Free to use No signup AES-256 Privacy

Incognito Scientific Calculator

Perform complex scientific calculations and store private notes in an AES-256 encrypted vault that never leaves your browser.

Your secret code is the only key. Notes are encrypted locally before saving. If you lose your code, your encrypted notes cannot be recovered — not even by us.

Use the calculator
Scientific functionsTrig, log, powers & constants
AES-256 vaultWeb Crypto API encryption
Local historyStored in your browser only
Keyboard friendlyFull shortcuts support

Incognito Calculator

Switch between calculator, privacy vault and history.

0

Your code never leaves your device. If you lose it, notes cannot be recovered.

  • No calculations yet.

What this calculator covers

Scientific math and private notes, all running locally in your browser.

Scientific functions

Trig, inverse trig, logs, powers, roots and factorials.

AES-256 vault

PBKDF2 + AES-GCM encryption before local storage.

Local history

Last 20 calculations saved in your browser only.

Export & share

TXT download or WhatsApp share of your last result.

Built and maintained by Bhavin Sheth
Last modified: Oct 12, 2026
Maths & cryptography

Formulas & encryption details

The rules behind the scientific functions and the privacy vault.

01

Trigonometry & angles

sin, cos, tan and their inverses.

Use case

Physics problems, surveying angles, and wave calculations where the input angle must be interpreted correctly.

Formula & example

sin(θ) = opposite / hypotenuse
sin(30°) → 0.5
Toggle DEG/RAD to switch between degrees and radians.

Who uses it

  • Physics students
  • Surveyors
  • Engineers
02

Logarithms & exponents

log, ln, eˣ, 10ˣ and powers.

Use case

Compound interest, decibel calculations, pH levels, and exponential growth or decay problems.

Formula & example

log₁₀(x) = common log; ln(x) = natural log
log(100) → 2; ln(e) → 1
Use xʸ for arbitrary powers.

Who uses it

  • Finance professionals
  • Chemists
  • Data scientists
03

The Privacy Vault

AES-256-GCM with PBKDF2 key derivation.

Use case

Storing passwords, private notes, or sensitive calculations that should never leave your device.

How it works

PBKDF2 (100k iterations, SHA-256) → AES-256-GCM key
Your code + random salt + IV → encrypted blob in localStorage
We never see your code or your notes.

Who uses it

  • Privacy-conscious users
  • Professionals handling sensitive data
  • Students storing exam notes
Honest by design

What this calculator includes — and what it leaves out

Real encryption and real math; the limits are named, not hidden.

Tool limits

  • IEEE 754 double precision — 15 significant digits
  • Factorials overflow above 170!
  • Vault data is tied to this browser — clearing site data erases it
  • Works on desktop, tablet, and mobile with no install

What this tool does

  • Full scientific calculator with DEG/RAD toggle
  • Real AES-256-GCM encryption via Web Crypto API
  • Local history of your last 20 calculations
  • Keyboard shortcuts and TXT / WhatsApp export

What this tool does NOT do

  • It doesn't sync your vault to the cloud or other devices
  • It doesn't offer password recovery — lose the code, lose the notes
  • Calculations run in your browser; the tool does not save your inputs
  • It isn't a substitute for a certified engineering or financial calculation

Standards & references

Where the math and encryption come from, plus related tools on this site.

Questions about the calculator & vault

Straight answers on privacy, functions, and accuracy.

Privacy & vault

How do I access the privacy vault?

Click the 'Privacy' button in the calculator interface, then enter your secret code and click 'Access Vault'. Your secret code can be any combination of numbers, letters, or symbols that you'll remember.

Is my data secure in the privacy vault?

Yes, your data is completely secure. We use genuine Web Crypto API standard AES-256-GCM encryption. It encrypts your notes before saving them locally. We never have access to your private notes, nor is the raw text accessible via browser dev tools.

Does the calculator work on mobile devices?

Absolutely! Our calculator is fully responsive and optimized for all devices including smartphones, tablets, and desktops. The interface adapts to your screen size for the best user experience.

Is the calculator free to use?

Yes, our calculator is completely free to use! All features including the encrypted privacy vault, scientific functions, and sharing options are available at no cost. No registration or subscription required.

Functions & accuracy

What scientific functions are available?

Our calculator includes trigonometric functions (sin, cos, tan and their inverses), logarithmic functions (log, ln), square root, power functions, mathematical constants (π, e), and all basic arithmetic operations.

Can I download my calculation results?

Yes, you can download your calculation results as a text file by clicking the "Download Last Calc" button. You can also copy results to clipboard or share them via WhatsApp.

Can I use keyboard shortcuts?

Yes! You can use your keyboard for faster input. Numbers, operators (+, -, *, /), Enter for equals, Escape for clear, and Backspace for delete last entry all work seamlessly.

How accurate are the calculations?

Our calculator uses high-precision mathematical algorithms to ensure accurate results. For scientific and engineering applications, it maintains precision up to 15 significant digits, which is suitable for most professional and academic needs.

Calculate privately, store securely

No signup required. Scientific math and an AES-256 vault — all running locally in your browser.

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