All tools
Z-table
The share of a normal distribution below, above, between or outside any z-score, worked out rather than read from rows. Free, with no account or uploads.
A z-table for any z
Type a z-score and choose which share you want.
The share
Below zAbove zBetween −z and zOutside −z and z
The share below z = 1.96
0.975
97.5% of a standard normal distribution, from Φ worked out to about 15 digits, so no table to read across.
Sums and means are exact; worked out in your browser, and nothing you type is sent anywhere or kept.
A little help along the way
Follow these steps. Every option is explained underneath. Everything runs in your browser; nothing is sent anywhere or kept.
- Say what you want to knowDescribe your numbers, a z-score, or a z-table.
- Paste or type your numbersSeparated by commas, spaces or new lines, and say whether they are a sample or a whole population.
- Read the answerThe figure you came for first, then every measure, and the working under it.
Questions people ask
- Is this a standard normal table?
- Yes, but worked out for any z you type rather than read from rows: the share below, above, between −z and z, or outside them.
- How accurate is it?
- The normal distribution is worked out to about 15 digits and shown to five decimal places.
- What is the share between −1.96 and 1.96?
- 0.95: the familiar 95% that a confidence interval of ±1.96 covers.
This page is the Statistics calculator, opened for this one job; every other tool it has is one press away. Each of its settings is explained on the Statistics calculator's own page.
Read the step-by-step guide