraattinen Puolue – Kansallinen Kokoomus – Svenska folkpartiet i Finland – Kristillisdemokraatit

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 85 | 0% | 100% | Last Result |
| 86 | 0% | 100% | |
| 87 | 0% | 100% | |
| 88 | 0% | 100% | |
| 89 | 0% | 100% | |
| 90 | 0% | 100% | |
| 91 | 0% | 100% | |
| 92 | 0% | 100% | |
| 93 | 0% | 100% | |
| 94 | 0% | 100% | |
| 95 | 0.1% | 99.9% | |
| 96 | 0.3% | 99.9% | |
| 97 | 0.4% | 99.6% | |
| 98 | 3% | 99.2% | |
| 99 | 2% | 96% | |
| 100 | 10% | 94% | |
| 101 | 5% | 84% | Majority |
| 102 | 7% | 79% | |
| 103 | 7% | 72% | |
| 104 | 12% | 65% | Median |
| 105 | 18% | 53% | |
| 106 | 11% | 36% | |
| 107 | 8% | 25% | |
| 108 | 4% | 17% | |
| 109 | 4% | 13% | |
| 110 | 7% | 8% | |
| 111 | 0.5% | 1.1% | |
| 112 | 0.4% | 0.7% | |
| 113 | 0.1% | 0.2% | |
| 114 | 0% | 0.1% | |
| 115 | 0.1% | 0.1% | |
| 116 | 0% | 0% |
Kansallinen Kokoomus – Suomen Keskusta – Perussuomalaiset

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 84 | 0.1% | 100% | |
| 85 | 0.2% | 99.9% | |
| 86 | 0.7% | 99.6% | |
| 87 | 2% | 98.9% | |
| 88 | 3% | 97% | |
| 89 | 2% | 94% | |
| 90 | 5% | 92% | |
| 91 | 18% | 87% | |
| 92 | 10% | 70% | |
| 93 | 11% | 59% | Median |
| 94 | 10% | 48% | |
| 95 | 8% | 38% | |
| 96 | 8% | 31% | |
| 97 | 6% | 22% | |
| 98 | 9% | 16% | |
| 99 | 4% | 7% | |
| 100 | 0.7% | 3% | |
| 101 | 2% | 2% | Majority |
| 102 | 0.3% | 0.6% | |
| 103 | 0.1% | 0.3% | |
| 104 | 0.1% | 0.2% | |
| 105 | 0% | 0.1% | |
| 106 | 0% | 0% | |
| 107 | 0% | 0% | |
| 108 | 0% | 0% | |
| 109 | 0% | 0% | |
| 110 | 0% | 0% | |
| 111 | 0% | 0% | |
| 112 | 0% | 0% | |
| 113 | 0% | 0% | |
| 114 | 0% | 0% | |
| 115 | 0% | 0% | |
| 116 | 0% | 0% | |
| 117 | 0% | 0% | |
| 118 | 0% | 0% | |
| 119 | 0% | 0% | |
| 120 | 0% | 0% | |
| 121 | 0% | 0% | |
| 122 | 0% | 0% | |
| 123 | 0% | 0% | |
| 124 | 0% | 0% | Last Result |
Kansallinen Kokoomus – Suomen Keskusta – Sininen tulevaisuus

| Number of Seats | Probability | Accumulated | Special Marks |
|---|---|---|---|
| 68 | 0.1% | 100% | |
| 69 | 0.1% | 99.9% | |
| 70 | 0.4% | 99.9% | |
| 71 | 1.3% | 99.5% | |
| 72 | 2% | 98% | |
| 73 | 5% | 97% | |
| 74 | 4% | 92% | |
| 75 | 15% | 87% | |
| 76 | 10% | 72% | |
| 77 | 19% | 62% | Median |
| 78 | 8% | 43% | |
| 79 | 6% | 35% | |
| 80 | 8% | 29% | |
| 81 | 8% | 22% | |
| 82 | 4% | 13% | |
| 83 | 5% | 9% | |
| 84 | 3% | 4% | |
| 85 | 0.8% | 1.1% | |
| 86 | 0.2% | 0.4% | Last Result |
| 87 | 0.1% | 0.2% | |
| 88 | 0% | 0.1% | |
| 89 | 0% | 0% |
Technical Information
Opinion Poll
- Polling firm: Kantar TNS
- Commissioner(s): Helsingin Sanomat
- Fieldwork period: 20 August–14 September 2018
Calculations
- Sample size: 1595
- Simulations done: 1,048,576
- Error estimate: 1.89%