math calculator

Interquartile Range Calculator

When you need quick formula verification before copying a result into notes around interquartile range.

Important Use Notice

Informational calculator only. Verify important outputs independently before legal, tax, medical, engineering, safety-critical, contractual, employment, or compliance use.

Estimate

Enter job values, review the estimate, then use the decision hints before ordering or quoting.

Estimate Results

Enter values to see the result.

Example

Value 1 8, Value 2 12, Value 3 14, Value 4 19, Value 5 24 gives Interquartile Range 7. 00.

Formula

IQR = Q3 - Q1

With five values, the second and fourth sorted observations act as simple lower and upper quartiles.

This page uses the five-value classroom convention.

Check

Rounding an intermediate value too early when the output feeds another step.
Confirm that all inputs use the same unit system expected by the formula.

Next Step

Next Calc

Range Calculator

Keep range calculator math tidy when a plan, worksheet, or note set needs one quick calculation.

Next Calc

Arithmetic Mean of Four Values Calculator

Next: arithmetic mean of four values.

Next Calc

Coefficient of Variation Calculator

Next: coefficient of variation.

FAQ

How much rounding is safe here? for interquartile range?

Keep more decimals whenever this result will be reused in another formula, drawing step, or comparison instead of being rounded once at the end.

Why is this kind of calculator safer to publish than finance or tax pages? for interquartile range?

Because the calculation rests on fixed math rather than changing legal, medical, tax, financial, or live-data inputs.