Math & Numbers

Calculate the second moment of area (I) and section modulus (Z) for common cross-sections: solid circle, rectangle, hollow tube, and I-beam. Results in mm⁴ and cm⁴.

Finance

Calculate your net worth from a list of assets and liabilities (Net Worth = Total Assets − Total Liabilities). Enter items one per line as 'label, amount'. Shows a per-line breakdown, a share-of-total donut chart, and a financial health rating.

Network

Calculate how much each tunnel or encapsulation layer consumes from your interface MTU, the effective TCP MSS, and the DF ping probe size. For SRE, SD-WAN, and k8s CNI engineers.

Math & Numbers

Look up the molar mass (atomic weight) of several elements at once by symbol, atomic number, or name, as a sortable comparison table.

Data Processing

Paste multiple number combinations and find which numbers repeat across the whole set, with occurrence counts and group positions.

Math & Numbers

Compute linear momentum, mass, or velocity from the other two, with kinetic energy and km/h conversion

Data Analysis

Define input distributions (normal/uniform/lognormal/triangular), write a formula, run thousands of trials, and get the output distribution histogram with confidence intervals.

Calculator

Estimate how much mulch, gravel, topsoil, river rock, sand or compost a landscaping job needs. Enter the area shape (rectangle, circle, triangle or tapered bed/border), dimensions and depth, then pick a material from the built-in density table (or a custom density). The estimator returns volume (m³ / liters / yd³ / ft³), weight (kg / lb / tonnes), the count of 1 m³ or 1 yd³ bulk bags, small retail bag count, optional cost, plus depth and allowance warnings. Metric and imperial units supported.

Text Processing

Translate text to and from International Morse Code (ITU-R M.1677) with live audio playback. Auto-detects direction, adjustable WPM speed (PARIS standard) and tone frequency.

Security

Generate cryptographically secure one-time tokens for web security scenarios — CSRF tokens, OAuth/OIDC state parameters, session nonces, and PKCE code_verifier/code_challenge (S256). Uses crypto.randomBytes, never Math.random.

Validation

Validate or generate numbers using the Modulus-11 (ISO 7064) check-digit algorithm with ISBN-10 (10..2), Norwegian-ID (3,7,6,1,8,9,4,5,2) and generic 2-7 weight schemes.

Math & Numbers

Solve C1V1=C2V2 dilutions, stock-to-working recipes, and simple serial dilution plans