Greenhouse Surface Area Calculator

Calculating the surface area of your greenhouse can be useful for different tasks, for example for picking the right greenhouse heater size. We created this tool to make it easier for you to do the math! Simply choose your greenhouse style, enter some measurements, and hit the “calculate” button.

/* Basic Styling */ .hidden { display: none; } label { font-size: 20px; font-weight: 600; } input { border: 2px solid #e2e2e2 !important; border-radius: 3px !important; } /* Calculator Styling */ #calculatorForm { background-color: #F5F5F5; box-shadow: 0 6px 10px rgba(0, 0, 0, 0.3); border-radius: 30px 0 30px 0; } #calculatorForm input, #calculatorForm select { background-color: #ffffff; } #calculatorForm input { box-sizing: border-box; width: 100px; } /* Mobile Responsive Styling */ @media (max-width: 767px) { #calculatorForm { margin: 0 15px; } } /* Form Input Styles */ #form-input { padding: 40px; } /* Calculate Button Styling */ #calc-button button { width: 100%; text-align: center; border-radius: 0 0 30px 0; padding: 30px 0; border: none; cursor: pointer; background-color: #265C2C; color: white; font-size: 24px; font-weight: 900; } #calc-button input[type=”button”]:hover { background-color: #F2CB05; color: #265C2C; } /* Result Styling */ p#result { text-align: center; font-weight: 900; font-size: 24px; padding: 30px; margin-top: 30px; } .result-value { display: inline-block; background-color: #F29F05; color: #ffffff; font-size: 30px; border-radius: 30px 0 30px 0; border: none; padding: 20px; } /* Error Message Styling */ .error-message { display: block; color: red; font-weight: bold; font-size: 20px; padding: 30px; background-color: #ffe6e6; } /* image Styling */ #greenhouseStyle { display: flex; flex-wrap: nowrap; /* Prevent wrapping to the next line */ overflow-x: auto; /* Enable horizontal scrolling if needed */ justify-content: flex-start; /* Align items to the start */ text-align: center; } .greenhouse-image { cursor: pointer; border: 2px solid transparent; margin: 0; width: auto; max-width: 100%; height: auto; } .selected-figure { border: 5px solid #265C2C; padding: 5px; box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2); /* Example shadow effect */ } .selected-figure img { /* Example: Slightly reduce opacity for selected image */ opacity: 0.9; } .selected-figure figcaption { /* Example: Change caption color for selected image */ } } @media (max-width: 768px) { #greenhouseStyle { flex-wrap: wrap; /* Wrap images to the next line */ } .greenhouse-image { width: calc(50% – 1.1em); /* Same as above for consistency */ margin: 0px; /* Same margin as above */ } } @media (max-width: 480px) { #greenhouseStyle { flex-wrap: wrap; /* Wrap images to the next line */ } .greenhouse-image { width: calc(50% – 1.1em); /* Same as above for consistency */ margin: 0px; /* Same margin as above */ } } figcaption { text-align: center; /* Center align the caption text */ margin-top: 0px; /* Adjust the top margin as needed */ padding-top: 0; /* If needed, adjust the top padding */ }

Surface Area ≈ 0 sq. ft.

var selectedStyle = ”; // Variable to store the selected greenhouse style function selectStyle(style) { selectedStyle = style; toggleInputs(); highlightSelectedImage(style); } function toggleInputs() { document.getElementById(‘quonsetInputs’).style.display = selectedStyle === ‘quonset’ ? ‘block’ : ‘none’; document.getElementById(‘aframeInputs’).style.display = selectedStyle === ‘aframe’ ? ‘block’ : ‘none’; document.getElementById(‘leantoInputs’).style.display = selectedStyle === ‘leanto’ ? ‘block’ : ‘none’; document.getElementById(‘geodesicInputs’).style.display = selectedStyle === ‘geodesic’ ? ‘block’ : ‘none’; } function highlightSelectedImage(style) { var figures = document.querySelectorAll(‘#greenhouseStyle figure’); for (var i = 0; i < figures.length; i++) { figures[i].classList.remove('selected-figure'); } document.querySelector(`#${style}`).closest('figure').classList.add('selected-figure'); } function calculateArea() { const style = selectedStyle; let SA = 0; if (style === 'quonset') { const H = parseFloat(document.getElementById('quonsetHeight').value); const L = parseFloat(document.getElementById('quonsetLength').value); const W = parseFloat(document.getElementById('quonsetWidth').value); const a = W / 2; const b = H; const A = Math.PI * a * b; const C = Math.PI * (3 * (a + b) – Math.sqrt((3 * a + b) * (a + 3 * b))); SA = A + (C/2 * L); } else if (style === 'aframe') { const L = parseFloat(document.getElementById('aframeLength').value); const W = parseFloat(document.getElementById('aframeWidth').value); const H2 = parseFloat(document.getElementById('aframePeakHeight').value) – parseFloat(document.getElementById('aframeSidewallHeight').value); const H1 = parseFloat(document.getElementById('aframeSidewallHeight').value); const endGables = (0.5 * H2 * W) * 2; const roofArea = 2 * L * Math.sqrt(Math.pow(W/2, 2) + Math.pow(H2, 2)); const sideWalls = 2 * W * H1 + 2 * L * H1; SA = endGables + roofArea + sideWalls; } else if (style === 'leanto') { const L = parseFloat(document.getElementById('leantoLength').value); const W = parseFloat(document.getElementById('leantoWidth').value); const H2 = parseFloat(document.getElementById('leantoPeakHeight').value) – parseFloat(document.getElementById('leantoSidewallHeight').value); const H1 = parseFloat(document.getElementById('leantoSidewallHeight').value); const roofArea = L * Math.sqrt(Math.pow(W/2, 2) + Math.pow(H2, 2)); const frontWall = W * parseFloat(document.getElementById('leantoPeakHeight').value); const backWall = W * H1; const sideWalls = 2 * L * H1; SA = roofArea + frontWall + backWall + sideWalls; }// Geodesic Dome Surface Area Calculation else if (style === 'geodesic') { const d = parseFloat(document.getElementById('geodesicDiameter').value); const h = parseFloat(document.getElementById('geodesicHeight').value); const r = d/2; //converts diameter to radius const A = 2 * Math.PI * r * r; // Hemisphere surface area SA = A * (h / r); // Adjusting the surface area based on dome height } document.getElementById('result').querySelector('.result-value').innerText = SA.toFixed(2); document.getElementById('result').classList.remove('hidden'); }

FAQs about the Greenhouse Surface Calculator

If you have trouble using the tool, have a look at this section. If you’re still lost, please send us an email or give us a call.

What does surface area mean?

The surface area is the whole area of your greenhouse exposed to the elements (basically the glazing and framing). This does not include the floor space. So, you’d have to add all sides and roof together in order to get the square footage.

What is a Quonset greenhouse?

A Quonset is a tunnel greenhouse. The gable has a circular shape.

Why don’t you have a gothic-arch greenhouse to select?

If you have a gothic-arch greenhouse, you can use the Quonset greenhouse style because it’s the closest to a gothic arch or onion shape. Keep in mind, your greenhouse surface area will be smaller than the calculation because your gable is smaller than a half circle.

The problem with the onion-shaped greenhouses is the curve that varies for each greenhouse. So the best solution is to utilize the larger Quonset greenhouse as a reference.