What Maths and Physics Level Does the DLR Test Require?

Maths and physics show up in the DLR test in two places: as a knowledge test (in some procedures) and as the computer-based KRN (mental arithmetic) module, which is mainly about calculation speed under time pressure. According to experience reports, the level sits roughly between lower and upper secondary school.

What topics come up?

Topics that experience reports and overviews mention include basic mechanics and electricity formulas (such as F = ma, U = RI, p = F/A), percentage calculations, unit conversions, and speed/time/distance problems. For the broader technical-comprehension side of physics, there's also a separate knowledge module, TVT — more in our TVT article and our PHY article.

Mental arithmetic (KRN) as its own module

KRN is a computer-based performance test where you solve calculations under time pressure — it's less about complex maths and more about speed and accuracy with basic arithmetic. Details and practice examples are in our KRN article.

Does it vary by procedure?

Whether — and how extensively — maths and physics are tested as standalone knowledge questions differs by procedure, whether that's the Lufthansa/EFA screening, the DLR Pilot Certificate, or the SWISS/EFA Switzerland route. The mental-arithmetic module (KRN), on the other hand, tends to be used more broadly. For an overview of all modules, see our question on test content.

TipBefore the test, revise basic mechanics and electricity formulas plus percentage and ratio calculations — without a calculator, but with a feel for timing.

How to prepare sensibly

As a rough experience-based figure, preparation overall is often quoted at around 2–3 months with 20–45 minutes of daily practice — and that covers all test areas together, not just maths and physics. For mental arithmetic specifically, that means regularly running through small sets of calculations without any aids, so basic arithmetic, percentages and simple formula rearrangements become second nature. The DLR Exam Trainer trains the mental-arithmetic module among others, offline and without an account; check the app directly to see which other topics it covers. For more on preparation time overall, see our question on preparation time.

The precise formulas and topics involved can change and aren't officially fixed. Always check the current information from the DLR or the relevant airline/flight school.