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Clock Reading Practice Calculator

Work out clock reading practice instantly with clear inputs, formula shown and shareable results.

About Clock Reading Practice Calculator

The minute hand moves 6 degrees a minute and the hour hand 0.5 degrees a minute, so the angle between them is the difference of those two positions folded to at most 180 degrees. Analogue reading clicks when a child links the spoken phrase, the digital time and the physical hand positions, so all three are shown together.

Formulas

Hand positions

hour hand = 30 x hour + 0.5 x minutes; minute hand = 6 x minutes (degrees clockwise from 12)

Angle between

angle = |hour angle - minute angle|, and 360 - that value if it exceeds 180

Worked example

With the default values below, Clock Reading Practice Calculator returns Read aloud as of 20 to 4. Change any input above and every figure here is recalculated in your browser.

Inputs used

Hour hand ataccepts 1–12
3
Minutes pastaccepts 0–59
40

Results

Read aloud as
20 to 4
Digital form
3:40
Angle between the hands
130.00 deg
Minutes to the next hour
20

Step by step

  1. 1Values used
  2. 2Hand positions
  3. 3Angle between
  4. 4Read aloud as= 20 to 4
  5. 5Digital form= 3:40
  6. 6Angle between the hands= 130.00 deg
  7. 7Minutes to the next hour= 20

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Clock Reading Practice figure worked out?

hour hand = 30 x hour + 0.5 x minutes; minute hand = 6 x minutes (degrees clockwise from 12). The minute hand moves 6 degrees a minute and the hour hand 0.5 degrees a minute, so the angle between them is the difference of those two positions folded to at most 180 degrees.

Why does this matter?

Analogue reading clicks when a child links the spoken phrase, the digital time and the physical hand positions, so all three are shown together.

What do I need to enter?

Enter hour hand at, minutes past. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.

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