View Cart
View Cart
" title="
We know home theater - 26th Anniversary
Questions? 1-888-764-9273
We know home theater - 26th Anniversary
Questions? CALL TOLL FREE 1-888-764-9273
Visit Our Showroomht rewards programHTDesign Gallery

Home Theater Caclulators



HTmarket Home Theater Calculators
HTmarket Planning Tools

Home Theater Calculators

Use these calculators to plan screen viewing distance, rear-row riser height, and home theater carpet order length for 12 ft and 13.5 ft carpet rolls.

Viewing Distance Calculator

Plan TV and projector seating based on screen size, aspect ratio, viewing angle, and room layout.

Home Theater Planning Tool

TV & Projector Viewing Distance Calculator

Find the right screen size for your seating distance, or the right seating distance for your screen.

Call 1-888-764-9273
Use the advertised diagonal size, such as 85 for a TV or 120 for a projector screen.
Projector recommendation
120" projector screen: sit about 10.3 ft away
This is the cinema-style sweet spot for a dedicated theater. Move farther back for casual TV, closer for maximum immersion.
Screen width
104.6"
58.8" high
Best seat
10.3 ft
36° cinematic field of view
Comfort range
8.7-12.9 ft
immersive to relaxed

Immersive

8.7 ft
Approx. 40° field of view.

Cinematic

10.3 ft
Approx. 36° field of view.

Comfortable

12.9 ft
Approx. 30° field of view.

Planning notes

    Calculations assume a flat screen and use screen width plus viewing angle geometry. Treat results as a planning range, not a hard rule.
    Need help matching seats, risers, screen size, and projector placement?
    HTmarket can help plan a complete room around your seating distance, rows, and screen wall.
    Shop HTmarket

    Home Theater Riser Calculator

    Estimate the riser height needed for a rear row to see over the front row toward the screen.

    Home Theater Planning Tool

    Home Theater Riser Calculator

    Estimate the platform height needed for a rear row to see over the front row toward the bottom of the screen.

    Inches from floor to bottom of visible screen.
    Seated front-row obstruction height.
    Seated rear-row eye height before adding platform.
    Horizontal distance in inches.
    Usually front-row eyes to back-row eyes spacing.
    Use spacing if D2 is the distance behind front row.
    Optional extra inches above the front-row head. Use 0 to match the basic formula; 2-4 inches is more conservative.
    Formula:
    V1 = H1 - S
    R = V1 / D1
    Back row screen distance = D1 + D2, unless D2 is already screen-to-back-row distance
    V2 = R x back row screen distance
    E2 = V2 + S + clearance
    Riser height = E2 - E1
    Riser recommendation
    Recommended riser height: 5"
    Result is rounded up to the nearest half inch. Verify room layout before construction.
    Recommended riser
    5"
    rounded up
    Raw riser
    4.94"
    E2 - E1
    Back row distance
    240"
    used in calculation
    V1
    12"
    H1 - S
    R
    0.07059
    V1 / D1
    E2
    44.94"
    required rear eye height
    V2
    16.94"
    rear vertical rise
    Screen bottom
    28"
    default S
    Default example
    5"
    using D1 + D2

    Calculation notes

    • V1 = H1 - S = 40" - 28" = 12".
    • R = V1 / D1 = 12" / 170" = 0.07059.
    • Back row screen distance = D1 + D2 = 170" + 70" = 240".
    • V2 = R x back row screen distance = 16.94".
    • E2 = V2 + S = 44.94".
    • Riser height = E2 - E1 = 4.94", rounded up to 5".
    Planning a multi-row theater?
    HTmarket can help match riser height, row spacing, recline depth, and home theater seating.
    Shop HTmarket

    Home Theater Carpet Sizing Calculator

    Enter room dimensions to compare order length for 12 ft and 13.5 ft wide carpet, including waste allowance and pattern repeat.

    HTmarket Home Theater Carpet Sizing Calculator header
    Feet in first box, inches in second box.
    Measure the longest finished room dimensions.
    Enter repeat in inches. Use 0 for non-patterned carpet.
    Best linear-foot option
    13.5 ft roll
    15' wide x 20' long | 300 sq ft room area
    No pattern repeat entered

    12 ft Wide Carpet

    Order length
    32'
    32 linear ft
    Pieces2 pieces
    Seams1 seam
    Best layoutRotate carpet crosswise
    Cut length15\' per piece
    Pattern add-onNo pattern-repeat add-on
    Carpet ordered384 sq ft
    Extra area84 sq ft over room area
    Estimated costAdd price/linear ft for estimate
    Confirm seam placement and carpet direction before ordering.

    13.5 ft Wide Carpet

    Order length
    32'
    32 linear ft
    Pieces2 pieces
    Seams1 seam
    Best layoutRotate carpet crosswise
    Cut length15\' per piece
    Pattern add-onNo pattern-repeat add-on
    Carpet ordered432 sq ft
    Extra area132 sq ft over room area
    Estimated costAdd price/linear ft for estimate
    Confirm seam placement and carpet direction before ordering.

    How this calculator works

      Need help planning home theater carpet?
      HTmarket can help compare roll widths, seams, and order length before you buy.
      Shop HTmarket


      Navigation

      Our Store

      © 2000-2026 HTmarket.com All rights reserved.
      Click to verify BBB accreditation and to see a BBB report.We Proudly Accept Visa, MasterCard, American Express, Discover and PayPal!