Ordinary round-to-nearest for a positive finite rounding unit.
Error Interval Calculator
Enter your values below to get the result first, then scroll for the full explanation and guidance.
Error interval
12.25 <= x < 12.35Rounded to nearest stated unit
Error interval: 12.25 <= x < 12.35 (Rounded to nearest stated unit)
Values from half a rounding unit below the displayed value up to, but not including, half a unit above round to the entered value.
Lower and upper bounds
Values from half a rounding unit below the displayed value up to, but not including, half a unit above round to the entered value.
Result snapshot
A quick visual read of the values behind this result.
Half-unit0.05
Recommended next checks
- →The upper bound is excluded under ordinary round-to-nearest conventions.
- Half-unit
- 0.05
Try different values to compare results.
Find lower-inclusive and upper-exclusive bounds for a value rounded to the nearest stated unit.
Error interval
12.25 <= x < 12.35Rounded to nearest stated unit
Error interval: 12.25 <= x < 12.35 (Rounded to nearest stated unit)
Values from half a rounding unit below the displayed value up to, but not including, half a unit above round to the entered value.
Lower and upper bounds
Values from half a rounding unit below the displayed value up to, but not including, half a unit above round to the entered value.
Result snapshot
A quick visual read of the values behind this result.
Half-unit0.05
Recommended next checks
- →The upper bound is excluded under ordinary round-to-nearest conventions.
- Half-unit
- 0.05
Try different values to compare results.
Table of Contents
Table of Contents
About Error Interval Calculator
Error Interval Calculator helps you work through the main numbers for this topic quickly with a simple input flow and an instant result.
Use the calculator result as a practical starting point, then review the explanation and assumptions on the page if you want more context.
Calculation method
lower = rounded value - unit/2; upper = rounded value + unit/2.
Formula explained
Calculation flow
This calculator is structured for fast UK-focused estimates with clear inputs, repeatable logic, and instant results.
Formula
Input values -> calculation engine -> instant result
How the result is built
1Enter the values requested in the form.
2The calculator applies the configured formula logic.
3The result updates instantly with a breakdown.
4Use the output to compare scenarios quickly.
Example
Example verified by the calculator's measurement bounds reference cases.
Assumptions
- Ordinary round-to-nearest for a positive finite rounding unit.
Source basis
- UK-focused calculator flow
- Structured input validation
- Instant result breakdowns
FAQ
Common questions
Trust and notes
Assumptions and important notes
This calculator is designed to give a fast estimate using the method shown on the page. Results are most useful when your inputs are accurate and the tool matches your situation.
Use the result as guidance rather than a final diagnosis or professional decision. If the result could affect health, legal, financial, or compliance decisions, verify it with a qualified source where appropriate.
- Ordinary round-to-nearest for a positive finite rounding unit.
Method
UK calculator guidance
Last reviewed
April 17, 2026