ATPL theory exams · subject difficulty · 031

Is Mass & Balance (031) Hard? And Can You Memorise It?

One of the smallest syllabi — but a pure technique exam. Easy to pass well if you practise the calculations; easy to fail if you only read about them.

Last updated 17 August 2026

Practise Mass & Balance questions Full Mass & Balance syllabus guide

Exam

25 questions

In 60 minutes, at the standard 75% pass mark.

Study load

lower end

Of the rough 40–80 h/subject planning range — it is a range, not a promise.

Sit alongside

See pairing

Affinity guidance below — matched to our in-app planner.

Flashcards in the exam

Permitted*

*At Austro Control — see the note below.

What Mass & Balance (031) actually covers

Aircraft weighing, CG calculations, load sheets, forward and aft limits, loading, zero fuel mass, and maximum take-off and landing mass.

At 25 questions in 60 minutes it is the smallest exam in the set — nearly every mark is a worked calculation.

For the full topic-by-topic syllabus breakdown, see the Mass & Balance subject guide.

Typical study hours — honestly

Any single number here would be false precision, so we won’t give one. As a rough planning figure, most self-study candidates allocate 40–80 hours per subject, and students report Mass & Balance typically sitting toward the lower end of that range. The smallest exam in the set with a tight, self-contained syllabus — the hours go into calculation practice, not reading.

Your own figure depends on background, maths comfort and whether you are studying full-time — treat the range as a budget to adjust, not a target to hit.

Memorise vs understand: where Mass & Balance really sits

There is almost nothing to memorise beyond a handful of definitions and the method. You cannot memorise your way through Mass & Balance: the numbers change, the method does not. Every hour spent doing full load-sheet problems is worth several hours of reading.

Common traps that cost marks

▸Unit and datum errors — mixing arms and moments, or index units — which quietly wreck an otherwise correct method.

▸Time pressure from doing calculations longhand instead of having a drilled, repeatable layout.

Which subjects to sit alongside it

Sit Mass & Balance with Performance (032) — they are the natural calculation pair, working from the same aircraft data and limitations. Both also feed Flight Planning (033), so this pair comes before 033.

How the pairings fit into a full plan — and why order matters — is covered in the recommended order of study, with the sitting mechanics in sittings & limits.

The detail nobody mentions

Austro Control permits flashcards in the Mass & Balance (031) exam — per Austro Control’s own FAQ, flashcards are allowed in subjects 031, 032, 033, 034 and 061. If you are sitting with Austro Control, building a clean flashcard set for this subject is study time that walks into the exam room with you. Other authorities set their own rules — confirm before assuming.

Important: Exam question counts and durations are set per authority and periodically revised, and difficulty reports are exactly that — student reports, not guarantees. Confirm current exam details with your ATO and authority before planning.

Frequently asked questions

Is EASA ATPL Mass & Balance (031) hard?

One of the smallest syllabi — but a pure technique exam. Easy to pass well if you practise the calculations; easy to fail if you only read about them.

Can you just memorise Mass & Balance for the ATPL exam?

How long does it take to study ATPL Mass & Balance?

It is a range, and it genuinely varies by background — as a rough planning figure, most self-study candidates allocate 40–80 hours per subject, and students report Mass & Balance typically sits toward the lower end of that range. The smallest exam in the set with a tight, self-contained syllabus — the hours go into calculation practice, not reading.

Which subjects should I sit alongside Mass & Balance?

The other 12 subjects

010Is Air Law hard?021Is Aircraft General Knowledge hard?022Is Instrumentation hard?032Is Performance hard?033Is Flight Planning & Monitoring hard?040Is Human Performance & Limitations hard?050Is Meteorology hard?061Is General Navigation hard?062Is Radio Navigation hard?070Is Operational Procedures hard?081Is Principles of Flight hard?090Is Communications hard?

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