# Math Tools

> Statistics, equations, sequences, and number theory.

URL: https://uttir.com/math-tools
Tools in this category: 18

## About this category

Math utilities for students, engineers, and data folks: statistics (mean, median, std dev), combinatorics, prime factorization, sequence generators, and equation helpers. All local, no rounding surprises.

## Tools

- [Percentage Calculator](https://uttir.com/percentage-calculator) — Three percentage tools in one: percent of a value, ratio as a percent, and percent change.
- [Pressure Converter](https://uttir.com/pressure-converter) — Convert between pascal, bar, psi, atmosphere, mmHg, torr, and other pressure units instantly.
- [Energy Converter](https://uttir.com/energy-converter) — Convert between joule, kilojoule, calorie, kilocalorie, watt-hour, kilowatt-hour, BTU, electron-volt, and more.
- [Power Converter](https://uttir.com/power-converter) — Convert between watt, kilowatt, megawatt, horsepower (mechanical and metric), BTU/h, and more.
- [Force Converter](https://uttir.com/force-converter) — Convert between newton, kilonewton, dyne, pound-force, kilogram-force, ounce-force, kip, and more.
- [Angle Converter](https://uttir.com/angle-converter) — Convert between degrees, radians, gradians (gon), arcminutes, arcseconds, turns, and milliradians.
- [Fuel Consumption Converter](https://uttir.com/fuel-consumption-converter) — Convert between L/100km, km/L, MPG (US), and MPG (UK) — for cars, motorcycles, and any other vehicle.
- [Data Transfer Rate Converter](https://uttir.com/data-transfer-converter) — Convert between bits/second, bytes/second, kbps, Mbps, Gbps, kB/s, MB/s, GB/s, and more.
- [Random Number Generator](https://uttir.com/random-number-generator) — Pick a random number, roll dice, or shuffle a list. Cryptographically secure, runs locally.
- [Statistics Calculator](https://uttir.com/statistics-calculator) — Compute mean, median, mode, range, variance, standard deviation, and quartiles from a list of numbers.
- [Permutation & Combination Calculator](https://uttir.com/permutation-combination) — Compute nPr and nCr, with optional listing of all arrangements or subsets. Bounded for huge counts.
- [Rental Yield Calculator](https://uttir.com/rental-yield-calculator) — Calculate gross yield, net yield (cap rate), and cash-on-cash return for a rental property. Includes monthly cash flow and time to recoup.
- [Loan Amortization Calculator](https://uttir.com/loan-amortization-calculator) — Generate a full month-by-month amortization schedule for any loan. See principal vs interest, total cost, and the full payment table.
- [Overtime Pay Calculator](https://uttir.com/overtime-calculator) — Calculate weekly pay with overtime. Supports US standard (1.5x after 40 hours/week) and California (1.5x after 8h/day, 2x after 12h/day).
- [Rent vs Buy Calculator](https://uttir.com/rent-vs-buy-calculator) — Compare the total cost of renting vs buying a home over a time horizon. Accounts for mortgage, taxes, insurance, maintenance, appreciation, and opportunity cost of the down payment.
- [Currency Converter](https://uttir.com/currency-converter) — Convert between 30+ world currencies using static daily-refreshed rates. Fast, private, no API key, no tracking, works offline.
- [Random Picker / Wheel of Names](https://uttir.com/random-picker) — Pick a random item from a list with a spinning wheel. Great for giveaways, classroom activities, and team decisions. Runs in your browser, no upload.
- [Coin Flip](https://uttir.com/coin-flip) — Flip a virtual coin or roll dice. Cryptographically fair randomness, runs in your browser, history tracked per session.

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For the full HTML page, visit https://uttir.com/math-tools.
This file is the markdown rendering at https://uttir.com/math-tools.md.