Yong Jae Lee
May 11, 2026 Β· 10 min read
Written and reviewed by Yong Jae Lee Β· Content follows Australian Dietary Guidelines
A five-year-old Foundation/Prep starter and an eleven-year-old Year 7 do not eat the same lunch β but most lunchbox advice treats them as one category. This guide breaks down NHMRC portion sizes by school year, with concrete lunchbox examples.
My older kid started Year 4 in February. My younger one started Foundation in the same week. The morning of the first day I packed two identical-looking lunchboxes. The Year 4 came home empty. The Foundation came home with three quarters of the wrap untouched and a note from the teacher: "She told me she was full after two bites."
That afternoon I went looking for Australian-specific portion guidance for school-age children. The relevant material is in the NHMRC Australian Dietary Guidelines, the Australian Guide to Healthy Eating, and the Heart Foundation Australia children's nutrition resources.
Why Year Level Matters More Than Age Alone
Australian school terminology varies by state (Foundation in VIC, Prep in QLD/TAS, Kindergarten in NSW/ACT, Pre-primary in WA, Reception in SA). Mapping onto NHMRC age bands:
| Australian School Year | Approximate age | NHMRC age band |
|---|---|---|
| Foundation / Prep / Kindy | 5β6 years | 4β8 years |
| Year 1β2 | 6β8 years | 4β8 years |
| Year 3β4 | 8β10 years | 4β8 years (transitioning) |
| Year 5β6 | 10β12 years | 9β11 years |
| Year 7β8 | 12β14 years | 12β13 years |
| Year 9β10 | 14β16 years | 14β18 years |
| Year 11β12 | 16β18 years | 14β18 years |
Portion needs roughly double from Foundation to Year 12.
The Five Food Groups (Australian Framework)
1. Vegetables and legumes/beans
2. Fruit
3. Grain (cereal) foods (wholegrain preferred)
4. Milk, yoghurt, cheese
5. Lean meats, poultry, fish, eggs, nuts, seeds, legumes
Foundation / Year 1β2 (ages 5β7)
| Food group | Daily serves | Lunchbox target |
|---|---|---|
| Vegetables | 4.5 serves | 1 small serve |
| Fruit | 1.5 serves | 1 small piece |
| Grain foods | 4 serves | 1.5β2 small serves |
| Dairy | 1.5β2 serves | 1 small serve |
| Protein | 1.5 serves | About half a serve |
Year 3β4
60β70% of an adult lunchbox.
Year 5β6
Many children's appetites jump noticeably. Move to a full adult-sized lunchbox.
Year 7β8
Daily energy requirements can reach 2200β2600 kcal/day.
Year 9+
Essentially an adult meal plus a snack.
Visual Portion Guide
Child's hand as a measuring tool (Heart Foundation Australia)
| Item | Visual size |
|---|---|
| Protein | Their palm |
| Carbohydrate | Their cupped hand |
| Vegetables | Two cupped hands (raw) or one cupped hand (cooked) |
| Fat | Their thumb tip |
Lunchbox volume rule
| Year level | Lunchbox volume |
|---|---|
| Foundation / Year 1 | ~500ml |
| Year 2β4 | ~700β800ml |
| Year 5β6 | ~900β1000ml |
| Year 7β8 | ~1000β1200ml |
| Year 9+ | 1200ml+ |
Example Lunchboxes
Foundation (5 years old)
Estimated 350β400 kcal.
Year 4 (8 years old)
Estimated 550β650 kcal.
Year 7 (12 years old)
Estimated 750β900 kcal.
Year 11 (16 years old)
Estimated 900β1100 kcal. Often supplemented from canteen.
Common Mistakes
Sending too much to Foundation
An over-full lunchbox signals overwhelming. Send less, but make it finishable.
Not scaling up at Year 5
Lunchbox often stays Year 3-sized while the child's body grows. Hunger by 3pm.
Picky Eaters
NHMRC guidance on picky eating recommends:
1. Repeat exposure β 10β15 times before acceptance
2. No bargaining or rewards
3. Let them pack the lunchbox from Year 3
4. Talk to your GP or APD if intake is genuinely concerning
Quick Year-Specific Audit
References
Informational only β not personalised dietary advice. For specific concerns, consult your GP, paediatrician, or an Accredited Practising Dietitian.
Plan Lunches That Match Your Child's Year Level
The Aussie Lunchbox Planner lets you set portion size by school year and auto-scales the weekly menu to match.
References & Sources
About this article
This article was written and reviewed by Yong Jae Lee, a Senior Product Designer based in Australia. Aussie Lunchbox is a solo project β every article is researched, tested at home with my own kids, and aligned with Australian Dietary Guidelines. If you spot an error or have a suggestion, please contact us.