Measuring Tools (tape/level)
Calculate Measuring Tools (tape/level) instantly with the exact formula and a worked example.
Measuring Tools (tape/level)
Measured lengthm
Tape measure accuracy class (1 = I, 2 = II, 3 = III)
Maximum permissible error of the tape, ±
1.3mm
L used (rounded up to whole metre)
5m
Coefficients a and b
0.3 + 0.2·L
Relative error of the tape
0.026%
More about: Measuring Tools (tape/level)
What it calculates
The “Measuring Tools (tape/level)” calculator computes Maximum permissible error of the tape, ± in mm from 2 parameters: measured length (m), tape measure accuracy class (1 = i, 2 = ii, 3 = iii).
Used in design, material estimation, and structural calculations.
Example calculation
With parameters Measured length = 5 m, Tape measure accuracy class (1 = I, 2 = II, 3 = III) = 2 the result is 1.3 mm (Directive 2014/32/EU (MID), MI-008: MPE = ±(a + b·L), L = length rounded up to the next whole metre).
How to use
- Enter measured length and tape measure accuracy class (1 = i, 2 = ii, 3 = iii) — each field above is adjustable with a slider.
- Maximum permissible error of the tape, ± (mm) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Measuring Tools (tape/level) calculated?
The Measuring Tools (tape/level) calculator computes Maximum permissible error of the tape, ± (in mm) from measured length, tape measure accuracy class (1 = i, 2 = ii, 3 = iii). Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Measuring Tools (tape/level) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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