Slide a quantity onto a log-scaled meter where every band is ×10 — the band is its power of ten, the spot inside the band its leading digit — then stretch a bracket between two quantities to read how many times bigger one is.
A horizontal log meter with one band per power of ten: drag the flag onto it and the band gives the exponent while the log-spaced sub-ticks give the single leading digit, so 37,000,000 becomes 4 × 10⁷ by placement rather than by formula. Compare mode stretches a bracket from quantity B up to quantity A and its length in bands is the 'how many times as much'; Fermi mode hides the number entirely and asks for the band of real quantities such as seconds in a year or the width of a hair, accepting ±1 band and revealing the working. It drills 8.EE.3 estimation and comparison, not notation conversion, and targets the misconception that 10⁹ is 'about three times' 10³. Best for Grades 7–8.
A free, no-signup, no-ads math game for Grade 8 — practising powers-of-ten, estimation, scientific-notation. Play in your browser on the KidsDoMath games hub or explore more Arithmetic games.
By grade level: 8th Grade Math Games
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What math does Magnitude Meter practice? Magnitude Meter practices Powers of Ten, Estimation, Scientific Notation. A horizontal log meter with one band per power of ten: drag the flag onto it and the band gives the exponent while the log-spaced sub-ticks give the single leading digit, so 37,000,000 becomes 4 × 10⁷ by placement rather than by formula.
What grade is Magnitude Meter for? Magnitude Meter is built for Grade 8 (ages 13–14). It sits in the Arithmetic strand, and it ramps across 8 levels so younger or older players find their own pace.
How do you play Magnitude Meter? Slide a quantity onto a log-scaled meter where every band is ×10 — the band is its power of ten, the spot inside the band its leading digit — then stretch a bracket between two quantities to read how many times bigger one is.
Is Magnitude Meter free to play? Yes. Magnitude Meter is free, with no ads and no sign-up, and it runs in the browser on a phone, tablet or computer.