Standard Deviation Calculator | iSevenPlus
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Standard Deviation Calculator

Calculate standard deviation and variance of 5 values.

📌 Example
Value 1: 2  |  Value 2: 4  |  Value 3: 4  |  Value 4: 5  |  Value 5: 7
✅ Mean = 4.4 | Std Dev = 1.62 | Variance = 2.64

About the Standard Deviation Calculator

The Standard Deviation Calculator is a free online tool that helps you calculate standard deviation and variance of 5 values. in seconds. No signup, no app install — your inputs are processed instantly inside your browser, so the calculation is private and works on mobile, tablet and desktop.

This calculator belongs to the Math & Statistics category, which contains many other useful tools to help with your daily decisions, planning and analysis.

How to use this calculator

  1. Enter the value for Value 1 (e.g. 2).
  2. Enter the value for Value 2 (e.g. 4).
  3. Enter the value for Value 3 (e.g. 4).
  4. Enter the value for Value 4 (e.g. 5).
  5. Enter the value for Value 5 (e.g. 7).
  6. Click Calculate and read the result instantly.
  7. Use Reset to clear all inputs and try a new scenario.

Why use the Standard Deviation Calculator?

  • Instant & accurate — uses precise formulas, no rounding tricks.
  • 100% free — no subscription, no hidden charges, no signup required.
  • Privacy-friendly — calculations run in your browser, your data is never uploaded.
  • Mobile-ready — works smoothly on any phone, tablet or desktop.
  • Made by experts — built and maintained by iSevenPlus.

Example

Try the calculator with sample values: Mean = 4.4 | Std Dev = 1.62 | Variance = 2.64. You can change the inputs to match your own situation.

Frequently Asked Questions

Is the Standard Deviation Calculator free to use?

Yes. Every calculator on Smart Calculators Pro is 100% free, with no signup or registration required.

How accurate are the results?

The calculator uses standard mathematical formulas accepted across the industry. For legal, financial or medical decisions, please confirm with a qualified professional.

Can I use this calculator on my phone?

Yes — the design is fully responsive and works on Android, iOS, tablets and desktop browsers.

Is my data sent to a server?

No. All calculations happen inside your browser. Nothing is uploaded or stored.

Where can I find more Math & Statistics tools?

Browse the full Math & Statistics category or visit our complete calculator directory.