Menu Prices AUNutrition Calculator — kJ to Calories
Approximate figures only, built on the same menu data as the menu pages. The average adult daily energy intake is 8,700 kJ.
1 · Nutrition Calculator — kJ ⇄ Calories
How the nutrition calculator works
Type a kilojoule figure into the Kiljoules box and the calculator divides it by 4.184 to give calories, then shows what share of the 8,700 kJ average adult day that figure is. Type calories instead and it multiplies by 4.184 to give kilojoules. The two boxes stay in step: change one and the other updates at once, so you can work in whichever unit the menu in front of you uses.
Kilojoules vs calories
Australian menus and nutrition panels list energy in kilojoules, while many recipes and fitness apps talk in calories. They measure the same thing: one calorie (kcal) equals 4.184 kJ, so 1,000 kJ is 239 calories and 239 calories is 1,000 kJ. A kilojoule is the smaller unit, which is why the kJ number always looks bigger — a Big Mac at 2,330 kJ is the same energy as 557 calories. The 8,700 kJ day is the average adult daily intake printed on Australian nutrition labels; a single meal is usually somewhere between a quarter and a half of it.
Try it with real menu items
The figures below are the published figures from the menus on this site. Type any of them into the calculator and check the answer against the one given here.
- Zinger Burger (KFC) — 1,874 kJ = 448 cal, 22% of a day.
- Big Mac (McDonald’s) — 2,330 kJ = 557 cal, 27% of a day.
- Hamburger (McDonald’s) — 1,050 kJ = 251 cal, 12% of a day.
- Chicken McNuggets 6pc (McDonald’s) — 1,040 kJ = 249 cal, 12% of a day.
- Regular Chips (KFC) — 1,186 kJ = 283 cal, 14% of a day.
A worked example
Take a Zinger Burger with Regular Chips. The burger is 1,874 kJ and the chips are 1,186 kJ, so the pair comes to 3,060 kJ. Type 3060 into the kilojoules box: the calculator gives 731 calories, which is 35% of the 8,700 kJ day. Add a drink and the share climbs — that is the point of the tool. It does not judge the meal; it shows what share of a day it is, so you can decide whether the rest of the day should be lighter.
The calculator converts the number you type, nothing else. It does not look up a dish for you — pick the dish on its menu page, copy the kJ figure from the price card, and type it here. Prices and kJ are pickup figures from each chain’s official Australian ordering site; prices vary by location and delivery prices are higher than pickup, so confirm the total in the chain’s app before you order.
Frequently Asked Questions
How do I convert kJ to calories?
Type the kJ figure and the converter divides by 4.184 — 1 calorie (kcal) equals 4.184 kJ. 1,000 kJ is 239 calories.
What is 8,700 kJ?
The average adult daily energy intake used on this site. The converter shows what share of that day your figure is — 1,000 kJ is about 11% of a day.
Are the figures on this page official?
The conversion factor is exact (4.184). Any dish price or kJ you type in comes from the menus; a figure marked ≈ is one the chain does not list, worked out from the basis stated on the dish page.
Can I convert calories back to kJ?
Yes — type the calories and the converter multiplies by 4.184. The same converter box works both ways — type in either box and the other updates.
Do prices vary by store?
Yes — franchise stores set their own prices, so the figures here are pickup prices from the menus. Your local store can differ slightly, and delivery prices are higher than pickup.
Where do this tool’s figures come from?
From the live menu data on this site — 1,529 menu entries across the Top 10 chains. Where the chain publishes no figure, the tool shows a figure marked ≈ with its basis stated.
Written & checked by Sophie Bernard
Sophie reads every menu directly from each chain’s official Australian ordering site and records the store and price basis on the page. No price is published without a source.