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Teklif Atölyesi
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Channel letter sign calculator

Enter the sign text, letter height and return depth; see the surfaces, the LED need and an estimated price, with the formula for every line.

Calculated in your browser; the numbers you enter are never sent anywhere.

11 letters (spaces not counted)

cm
cm
Unit prices
$/m²
$/m²
$/m²
$
%
Assumptions
%
%
×
/m²
W
Estimated price
$284.80
excl. VAT
Price per sign m²
$197.78
sign area ⁦1.440 m²⁩
LED modules
121
87.12 W; power supply at least 109 W
Sign size
360 × 40 cm
11 letters (spaces not counted)

How it was calculated

Face
40 cm × 28 cm × 45% = ⁦0.0504 m²⁩ per letter; 11 letters → ⁦0.554 m²⁩
Returns
40 cm × 3.5 × 8 cm = ⁦0.1120 m²⁩ per letter; 11 letters → ⁦1.232 m²⁩
LED modules
⁦0.0504 m²⁩ × 200 = 11 modules per letter (rounded up); 11 letters → 121 modules
Power and supply
121 × 0.72 W = 87.12 W; power supply at least 87.12 W × 1.25 = 109 W
Sign size
letters + letter gaps (10%) + word gaps (40%) = 360 × 40 cm = ⁦1.440 m²⁩
Cost and price
Face⁦0.554 m²⁩ × $45.00$24.93
Back⁦0.554 m²⁩ × $20.00$11.08
Returns⁦1.232 m²⁩ × $55.00$67.76
LED modules121 × $0.45$54.45
Materials total$158.22
Labour, overhead and profit$158.22 × 80%$126.58
Estimated price$284.80

This is an estimate: the letter shape (font, serif, script) changes the surface and the LED count. For exact figures, measure the cut paths and areas from the design file. Installation, structure and transport are not included.

How is it calculated?

The cost of a channel letter comes from its surfaces: the face (usually opal acrylic), the return (aluminium or stainless strip) and the back. Face = letter height × letter width × fill; fill is how much of the letter’s bounding box the letter covers (40–50% for a plain typeface).

Return = letter perimeter × depth. A letter’s perimeter is roughly 3–4 times its height (I is short, M and W are long); adjust the factor for your letters.

LED modules = face area × density, rounded up per letter. The power supply should be at least 25% above the total load: a supply running at full load heats up and fails early.

Teklif Atölyesi runs the same calculation in your sign recipe: acrylic and strip prices come from your catalogue, and the quote goes to the customer with your labour times and margin rules through a single link.

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