Last updated: April 2026
A z-score measures how many standard deviations a value is from the mean.
1
84.13%
75 is 1 standard deviations above the mean. 84.13% of values fall below it.
A z-score tells you how far a value is from the mean in standard deviation units.
Positive z-scores are above the mean, negative z-scores are below it, and z = 0 is exactly average.
Z-scores let you compare scores from different tests by putting them on the same standard scale.
The standard normal distribution has mean 0 and standard deviation 1. Z-score probabilities come from this curve.
This calculator is designed to help you understand the likely number before you make a decision or start an application.
Your result should be checked against official UK guidance, especially if your circumstances include dependants, exemptions, prior leave, or a complex immigration history.
Treat the figure as a planning tool rather than legal advice. Where the answer affects an application deadline or major payment, speak to an authorised adviser.
math calculators
Solve any triangle using SSS, SAS, ASA, AAS, SSA, right triangle, and Pythagorean theorem modes
Calculate →math calculators
Calculate the area of common 2D shapes with formula substitutions and unit conversions
Calculate →math calculators
Calculate the volume and surface area of common 3D shapes with full working and practical litre conversions
Calculate →