Multi-Tool Calculator Suite

WebCalculator Suite

Scientific math, instant unit conversions, and relationship scorecards in one browser-based toolkit.

Type natural expressions like sin(30), pow(2,3), sqrt(81), or x=2*pi. Press Enter or '=' to evaluate.
Constants
Functions
Natural syntax works here: sin(30), sqrt(81), pow(2,3), 20% of 150, and x=2*pi.
Hint
Natural syntax is supported: use '^' for power, functions like sin(30) and pow(2,3), constants like pi or τ, and variables like x=2*pi. Missing ')' are auto-added.
Choose a domain, then convert with plain numeric input such as 12.5, -3, or 6.02e23. Results update instantly as you type.
Choose a category and enter a value to convert.
Double-click to select
From Favorites
To Favorites
Deterministic scorecard

Relationship Scorecard

Build a scenario, then score friendship, love, trust, teamwork, or compatibility. Results are playful and repeatable, not advice.

Scenario based Deterministic For fun, not fate
Pick two names, define the current relationship context, then score the target dynamic you want to explore.
Scenario: Person 1 is (relationship) to Person 2
Add two names to unlock the scorecard and get a deterministic result.
Score (0-100):
Formula + Variables
What-if scenarios
Select one or more target relationship types to compare for the same two people.

Settings

Customize the app. Changes can be applied immediately and saved to browser storage.

Calculator

Unit Converter

Relationship Calculator

Appearance

Advanced

Startup

Help / About

Usage information and diagnostics

📊 Scientific Calculator

Supports basic arithmetic, functions, and constants:

  • Operations: +, -, *, /, ^, !
  • Functions: sqrt(), sin(), cos(), tan(), log(), ln(), exp(), abs()
  • Constants: pi, e
  • Examples: sqrt(16), sin(pi/2), 5!, 2^8

🔄 Unit Converter

Convert between various units:

  • Domains: Length, Mass, Temperature, Time, Speed, Energy, Power, Pressure, Data
  • Features: Real-time conversion, favorites, copy results, swap units
  • Select category → Choose From/To units → Enter value

💕 Relationship Calculator

Calculate compatibility scores (for entertainment only):

  • 75+ relationships across Family, Romantic, Social, Work, Education
  • 6 calculation types: friendship, love, marriage, compatibility, trust, teamwork
  • Features: Fun explanations, what-if scenarios, formula breakdown
  • Note: For fun only — not advice, not truth, not destiny!

ℹ️ About WebCalculator

Version: 1.0.0

A comprehensive web-based calculator combining scientific calculations, unit conversions, and relationship compatibility scoring.

Built with vanilla JavaScript, HTML5, and CSS3. All calculations run locally in your browser. No data is sent to any server.

Settings and favorites are stored in your browser's localStorage.

🔧 Diagnostics

Admin Tools

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Admin tools are hidden until you log in. Hardcoded items are read-only; you can only create/edit/delete custom items.