How Many kWh Are in a Big Mac? 17 Everyday Energy Comparisons That Will Rewire Your Brain
May 19, 2026 · 7 min read · Energy Literacy
Most people can tell you the price of a Big Mac, the price of a kWh of electricity and the price of a litre of gasoline. Almost nobody can tell you that all three are roughly the same amount of energy.
That single blind spot is why your gas bill, your grocery bill and your electricity bill all feel like separate problems. They aren't. They're the same currency, just paid in different bills.
Here are 17 everyday energies on one ruler — kilowatt-hours (kWh) — so you can finally compare them directly. Numbers are rounded; the point is the order of magnitude, not the third decimal.
The ruler: 1 kWh ≈ 860 kcal ≈ 3.6 million joules
Memorize that line and the rest of this article writes itself.
Food
| Thing | Energy | |---|---| | 🍌 1 banana | ~0.12 kWh (~105 kcal) | | 🍞 1 slice of bread | ~0.09 kWh (~80 kcal) | | 🥑 1 avocado | ~0.28 kWh (~240 kcal) | | 🍔 1 Big Mac | ~0.65 kWh (~563 kcal) | | 🍕 1 large pizza | ~2.9 kWh (~2,500 kcal) | | 🍽️ Daily adult food intake | ~2.3 kWh (~2,000 kcal) |
A Big Mac is 0.65 kWh of stored chemical energy. Hold that number — we're about to do violence to your intuitions with it.
Personal electronics
| Thing | Energy | |---|---| | 📱 1 phone charge | ~0.015 kWh | | 💻 1 hour of laptop use | ~0.05 kWh | | 📺 1 movie on a 55" TV | ~0.2 kWh | | 🎮 4 hours of console gaming | ~0.6 kWh |
The first jaw-dropper:
A single Big Mac contains roughly as much energy as charging your phone 43 times. Your lunch is a power bank you can eat.
Home
| Thing | Energy | |---|---| | 🫖 Boil 1 L of water (kettle) | ~0.093 kWh | | 🚿 10-minute hot shower | ~4 kWh | | 🏠 Daily electricity, average home | ~10 kWh | | ❄️ Running a fridge for a day | ~1.5 kWh |
The second one:
A 10-minute hot shower uses ~6 Big Macs of energy. Heating water is the most expensive thing most people do every day without noticing.
Movement
| Thing | Energy | |---|---| | 🚶 Walking 1 km | ~0.07 kWh | | 🏃 Running a marathon (42 km) | ~3 kWh | | 🚗 Driving 1 km in an EV | ~0.18 kWh | | ⛽ 1 L of gasoline (combusted) | ~9.7 kWh | | ✈️ 1 hour of flight per passenger | ~30 kWh |
And the one that explains the entire 20th century:
1 litre of gasoline ≈ a full day of human food (≈ 15 Big Macs). Gasoline is calorically preposterous. It's why we built civilization on it — and why moving off it is hard.
Production
| Thing | Energy | |---|---| | ☀️ 1 m² of solar panel, 1 sunny day | ~1.5 kWh | | 🪟 1 typical rooftop solar array, 1 sunny day | ~30 kWh | | 🔋 1 full Tesla Powerwall | ~13.5 kWh | | 🌬️ 1 small home wind turbine, daily | ~5 kWh |
1 day of sunshine on a typical rooftop produces enough energy to feed 13 humans for a day — at zero marginal cost, forever, once the panels are paid off.
This is the entire pitch for why energy is the next great democratization in one row of a table.
Decisions this changes
Once you can convert food, fuel, batteries and bills into the same unit, weird optimizations open up:
- EV vs. ICE in calories. Driving 100 km in an efficient EV uses about 18 kWh. The same distance on gasoline burns ~7 L ≈ 68 kWh. The EV is ~4× more efficient at the same job. You don't need a subsidy argument; the physics already won.
- Diet vs. utility bill. A household of 4 eats ~9 kWh of food per day. That's roughly the same as the household's electricity. Yet most people obsess over the electricity bill and ignore food waste, which throws out energy at the same scale.
- Battery sizing. A typical home uses 10 kWh of electricity a day. A Powerwall (13.5 kWh) covers ~1 day of outage. Two Powerwalls + a sunny roof = effectively infinite runtime in summer. The math is no longer mysterious.
- The "100 % renewable" question. A typical car burns the equivalent of ~150 Big Macs per hour on the highway. That's why electrifying transport is hard but doable, and why electrifying aviation (~30 kWh per passenger per hour) is hard and not yet doable at scale.
Try your own numbers
Pick any value in this article, drop it into the free Energy Unit Converter at masterenergy.online, and switch between kWh, kcal and joules. The visual bar will line your value up next to all of these references at once — banana, phone charge, Big Mac, kettle, EV, tank of gas. You'll spot at least one comparison that breaks an old assumption.
If this rewired one thing, the deeper version of the argument is in The Energy Unit Mess — And How to Actually Feel a Joule. And the next post in this thread looks at the cheapest, dumbest, most underrated storage tech on earth: a bucket of hot sand.
TL;DR
- 1 kWh ≈ 860 kcal ≈ 3.6 million joules. That's the whole game.
- A Big Mac (~0.65 kWh) ≈ 43 phone charges.
- A 10-minute hot shower ≈ 6 Big Macs.
- 1 L of gasoline ≈ 1 day of human food.
- 1 sunny day on your roof ≈ 13 humans fed.
- Play with the numbers at masterenergy.online/tools.