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Scientific Calculator & Formula Notebook Studio
Evaluate scientific expressions safely via mathjs AST parsing across Degrees, Radians, and Gradians (gon) with inverse/hyperbolic trig, logarithms, factorials, nCr/nPr, memory registers, history tape, and multi-line variable sheets.
100% Local Browser Engine · Zero Uploads3 Workspaces
AST Scientific Calculator (DEG · RAD · GON): Safe mathjs AST expression evaluator with Trigonometry, Inverse/Hyperbolic Trig, Logarithms (log10, ln, log2), Factorials, nCr/nPr, Percentages, Memory (M+/M-/MR), and History Tape.
Trigonometric Angle Unit:
ANS = 0MEM (M) = 0
Expression (Keyboard or Keypad)
= 4.5
Calculation Tape (0)
Press Enter or click = Evaluate to record steps on the history tape. Click any entry to reuse its expression or result.
Powered by a deterministic mathjs AST parser (zero JavaScript eval() execution).
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What is Scientific Calculator & Formula Notebook Studio?
Scientific Calculator & Formula Notebook Studio evaluates mathematical expressions locally using a deterministic mathjs AST parser (never JavaScript eval) with full support for Degrees, Radians, and Gradians (gon), inverse/hyperbolic trig, logarithms, combinatorics (nCr/nPr), memory registers, and multi-line variable notebooks.
How to use Scientific Calculator & Formula Notebook Studio in 3 steps
- 1
Select trigonometric angle mode (DEG, RAD, or GON)
Switch between 360° degrees, 2π radians, or 400-gon centesimal surveying grades.
- 2
Type or click scientific expressions
Combine parentheses, powers, roots, sin/cos/tan, asin/acos/atan, ln/log10/log2, and factorials.
- 3
Record on tape or build multi-line variable sheets
Push steps to the history tape or switch to the Formula Notebook tab for named variables.
Key features and benefits
- Supports centesimal Gradians (400 gon) natively for civil engineering and topographic calculations.
- Zero eval() execution — expressions are parsed into an abstract syntax tree with explicit domain checks.
Common use cases
Solving horizontal curve chord, tangent, and triangle trigonometry in degrees or gradians.
Maintaining reusable multi-line engineering calculation sheets with named variables.
Why browser-based works better
Scientific Calculator & Formula Notebook Studio consolidates related finance & engineering studios workflows into one cohesive, multi-mode browser studio — eliminating tab-hopping across fragmented single-purpose tools.
Every mode executes locally using Web APIs and audited client-side libraries, so private files, tokens, and source code never leave your device.
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Scientific Calculator & Formula Notebook Studio FAQs
Quick answers about the workflow, privacy, and where this tool fits in a broader job.
How do Gradians (gon) differ from Degrees?
A full circle is 400 gon (100 gon per right angle), so 1 gon equals 0.9 degrees.
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Tested in Chrome, Firefox, and Safari on desktop and mobile.