Wedding Carbon Footprint Calculator

Calculate your wedding's total carbon footprint by entering details about guest travel (flights and car trips), food choices, venue energy use, and decorations. You'll get a total CO₂ estimate in kg, broken down by category, so you can see where your biggest impact is and make greener choices.

e.g. Philadelphia to Boston

e.g. Chicago to New York

e.g. Dallas to Seattle

Over 6-hour flights

miles

Beef has the highest carbon footprint of common proteins

hrs

Results

Total Wedding Carbon Footprint

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Travel Emissions

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Food & Catering Emissions

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Venue & Energy Emissions

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Decorations Emissions

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Emissions Per Guest

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Trees Needed to Offset

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Carbon Footprint Breakdown by Category

Frequently Asked Questions

What contributes most to a wedding's carbon footprint?

Guest travel — especially long-haul flights — is typically the single largest source of wedding emissions, often accounting for 50–70% of the total footprint. Food choices (particularly beef) and venue energy use are the next biggest contributors. Cutting even a handful of long-haul flights or swapping beef entrées for plant-based options can make a meaningful difference.

How is wedding carbon footprint measured?

Wedding emissions are measured in kilograms of CO₂ equivalent (kg CO₂e), a standard unit that accounts for all greenhouse gases (CO₂, methane, nitrous oxide, etc.) converted to their equivalent warming effect. This calculator uses widely accepted emission factors for flights, car travel, food types, and energy consumption.

How can I reduce my wedding's carbon footprint?

The most impactful steps are choosing a venue close to where most guests live to minimise long-distance travel, offering plant-based menu options, sourcing local and seasonal flowers, and arranging shuttle buses so fewer individual cars are needed. You can also offset remaining emissions by contributing to verified carbon offset programmes or tree-planting initiatives.

How many trees does it take to offset a wedding?

A single mature tree absorbs roughly 21 kg of CO₂ per year on average. An average wedding produces somewhere between 5 and 30+ metric tons of CO₂e depending on guest numbers and travel patterns, so offsetting a full wedding typically requires planting hundreds of trees over their lifetime — or contributing to faster-acting offset projects like renewable energy or avoided deforestation.

Does the type of food served really matter for emissions?

Yes — significantly. Beef produces roughly 27 kg CO₂e per kg of meat, compared to about 6 kg for chicken and under 3 kg for plant-based proteins. Swapping even half of beef entrées for vegetarian options at a 100-person wedding can reduce food-related emissions by hundreds of kilograms of CO₂e.

Are imported flowers a major source of wedding emissions?

Flowers are a smaller but still meaningful contributor. Imported flowers (especially roses flown in from South America or Africa) carry a significant air-freight footprint. Choosing locally grown, seasonal blooms — or opting for potted plants guests can take home — can cut decoration-related emissions by more than half.

How was this calculator developed?

This calculator draws on emission factors from established life cycle assessment databases, IPCC transport emission data, and food carbon footprint research. It is designed to give you a reliable order-of-magnitude estimate so you can identify your biggest impact areas and make informed choices — not a certified audit, but a practical planning tool.

Can I use this calculator before my wedding to plan greener choices?

Absolutely — that's exactly what it's designed for. By adjusting inputs like guest travel distances, menu choices, and venue type, you can compare different scenarios and see which decisions have the biggest effect on your total footprint before you finalise any bookings.

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