OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Projectors Methodology v3.0
Projectors Methodology v3.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Projectors Methodology v3.0: the technical score from the specifications is the base, and independent expert and video reviews (up to ±0.5 points), owner opinions (up to ±0.3) and best-of lists (up to +0.3) move it up or down.
Explore Projectors Methodology v3.0

Optoma PH31 review: 86 specs compared

Avg. price:~£350Native panel resolution:1920x1080ANSI lumens:1500Throw ratio:1.5-1.65:1Lamp life:30000 hours

Optoma PH31 Review: Compare 86 technical specifications and 2 expert and video reviews to see how this product ranks in the Projectors category and whether it is worth buying.

Optoma PH31
6.4/10

Overall score

Score
6.4/ 10
✕
What it is
Our main score for this model, 1–10. It combines specs, best-of lists, expert reviews and owners.
How we count it
Parts: Technical score 35%, List score 30%, Reviews score 25%, Sentiment score 10%
Marks: Each part gets a mark out of 10. For reviews, lists and owners, a typical model in this category gets about 8 and the best one gets 10.
No data yet: A part with no data shows "?". It counts as the mark of a weaker model in this category (4 in 5 models with data score higher). This way, models with reviews, lists and owners usually come out ahead.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 87% of models
Score components

35%

5.9

Technical score

30%

?

List scoreNot enough data yet, so we use 7.5, the mark of a weaker model in this category

25%

5.9

Reviews score

10%

?

Sentiment scoreNot enough data yet, so we use 6.8, the mark of a weaker model in this category

â–¼Worse than 87% of projectors
7.1

Value for money

Value for money
7.1/ 10
✕
What it is
An indicator that combines the projector's overall rating with its cost.
When it matters
When you are looking for a projector with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 54% of models
Score components

70%

6.4

Overall score

30%

8.7

Price

â–²Better than 54%
5.9

Technical score

Technical score
5.9/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 78% of models
Score components

42%

7.2

Image Quality

22%

4.6

Projection & Lens

12%

4.7

HDMI & Gaming

10%

5.3

Audio & Features

8%

3.9

Connectivity

6%

6.8

Design & Power

â–¼Worse than 78%
5.9

Reviews score

Reviews score
5.9/ 10
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
Share: Reviews count 25% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 86% of models

5.9

Mark 7.7 is below the typical mark 8.2 of this category, so it cannot lift the score above the technical score

80%

8.1

Average grade

20%

6.1

Popularity

Grades by review (2)
2 video reviews, each counting half as much as a written test. Reviews count 25% of the overall score.
User ratings collected online are not part of this score.
â–¼Worse than 86%
?

List score

List score
7.5/ 10
✕
What it is
How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
How we count it
Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 30% of the overall score.
Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
Lists with this model (0)
Not in any best-of list yet, so this part counts as 7.5. Models in a list get 8 to 10.
Not in any best-of list yet
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Where to buy
*As an Amazon Associate, we earn from qualifying purchases.
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of projector Optoma PH31

Technical score
Technical score
5.9/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 78% of models
Score components:

42%

7.2

Image Quality

22%

4.6

Projection & Lens

12%

4.7

HDMI & Gaming

10%

5.3

Audio & Features

8%

3.9

Connectivity

6%

6.8

Design & Power

5.9
Reviews score
5.9
List score
?
Value for money
Value for money
7.1/ 10
✕
What it is
An indicator that combines the projector's overall rating with its cost.
When it matters
When you are looking for a projector with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 54% of models
Score components:

70%

6.4

Overall score

30%

8.7

Price

7.1
ANSI lumens
1,500
Market range: <250 – >4k
This projector reaches 1,500 ANSI lumens, dimmer than 62.7% of projectors and equal to 1.2% of projectors.
Contrast ratio
250,000:1
This projector has a contrast ratio of 250000:1, higher than 80% of projectors and equal to 0.1% of projectors.
Native panel resolution
1920x1080
This projector uses a native resolution of 1920x1080, higher than 27% of projectors and equal to 59.2% of projectors.
Output resolution
1920x1080
This projector supports output resolution up to 1920x1080, higher than 25.9% of projectors and equal to 42.3% of projectors.
Projection technology
DLP
Show more
Throw ratio
1.5-1.65:1
Min throw distance
1.52 m
Market range: <0.5 m – >2 m
This projector needs a minimum throw distance of 1.52 m, longer than 86.4% of projectors and equal to 0.7% of projectors.
Max projection size
150 inch
Market range: <100 inch – >300 inch
This projector supports projection sizes up to 150 inch, smaller than 67.2% of projectors and equal to 10.2% of projectors.
Zoom ratio
1.1
Market range: <1.1 – >2.1
This projector offers a zoom ratio of 1.1, narrower than 82.4% of projectors and equal to 16.1% of projectors.
Motorized zoom
no
This projector does not have motorised zoom. 14.8% of projectors offer this.
Show more
Input lag
66.8 ms
Market range: <8 ms – >68 ms
This projector has input lag of 66.8 ms, higher than 89.7% of projectors and equal to 0.2% of projectors.
Auto low latency mode (ALLM)
no
This projector does not switch to low-latency mode automatically. 16.1% of projectors offer this.
Variable refresh rate (VRR)
no
This projector does not support variable refresh rate. 1.8% of projectors offer this.
HDMI version
1.4
This projector supports HDMI 1.4, older than 54% of projectors and equal to 35.7% of projectors.
Max HDMI bandwidth
10.2 Gbps
Market range: <10 Gbps – >50 Gbps
This projector supports HDMI bandwidth up to 10.2 Gbps, lower than 51.2% of projectors and equal to 46.5% of projectors.
Show more
N. of HDMI ports
1
Market range: <1 – >6
This projector has 1 HDMI port/s, fewer than 54.2% of projectors and equal to 42.9% of projectors.
Wi-Fi connectivity
no
This projector does not connect to Wi-Fi networks. 53.4% of projectors offer this.
Wi-Fi version
N/A
Bluetooth connectivity
no
This projector does not support Bluetooth. 50.7% of projectors offer this.
Bluetooth version
N/A
Show more
Smart TV features
no
This projector does not have built-in smart TV features. 43.9% of projectors offer this.
Operating system
?
Android OS
no
This projector does not run Android OS. 19.1% of projectors run Android OS.
Dedicated smartphone app
no
This projector does not come with a dedicated smartphone app. 36.8% of projectors come with a dedicated smartphone app.
Remote control
yes
This projector includes a remote control. 1.5% of projectors offer this.
Show more
Light source type
led
This projector uses led light source technology, more advanced than 33.6% of projectors and equal to 39.9% of projectors.
Laser light source
no
This projector does not have a laser light source. 26.8% of projectors offer this.
Lamp life
30,000 hours
Market range: <5k hours – >30k hours
This projector offers lamp life of 30,000 hours, shorter than 67.9% of projectors and equal to 25.9% of projectors.
Lamp life (eco mode)
?
Operating power consumption
140 W
Market range: <50 W – >400 W
This projector uses 140 W of power, less than 62.3% of projectors and equal to 1.2% of projectors.
Show more

Optoma PH31 vs the average projector

246810TotalImage QualityProjection & LensHDMI & GamingConnectivityAudio & FeaturesDesign & Power
  • Wider color gamut
    This projector has a higher color gamut coverage than the average projector (95% DCI-P3 % vs 99% Rec.709 %). The average projector has 99% Rec.709 % of color gamut coverage.
    95% DCI-P3 % vs 99% Rec.709 %
  • Higher contrast ratio
    This projector has a higher contrast ratio than the average projector (250000:1 vs 10000:1). The average projector has 10000:1 of contrast ratio.
    250,000:1 vs 10,000:1
  • Supports curved-surface correction
    This projector corrects warping on curved surfaces, while the average projector does not. 5.5% of projectors offer this.
  • Supports auto keystone correction
    Optoma PH31 corrects keystone distortion automatically, while the average projector does not. 36.9% of projectors offer this.
  • 10,000 hours longer lamp life
    This projector has a higher lamp life than the average projector (30,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life.
    30,000 hours vs 20,000 hours
  • Supports HLG
    This projector supports HLG, while the average projector does not. 41.2% of projectors support HLG.
  • 4 more recent release
    This projector was released more recently than the average projector (2025 vs 2021). The average projector was released in 2021.
    2,025 vs 2,021
  • 2 dB quieter eco mode
    This projector has a lower audible noise in eco mode than the average projector (26 dB vs 28 dB). The average projector has 28 dB of audible noise in eco mode.
    26 dB vs 28 dB
  • Wider color gamut
    This projector has a higher color gamut coverage than the average projector (95% DCI-P3 % vs 99% Rec.709 %). The average projector has 99% Rec.709 % of color gamut coverage.
    95% DCI-P3 % vs 99% Rec.709 %
  • Higher contrast ratio
    This projector has a higher contrast ratio than the average projector (250000:1 vs 10000:1). The average projector has 10000:1 of contrast ratio.
    250,000:1 vs 10,000:1
  • Supports HLG
    This projector supports HLG, while the average projector does not. 41.2% of projectors support HLG.
  • 4 more recent release
    This projector was released more recently than the average projector (2025 vs 2021). The average projector was released in 2021.
    2,025 vs 2,021
  • Supports curved-surface correction
    This projector corrects warping on curved surfaces, while the average projector does not. 5.5% of projectors offer this.
  • Supports auto keystone correction
    Optoma PH31 corrects keystone distortion automatically, while the average projector does not. 36.9% of projectors offer this.
  • 10,000 hours longer lamp life
    This projector has a higher lamp life than the average projector (30,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life.
    30,000 hours vs 20,000 hours
  • 2 dB quieter eco mode
    This projector has a lower audible noise in eco mode than the average projector (26 dB vs 28 dB). The average projector has 28 dB of audible noise in eco mode.
    26 dB vs 28 dB
  • Limited HDMI format
    This projector supports a less capable max HDMI input format than the average projector (4K/30Hz vs 4K/120Hz). The average projector supports a max HDMI input format of 4K/120Hz.
    4K/30Hz vs 4K/120Hz
  • 1 fewer HDMI ports
    This projector has fewer HDMI ports than the average projector (1 vs 2). The average projector has 2 HDMI ports.
    1 vs 2
  • Basic light source
    This projector has Basic light source than the average projector (led vs laser). The average projector uses a laser light source.
    led vs laser
  • 43.3% lower HDMI bandwidth
    This projector has a lower HDMI bandwidth than the average projector (10.2 Gbps vs 18 Gbps). The average projector has 18 Gbps of HDMI bandwidth.
    10.2 Gbps vs 18 Gbps
  • 39.8 ms higher input lag
    This projector has a higher input lag than the average projector (66.8 ms vs 27 ms). The average projector has 27 ms of input lag.
    66.8 ms vs 27 ms
  • No Wi-Fi connectivity
    This projector does not connect to Wi-Fi networks, while the average projector does. 53.4% of projectors offer this.
  • 0.51 m longer throw distance
    This projector has a higher throw distance than the average projector (1.5 m vs 1 m). The average projector has 1.0055 m of throw distance.
    1.52 m vs 1.0055 m
  • 20.3% lower review score
    Reviews score
    5.9/ 10
    ✕
    What it is
    Average grade from independent test sites, magazines and video reviewers, 1–10.
    How we count it
    Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
    Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
    Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
    Share: Reviews count 25% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–¼ Worse than 86% of models

    5.9

    Mark 7.7 is below the typical mark 8.2 of this category, so it cannot lift the score above the technical score

    80%

    8.1

    Average grade

    20%

    6.1

    Popularity

    Grades by review (2)
    2 video reviews, each counting half as much as a written test. Reviews count 25% of the overall score.
    User ratings collected online are not part of this score.
    5.9 vs 7.4
  • 20.3% lower review score
    Reviews score
    5.9/ 10
    ✕
    What it is
    Average grade from independent test sites, magazines and video reviewers, 1–10.
    How we count it
    Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
    Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
    Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
    Share: Reviews count 25% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–¼ Worse than 86% of models

    5.9

    Mark 7.7 is below the typical mark 8.2 of this category, so it cannot lift the score above the technical score

    80%

    8.1

    Average grade

    20%

    6.1

    Popularity

    Grades by review (2)
    2 video reviews, each counting half as much as a written test. Reviews count 25% of the overall score.
    User ratings collected online are not part of this score.
    5.9 vs 7.4
  • 31.8% dimmer image
    This projector has lower ANSI lumens than the average projector (1,500 vs 2,200). The average projector has 2,200 ANSI lumens.
    1,500 vs 2,200
  • No 3D video
    This projector does not support 3D video, while the average projector does. 55.4% of projectors support 3D video.
  • No 3D glasses support
    This projector does not display 3D with glasses, while the average projector does. 54.4% of projectors offer 3D with glasses.
  • 10.6% lower refresh rate
    This projector has a lower refresh rate than the average projector (76 Hz vs 85 Hz). The average projector has 85 Hz of refresh rate.
    76 Hz vs 85 Hz
  • 0.51 m longer throw distance
    This projector has a higher throw distance than the average projector (1.5 m vs 1 m). The average projector has 1.0055 m of throw distance.
    1.52 m vs 1.0055 m
  • 100 inch smaller image size
    This projector has a lower projection size than the average projector (150 inch vs 250 inch). The average projector has 250 inch of projection size.
    150 inch vs 250 inch
  • 0.2 2x narrower zoom range
    This projector has a lower zoom ratio than the average projector (1.1 vs 1.3). The average projector has 1.3 of zoom ratio.
    1.1 vs 1.3
  • 5 degrees less vertical correction
    This projector offers less vertical keystone correction than the average projector (25 degrees vs 30 degrees). The average projector offers vertical keystone correction of 30 degrees.
    25 degrees vs 30 degrees
  • 5 degrees less horizontal correction
    This projector offers less horizontal keystone correction than the average projector (25 degrees vs 30 degrees). The average projector offers horizontal keystone correction of 30 degrees.
    25 degrees vs 30 degrees
  • Limited HDMI format
    This projector supports a less capable max HDMI input format than the average projector (4K/30Hz vs 4K/120Hz). The average projector supports a max HDMI input format of 4K/120Hz.
    4K/30Hz vs 4K/120Hz
  • 43.3% lower HDMI bandwidth
    This projector has a lower HDMI bandwidth than the average projector (10.2 Gbps vs 18 Gbps). The average projector has 18 Gbps of HDMI bandwidth.
    10.2 Gbps vs 18 Gbps
  • 39.8 ms higher input lag
    This projector has a higher input lag than the average projector (66.8 ms vs 27 ms). The average projector has 27 ms of input lag.
    66.8 ms vs 27 ms
  • Older HDMI version
    This projector has Old HDMI standard than the average projector (1.4 vs 2). The average projector supports HDMI 2.0.
    1.4 vs 2.0
  • More outdated HDCP support
    This projector supports an older HDCP version than the average projector (1.4 vs 2.2).
    1.4 vs 2.2
  • 1 fewer HDMI ports
    This projector has fewer HDMI ports than the average projector (1 vs 2). The average projector has 2 HDMI ports.
    1 vs 2
  • No Wi-Fi connectivity
    This projector does not connect to Wi-Fi networks, while the average projector does. 53.4% of projectors offer this.
  • No Bluetooth connectivity
    This projector does not support Bluetooth, while the average projector does. 50.6% of projectors offer this.
  • No RS-232 control
    This projector does not support RS-232 control, while the average projector does. 50.6% of projectors support RS-232 control.
  • 50% weaker audio output
    This projector has a lower audio output power than the average projector (5 W vs 10 W). The average projector has 10 W of audio output power.
    5 W vs 10 W
  • Basic light source
    This projector has Basic light source than the average projector (led vs laser). The average projector uses a laser light source.
    led vs laser
  • 1 dB louder operation
    This projector has a higher audible noise than the average projector (32 dB vs 31 dB). The average projector has 31 dB of audible noise.
    32 dB vs 31 dB

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

9.0
Jayce Ooi
≈ estimated
30/05/2026
Full review · measurements and gaming tests
Verdict
Optoma PH31 is a budget native Full HD projector with excellent picture quality and good value for the money.
5.0
Warsztat u Igora
≈ estimated
15/01/2026
Hands-on review · image, black level and menu tests
Verdict
Optoma PH31 is sharp and detailed, but grey blacks and a dated menu make it hard to recommend at this price.
Overview video
Overview video
Shop video
Shop video

Third-party reviews

What customers like about Optoma PH31

  • Full HD 1920x1080 resolution gives a clear picture for films.
  • The LED light is rated for 30000 hours.
  • Auto keystone correction straightens the picture quickly.
  • Geometric warping helps fit the image to an uneven wall.
  • Eco mode drops the noise to 26 dB.
  • 10-bit color depth gives smoother shades of color.

What customers don't like about Optoma PH31

  • Input lag of 66.8 ms is too slow for fast games.
  • The projector must sit at least 1.52 m from the wall.
  • 1500 ANSI lumens is too dim for a room with daylight.
  • At normal power the fan is 32 dB, which is audible in a quiet room.
  • There is only one HDMI port, and 4K input works only at 30 Hz.

Verdict

Dim spare rooms and small lounges suit the Optoma PH31, a simple LED projector. Its 1920x1080 picture reaches up to 150 inch with 1500 ANSI lumens, so it works best in a dim room. The LED light is rated for 30000 hours, so bulbs are not a worry. Auto keystone and geometric warping help when the projector sits at an angle to the wall. The 5 W speaker is enough for a quiet room, but a separate speaker will sound better. Input lag of 66.8 ms is too slow for fast games, and the projector must sit at least 1.52 m from the wall. At 2.2 kg it is easy to move. It suits a first-time buyer who wants a simple projector for movies in a bedroom, not for games or big parties.

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