Measure Objects on an On-Screen Ruler
How long is this object? A blue bar sits on the ruler. Pick the length in in or cm. 60-Second Rush or Survival, on Easy, Medium, or Hard.
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How to Play Ruler Rush
Start on the Ruler
The round opens on the object. The line says How long is this object? Score sits in the top bar with the timer, or with Lives in Survival.
Read Where the Bar Stops
The blue bar runs from 0 to a tick. Read that number in in or cm. On a long ruler, count from the nearest numbered tick.
Tap the Length
Tap one of the four lengths. ✓ Correct! 📏 raises your Score. ✗ Wrong! shows Answer: and the length. In Survival, a wrong tap costs a Life.
Play Again or Change Settings
Game Over! shows Correct, Wrong, and Accuracy. Play Again keeps the same Game Mode. Settings lets you pick 60-Second Rush or Survival, and Easy, Medium, or Hard, then Start! Beat your Best for a New Best!
Key Features
Read the Bar
How long is this object? A blue bar starts at 0 and stops on a tick. The number under that tick is the length. It is not colored in until you answer.
Four Lengths
Tap a length in in or cm. ✓ Correct! 📏 adds to your Score. ✗ Wrong! shows Answer: with the length, and in Survival it costs a Life.
Easy, Medium, and Hard
Easy: Small objects, inches only (1–6 in). Medium: Larger objects, inches or centimeters (1–12). Hard: Mixed units, bigger range (1–20 cm / 1–8 in). Change them in Settings, then press Start!
60-Second Rush and Survival
60-Second Rush: Measure as many objects as you can in 60 seconds. Survival: 3 lives — wrong answer loses a life. The gear opens Settings. Best is saved for each Game Mode.
What is Ruler Rush?
Ruler Rush asks How long is this object? A blue bar lies on the ruler, and you tap the length in in or cm. Easy is inches only. Medium and Hard add centimeters. Play 60-Second Rush or Survival. Settings is behind the gear, and Start! begins a new Best.
Why Play Ruler Rush?
Builds Practical Measurement Skills
How long is this object? is the whole round. The blue bar and the ticks train you to read a ruler, then you tap the length.
Introduces Two Unit Systems
Easy stays on in. Medium and Hard mix in and cm, so the unit on the button has to match the ruler.
The Bar Stops on a Tick
The blue bar runs from 0. You read the tick where it stops, then tap that length.
60-Second Rush or Survival
60-Second Rush races the clock. Survival gives you 3 lives — wrong answer loses a life. Settings keeps a Best for each Game Mode.
Frequently Asked Questions
What units does the game use?
Easy is inches only, shown as in. Medium and Hard can use in or cm. The unit is on the object and on each length button.
Are measurements always whole numbers?
Yes! All measurements are whole numbers (no fractions or decimals), making the game accessible for young learners who are just starting to use rulers.
What objects appear in the game?
The game features 18 fun everyday objects including pencils, crayons, keys, spoons, leaves, bananas, fish, feathers, paperclips, and more — each shown as an emoji icon.
Can I use keyboard shortcuts?
Yes. Press 1, 2, 3, or 4 to tap the matching length. ✓ Correct! 📏 or ✗ Wrong! appears the same way.
What age is this game for?
Designed for grades 1–3 (ages 6–9). Easy mode works for first graders learning to read a ruler. Hard mode challenges older students with two unit systems and larger numbers.