Utilities Calculators Comparison
All 32 Utilities calculators in one comparison table, with the formula and a worked example for each.
What you can work out with these calculators
Utility calculators are the small technical helpers that do not fit anywhere else: QR codes, password strength, colour conversion, text counts and hash-style utilities. Everything runs locally in your browser — nothing you type is sent anywhere — which is why they are safe for tokens and client data.
- Generate a QR code for a link or short text and download it as an image.
- Estimate password strength and see how character set and length change the crack time.
- Convert between hex, RGB and HSL colour values.
- Count words, characters and reading time for a piece of text.
Compare calculators by what you enter
All 32 calculators here, one row each: what each tool works out and the fields it asks for before it does. Open any row to use the calculator itself.
| Calculator | What it works out | What you enter |
|---|---|---|
| QR Code Generator | Generate QR codes for any text or URL | Text or URL |
| Password Generator | Generate strong passwords | Length · Include Symbols · Include Numbers |
| Color Converter | Convert between HEX, RGB, HSL | HEX Color |
| Universal Unit Converter | Convert between any units | Value · From Unit · To Unit |
| Number Base Converter | Convert between binary, decimal, hex | Value · From Base |
| Hash Generator | Generate SHA-256 hash | Text to Hash |
| Lorem Ipsum Generator | Generate placeholder text | Number of Paragraphs |
| UUID Generator | Generate UUID v4 | Number of UUIDs |
| Bill Split & Tip | Split bill and calculate tip | Bill Amount · Tip (%) · Number of People |
| Countdown Timer Calculator | Calculate time until a future event | Target Date |
| File Size Converter | Convert file size units (B, KB, MB, GB) | Size · From · To |
| Salary to Hourly Converter | Convert annual salary to hourly rate | Annual Salary ($) · Hours/Week |
| Area Calculator | Calculate area of common shapes | Shape · Dimension 1 · Dimension 2 |
| Volume Calculator | Calculate volume of 3D shapes | Shape · Dimension 1 · Dimension 2 · Dimension 3 |
| Shipping Cost Calculator | Estimate shipping costs by weight and distance | Weight (kg) · Distance (km) · Speed |
| Biweekly Pay Calculator | Calculate biweekly pay from annual salary | Annual Salary ($) |
| Take-Home Pay Calculator | Gross → net pay after federal, FICA and state tax | Annual Gross Income ($) · Pre-Tax Deductions ($/yr) · State Income Tax % · Filing Status |
| Mileage Reimbursement Calculator | Calculate mileage reimbursement at IRS rate | Miles Driven · Rate per Mile ($) |
| Ratio Simplifier | Simplify and work with ratios | First Number · Second Number |
| GCD & LCM Calculator | Greatest common divisor and least common multiple | First Number · Second Number |
| Prime Number Checker | Check if a number is prime and find factors | Number |
| Rounding Calculator | Round numbers to a specified precision | Number · Decimal Places |
| Coin Flip Simulator | Simulate coin flips with statistics | Number of Flips |
| Dice Roll Simulator | Roll dice and analyze the results | Number of Dice · Sides per Die |
| Date Add/Subtract | Add or subtract days from a date | Start Date · Days (+/-) |
| Exact Age Calculator | Exact age in years, months, and days | Birth Date · Age on Date (optional — default today) |
| Price Per Unit Calculator | Compare prices per unit to find the best deal | Price ($) · Quantity · Unit |
| Random Team Generator | Split names into random teams | Names (comma separated) · Number of Teams |
| Password Entropy Calculator | Strength in bits from length and character pool | Password Length · Character Pool Size (26 lower, 52 mixed case, 62 alphanumeric, 95 all ASCII) |
| Speech Time Calculator | Speaking duration from word count and pace | Word Count · Speaking Pace (words per minute) |
| QR Version Finder | Smallest QR version that fits your byte payload | Payload Size (bytes) · ECC (0=L, 1=M, 2=Q, 3=H) |
| Unix Timestamp Converter | Epoch seconds to readable UTC date | Unix Timestamp (seconds) |
Prefer the annotated list? Browse the full list with one line on what each calculator does.
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